A method and apparatus for adjusting baseline solution parameters

Abstract

The application discloses a kind of baseline solution parameter adjustment method and device, the method includes by obtaining from the observation data of baseline to be solved obtaining baseline length, according to baseline length selects baseline frequency point combination, according to baseline frequency point combination obtains corresponding baseline available ephemeris quantity, then according to baseline available ephemeris quantity determines baseline solution mode, obtains baseline observation time length by baseline solution mode, and determines sampling interval according to baseline observation time length, and then sampling interval and baseline solution mode are integrated into the solution parameter adjustment scheme of baseline to be solved and are output.The baseline solution parameter adjustment method disclosed in the application selects the solution mode more suitable for solving the baseline by the observation data of baseline to be solved, improves the accuracy of baseline solution result;According to the determined baseline solution mode, corresponding sampling interval is selected, and the baseline solution efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of measurement technology, and in particular to a method and apparatus for adjusting baseline calculation parameters. Background Technology

[0002] Setting the solution parameters is a necessary step before GNSS baseline calculation. Appropriate baseline calculation parameters need to be selected based on the actual situation of the observation data to make the baseline calculation results easier to fix and obtain higher accuracy. The solution parameters mainly include sampling interval, elevation angle, fixation rate, navigation system, satellite selection, and calculation mode. Statistical analysis of data such as observation duration, satellite reception, and signal-to-noise ratio is required to determine suitable values ​​for the baseline calculation parameters. Among the solution parameters, the sampling interval controls the number of data points involved in the calculation, while the calculation mode directly affects the calculation results. Therefore, if the accuracy and efficiency of the calculation results need to be adjusted, the calculation mode and sampling interval must be optimized.

[0003] However, if each piece of data is statistically analyzed and tailored to its specific context, it will result in a significant workload and affect the efficiency of baseline calculation. Summary of the Invention

[0004] This invention provides a method and apparatus for adjusting baseline solution parameters, aiming to solve the above-mentioned technical problems and achieve the technical effect of improving the solution efficiency and accuracy of baseline solution results.

[0005] To address the aforementioned technical problems, embodiments of the present invention provide a method for adjusting baseline solution parameters, comprising the following steps:

[0006] Obtain the observation data of the baseline to be solved;

[0007] The baseline length is obtained based on the observation data, and a combination of baseline frequency points is selected based on the baseline length.

[0008] The number of available epochs for the baseline is obtained based on the baseline frequency point combination, and the baseline solution mode is determined based on the number of available epochs for the baseline.

[0009] The baseline observation duration is obtained according to the baseline calculation mode, and the sampling interval is determined according to the baseline observation duration;

[0010] The sampling interval and the baseline solution mode are integrated and output as the solution parameter adjustment scheme for the baseline to be solved.

[0011] The baseline solution parameter adjustment method provided by this invention first calculates the acquired observation data of the baseline to be solved. The baseline length is determined, and then a suitable combination of baseline frequencies is selected based on the determined baseline length. Next, the number of available epochs corresponding to the selected baseline frequency combination is obtained to determine whether the number of available epochs for this baseline frequency combination meets the solution requirements, thereby determining whether the solution mode corresponding to the current baseline frequency combination can be used as the baseline solution mode for the baseline to be solved. Selecting a more suitable solution mode for the baseline to be solved using the observation data can effectively improve the accuracy of the baseline solution results. Furthermore, calculating the observation duration based on the determined baseline solution mode and then selecting a suitable sampling interval as the sampling interval corresponding to the baseline based on the observation duration—that is, selecting the corresponding sampling interval through the determined baseline solution mode—can improve the baseline solution efficiency. Selecting more suitable solution parameters for the baseline to be solved using the observation data, including the solution mode and sampling interval, improves both the accuracy and efficiency of the baseline solution results.

[0012] As a preferred example, the observation data is used to obtain the baseline length, and the baseline frequency point combination is selected based on the baseline length, including:

[0013] The baseline length is calculated based on the approximate coordinates in the observation data, and the baseline length is compared with a preset first baseline length threshold to obtain a first comparison result;

[0014] When the first comparison result is that the baseline length is less than the first baseline length threshold, the first frequency point combination is output as the baseline frequency point combination according to the order of the frequency point combination table.

[0015] The frequency point combination table includes a first frequency point combination, a second frequency point combination, a third frequency point combination, and a fourth frequency point combination.

[0016] To improve the accuracy of baseline calculation results and select a calculation mode that better matches the baseline to be calculated, the calculation parameter adjustment method provided in this invention first calculates the approximate coordinates in the observation data to obtain the approximate length of the baseline to be calculated, i.e., the baseline length, when selecting frequency point combinations. This baseline length is then compared with a preset first baseline length threshold, and the corresponding baseline frequency point combination is selected based on the comparison result. If the comparison result shows that the baseline length is less than the first baseline length threshold, it indicates that the current ionospheric interference with the calculation process is not significant, and a single-frequency calculation mode can be used, improving the calculation efficiency and accuracy of baseline calculation.

[0017] The first frequency point combination in the frequency point combination table provided by this invention is the L1 frequency point combination corresponding to the L1 single-frequency solution mode, while the second, third, and fourth frequency point combinations are all frequency point combinations corresponding to the dual-frequency solution mode. Specifically, the second frequency point combination is an L1L2 frequency point combination, the third frequency point combination is an L1L3 frequency point combination, and the fourth frequency point combination is a dual-frequency combination without an ionosphere. Therefore, by using only the first frequency point combination ranked first in the frequency point combination table as the selected baseline frequency point combination, the frequency point combination corresponding to the single-frequency solution mode can be selected as the baseline frequency point combination, i.e., the solution mode corresponding to the first frequency point combination can be selected as the baseline solution mode.

[0018] As a preferred example, the step of calculating the baseline length based on the approximate coordinates in the observation data, comparing the baseline length with a preset first baseline length threshold to obtain a first comparison result, further includes:

[0019] When the first comparison result is that the baseline length is greater than or equal to the first baseline length threshold, the baseline length is compared with a preset second baseline length threshold to obtain a second comparison result;

[0020] If the second comparison result is that the baseline length is less than the second baseline length threshold, then the second frequency point combination is output as the baseline frequency point combination according to the order of the frequency point combination table.

[0021] If the comparison results show that the baseline length is greater than the first baseline length threshold, the baseline length is compared with the second baseline length threshold to determine whether the baseline length to be solved needs to adopt the dual-frequency solution mode without ionosphere, so as to eliminate the interference of ionosphere and improve the accuracy and precision of the solution results.

[0022] When the baseline length is less than the second baseline length threshold, it means that there is no need to use the dual-frequency solution mode without ionosphere. Instead, it is only necessary to select the second frequency combination ranked second in the frequency combination table as the baseline frequency combination. That is, the second frequency combination corresponding to the L1 L2 dual-frequency solution mode needs to be used as the baseline frequency combination.

[0023] As a preferred example, the step of comparing the baseline length with a preset second baseline length threshold to obtain a second comparison result further includes:

[0024] When the second comparison result is that the baseline length is greater than or equal to the second baseline length threshold, the second frequency point combination, the third frequency point combination, and the fourth frequency point combination are output as the baseline frequency point combination.

[0025] If the comparison results show that the baseline length is greater than the second baseline length threshold, it indicates that an ionosphere-free dual-frequency solution mode needs to be used to solve the baseline. Correspondingly, the ionosphere-free dual-frequency solution mode, as the fourth solution mode, includes the frequency point combinations corresponding to all dual-frequency solution modes, namely the second, third, and fourth frequency point combinations. Therefore, if the comparison results show that the baseline length is greater than the second baseline length threshold, the second, third, and fourth frequency point combinations are integrated and output as the baseline frequency combination for subsequent comparison of the number of available epochs.

[0026] As a preferred example, determining the baseline solution mode based on the number of available epochs of the baseline includes:

[0027] The baseline is compared with the number of available epochs and the epoch number threshold to obtain a third comparison result;

[0028] When the third comparison result is that the number of available epochs of the baseline is greater than or equal to the number of epochs threshold, the solution mode corresponding to the number of available epochs of the baseline is output as the baseline solution mode.

[0029] After determining the baseline frequency combination, the number of available epochs corresponding to the combination can be obtained as the baseline available epochs. After obtaining the baseline available epochs, the number of epochs is compared with the epoch number threshold to determine whether the number of available epochs meets the requirements of baseline solution. Only when the number of available epochs meets the requirements of baseline solution can the solution mode corresponding to the baseline frequency combination be output as the baseline solution mode, thereby improving the accuracy and precision of baseline solution.

[0030] As a preferred example, the step of comparing the baseline with the number of available epochs and an epoch threshold to obtain a third comparison result further includes:

[0031] When the third comparison result is that the number of available epochs of the baseline is less than the number of epochs threshold, the next frequency point combination corresponding to the number of available epochs of the baseline is selected as the baseline frequency point combination according to the order of the frequency point combination table, and the baseline solution mode is determined according to the number of available epochs of the baseline corresponding to the baseline frequency point combination.

[0032] However, if the comparison results show that the number of available epochs for the selected baseline frequency point combination does not meet the requirements for baseline solution, the solution mode corresponding to the selected baseline frequency point combination cannot be output as the baseline solution mode. The solution parameter adjustment method provided by this invention selects the next frequency point combination as the baseline frequency point combination according to the order of the frequency point combination table, and compares the number of available epochs for the adjusted baseline frequency point combination until the number of available epochs for the sequentially selected baseline meets the requirements for baseline solution. This determines that the solution mode corresponding to the sequentially selected frequency point combination can be output as the baseline solution mode, thus avoiding insufficient available epochs for the selected baseline solution mode to support the baseline solution process, reducing the probability of baseline solution errors or anomalies, and increasing the probability of normal baseline solution operation.

[0033] As a preferred example, selecting the next frequency point combination corresponding to the available epochs of the baseline as the baseline frequency point combination according to the order of the frequency point combination table includes:

[0034] If the baseline frequency combination is the fourth frequency combination, the program will trigger an error signal and generate a corresponding error report.

[0035] If the currently selected baseline frequency combination is the fourth frequency combination, meaning it is the fourth and last frequency combination in the frequency combination table, and if the current baseline frequency combination is already the fourth frequency combination, and the number of available epochs corresponding to the determined fourth frequency combination also does not meet the baseline solution requirements, it indicates that the number of available epochs for the initially selected baseline solution mode does not meet the baseline solution requirements, and there are no alternative solution modes. This will trigger an error signal in the solution parameter adjustment program, prompting the user to troubleshoot or update the solution parameter adjustment program, thus improving the program's troubleshooting efficiency.

[0036] As a preferred example, the step of comparing the baseline with the number of available epochs and an epoch threshold to obtain a third comparison result further includes:

[0037] If there are multiple third comparison results and the number of available epochs for the baseline is greater than or equal to the epoch number threshold, then the fourth solution mode is selected as the baseline solution mode; wherein, the fourth solution mode is the ionosphere-free dual-frequency solution mode.

[0038] If the third comparison result is not a single comparison result, it means that the corresponding baseline frequency point combination includes multiple frequency point combinations. Therefore, when determining the comparison result, it is necessary not only to confirm each comparison result, but also to classify each comparison result. As long as there is a third comparison result among the multiple comparison results where the number of available epochs for the baseline is greater than or equal to the epoch number threshold, it means that the suitable solution mode for the baseline to be solved is the fourth solution mode, namely the ionospheric dual-frequency solution mode, in order to reduce ionospheric interference when solving the baseline and improve the accuracy and precision of the baseline solution.

[0039] As a preferred example, determining the sampling interval based on the baseline observation duration includes:

[0040] The baseline observation duration is compared sequentially with multiple preset observation duration thresholds;

[0041] The sampling interval is determined based on multiple fourth comparison results.

[0042] Since a smaller sampling interval results in more data being processed, the processing speed is slower, and thus the processing efficiency is lower, in order to reduce processing time and improve processing efficiency, when selecting the sampling interval for the baseline, the number of available epochs of the determined baseline processing mode is used, i.e., the corresponding baseline observation duration is obtained, and the corresponding sampling interval is determined based on the determined baseline observation duration. This improves the applicability and matching degree between the determined sampling interval and the processing mode.

[0043] By sequentially comparing the determined baseline observation duration with multiple observation duration thresholds, the specific location of the baseline observation duration corresponding to the baseline solution mode is determined. That is, the specific time period within which the baseline observation duration falls, defined by the multiple observation duration thresholds, is determined. Based on the comparison results, i.e., the specific location of the baseline observation duration, the sampling interval of the baseline to be solved is selected. By continuously comparing the baseline observation duration with multiple observation duration thresholds, it is determined between which two observation duration thresholds the baseline observation duration falls, thus determining the sampling interval corresponding to the baseline observation duration.

[0044] Accordingly, this embodiment of the invention also provides a baseline solution parameter adjustment device, which includes an observation data acquisition module, a frequency point combination selection module, a solution mode determination module, a sampling interval determination module, and an adjustment scheme output module; wherein:

[0045] The observation data acquisition module is used to acquire the observation data of the baseline to be solved;

[0046] The frequency point combination selection module is used to obtain the baseline length based on the observation data, and select the baseline frequency point combination based on the baseline length.

[0047] The solution mode determination module is used to obtain the number of available epochs of the baseline based on the baseline frequency point combination, and to determine the baseline solution mode based on the number of available epochs of the baseline.

[0048] The sampling interval determination module is used to obtain the observation duration according to the baseline calculation mode and determine the sampling interval according to the observation duration;

[0049] The adjustment scheme output module is used to integrate the sampling interval and the baseline solution mode and output them as the parameter adjustment scheme of the baseline to be solved. Attached Figure Description

[0050] Figure 1 : A flowchart of an embodiment of the baseline solution parameter adjustment method provided by the present invention;

[0051] Figure 2 : A structural diagram of an embodiment of the baseline solution parameter adjustment device provided by the present invention;

[0052] Figure 3 : A flowchart of an embodiment of the synchronous observation data statistical analysis method provided by the present invention;

[0053] Figure 4 : A flowchart of an embodiment of the baseline solution mode determination method provided by the present invention;

[0054] Figure 5 : A flowchart of one embodiment of the sampling interval determination method provided by the present invention. Detailed Implementation

[0055] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0056] Example 1

[0057] Please refer to Figure 1 The flowchart below shows an embodiment of the baseline solution parameter adjustment method provided by the present invention, including steps 101 to 105, each step as follows:

[0058] Step 101: Obtain the observation data of the baseline to be solved.

[0059] The baseline solution parameter adjustment method provided in this embodiment of the invention first requires obtaining the observation data of the baseline to be solved as reference data when selecting the solution mode and sampling interval of the baseline to be solved. By analyzing the observation data obtained from the baseline to be solved, a solution mode more suitable for the baseline to be solved, and a sampling interval more suitable for the baseline solution mode, are determined, thereby improving the solution accuracy and solution efficiency of the baseline to be solved.

[0060] In this embodiment, to achieve the optimal determination of the subsequent baseline solution mode, a method for statistically analyzing the synchronous observation data of the baseline to be solved is also provided, providing a data foundation for subsequently obtaining the observation data of the baseline to be solved from the synchronous observation data. See details... Figure 3 , Figure 3 This is a flowchart of one embodiment of the synchronous observation data statistical analysis method provided by the present invention. Figure 3 As shown, before obtaining the observation data of the baseline to be solved, the synchronous observation data of the baseline to be solved will be statistically analyzed. The specific steps are as follows:

[0061] A1 Read Ephemeris Data: Read the two observation files that form the baseline to be solved, determine the synchronous observation time of the two observation files, and then read the synchronous observation epoch data in the two observation files respectively.

[0062] A2 Combination Frequency Points: Since each epoch may contain data from multiple frequency points, the baseline solution mode can support various combination methods such as single-frequency, dual-frequency, and triple-frequency, including common L1 single-frequency, L1 L2 dual-frequency, L1 L3 dual-frequency, L1 L2 L3 triple-frequency, and dual-frequency without ionosphere. Therefore, for each epoch data, it is necessary to statistically analyze the actual situation of the corresponding frequency points according to different solution modes.

[0063] A3 Reading Satellite Data: Since a single epoch may contain data from multiple satellites, it is necessary to classify them according to the navigation system and read them one by one.

[0064] A4 reads the signal-to-noise ratio (SNR): This function acquires the SNR data for each frequency point. Since a lower SNR indicates greater noise interference at that frequency, using frequency data with a low SNR in the calculation may cause significant errors. Therefore, it is necessary to read the SNR data for each frequency point in the frequency combination. If the SNR is too low, the current frequency combination is skipped, i.e., the frequency data with a low SNR is excluded.

[0065] A5 calculates multipath effects: By combining carrier pseudorange data from two frequency points, the multipath effect for each frequency point can be calculated. The greater the multipath effect, the more severe the blockage at the corresponding frequency point. Therefore, continuing to use frequency point data with large multipath effects may also cause significant errors. Thus, it is necessary to read the carrier pseudorange of each frequency point in the frequency combination and calculate the multipath effect for each frequency point. If the multipath effect is too severe, the current frequency combination is skipped, i.e., frequency point data with large multipath effects is excluded.

[0066] After eliminating the multipath effect of the current frequency data, it is determined whether all satellites have been read. If not, it returns to step A3 to read the next satellite data; if yes, it proceeds to step A6.

[0067] A6 Count Satellites: Count the number of satellites in the current frequency combination that meet the conditions for both signal-to-noise ratio and multipath effect, and each navigation system needs at least 4 satellites to complete positioning.

[0068] After completing the satellite count, determine whether the number of satellites is sufficient, i.e., whether the number of satellites meets the positioning requirements. If the determination is no, return to step A2 to perform frequency point combination; if the determination is yes, proceed to step A7.

[0069] A7 Records Frequency Combination Results: If the number of satellites in the current frequency combination is sufficient, the current epoch can be solved using the current frequency combination, and the current frequency combination is recorded.

[0070] After recording the current frequency point combination result, determine whether all frequency points have been combined. If the determination is no, return to step A2 to perform frequency point combination; if the determination is yes, proceed to step A8.

[0071] A8 records epoch results: When all frequency point combinations have been detected, record all frequency point combinations that meet the conditions in the current epoch and the epoch time.

[0072] After recording the epoch results, determine whether all epochs have been read. If not, return to step A1 to read the epoch data; if yes, proceed to step A9.

[0073] A9 counts the number of available epochs for frequency point combinations: count all epoch results and count the number of epochs that meet the conditions for each frequency point combination, and then calculate the number of available epochs for each frequency point combination.

[0074] After completing the above-mentioned statistical analysis of synchronous observation data, the observation data required in step 101 of the embodiment can be obtained, including the baseline length, as well as the relevant data on the number of available epochs corresponding to each frequency point combination required for subsequent baseline solution mode determination, providing reference data for subsequent determination of a more suitable baseline solution mode and sampling interval for the baseline to be solved.

[0075] Step 102: Obtain the baseline length based on the observation data, and select a combination of baseline frequency points based on the baseline length.

[0076] In this embodiment, the approximate length of the baseline is obtained by calculating the observation data of the baseline to be solved, i.e., the baseline length. Then, the frequency point combination suitable for the baseline to be solved can be determined based on the obtained baseline length, i.e., the baseline frequency point combination.

[0077] In this embodiment, to make the method for determining the baseline solution mode more specific and clear, see [link to documentation]. Figure 4 , Figure 4 A flowchart illustrating one embodiment of the baseline solution mode determination method provided by the present invention. Figure 4 As shown, the first step is to perform step B1: calculate the approximate length of the baseline, which serves as the basis for selecting the baseline solution mode.

[0078] Specifically, in this embodiment, the acquisition of baseline length from observation data and the selection of baseline frequency point combinations based on the baseline length include:

[0079] The baseline length is calculated based on the approximate coordinates in the observation data, and the baseline length is compared with a preset first baseline length threshold to obtain a first comparison result;

[0080] When the first comparison result is that the baseline length is less than the first baseline length threshold, the first frequency point combination is output as the baseline frequency point combination according to the order of the frequency point combination table.

[0081] The frequency point combination table includes a first frequency point combination, a second frequency point combination, a third frequency point combination, and a fourth frequency point combination.

[0082] To improve the accuracy of baseline calculation results and select a calculation mode that better matches the baseline to be calculated, the calculation parameter adjustment method provided in this invention first calculates the approximate coordinates in the observation data to obtain the approximate length of the baseline to be calculated, i.e., the baseline length, when selecting frequency point combinations. This baseline length is then compared with a preset first baseline length threshold, and the corresponding baseline frequency point combination is selected based on the comparison result. If the comparison result shows that the baseline length is less than the first baseline length threshold, it indicates that the current ionospheric interference with the calculation process is not significant, and a single-frequency calculation mode can be used, improving the calculation efficiency and accuracy of baseline calculation.

[0083] The first frequency point combination in the frequency point combination table provided in this embodiment of the invention is the L1 frequency point combination corresponding to the L1 single-frequency solution mode, while the second, third, and fourth frequency point combinations are all frequency point combinations corresponding to the dual-frequency solution mode. Specifically, the second frequency point combination is an L1L2 frequency point combination, the third frequency point combination is an L1L3 frequency point combination, and the fourth frequency point combination is a dual-frequency combination without an ionosphere. Therefore, only the first frequency point combination ranked first in the frequency point combination table needs to be used as the selected baseline frequency point combination; that is, the frequency point combination corresponding to the single-frequency solution mode can be selected as the baseline frequency point combination, i.e., the solution mode corresponding to the first frequency point combination can be selected as the baseline solution mode.

[0084] See details Figure 4 After the baseline length is calculated and obtained in step B1, the baseline length is compared with 1km to determine whether the baseline length is greater than 1km. In this embodiment, the first baseline length threshold is preferably 1km. Users can adjust the specific value of the first baseline length threshold according to the actual situation.

[0085] If the baseline length is determined to be less than the first baseline length threshold, then execute B2: check the number of available epochs for the L1 frequency point combination. If the approximate baseline length is less than 1 km, it indicates that the ionosphere's interference with the solution process is not significant at this point. Therefore, only the L1 single-frequency solution mode can be used for solution, i.e., the L1 frequency point combination is selected as the baseline frequency point combination. However, it is still necessary to check whether the number of available epochs for the L1 frequency point combination, i.e., the first frequency point combination, is sufficient before determining whether the L1 single-frequency solution mode can be used as the baseline solution mode.

[0086] In addition, this embodiment calculates the baseline length based on the approximate coordinates in the observation data, compares the baseline length with a preset first baseline length threshold to obtain a first comparison result, and further includes:

[0087] When the first comparison result is that the baseline length is greater than or equal to the first baseline length threshold, the baseline length is compared with a preset second baseline length threshold to obtain a second comparison result;

[0088] If the second comparison result is that the baseline length is less than the second baseline length threshold, then the second frequency point combination is output as the baseline frequency point combination according to the order of the frequency point combination table.

[0089] If the comparison results show that the baseline length is greater than the first baseline length threshold, the baseline length is compared with the second baseline length threshold to determine whether the baseline length to be solved needs to adopt the dual-frequency solution mode without ionosphere, so as to eliminate the interference of ionosphere and improve the accuracy and precision of the solution results.

[0090] When the baseline length is less than the second baseline length threshold, it means that there is no need to use the dual-frequency solution mode without ionosphere. Instead, it is only necessary to select the second frequency combination ranked second in the frequency combination table as the baseline frequency combination. That is, the second frequency combination corresponding to the L1 L2 dual-frequency solution mode needs to be used as the baseline frequency combination.

[0091] See details Figure 4 If the baseline length is determined to be greater than the first baseline length threshold, then a second comparison of the baseline length is performed. Figure 4 The baseline length is compared with a second baseline length threshold to determine whether to use the second frequency point combination as the baseline frequency point combination. In this embodiment, the second baseline length threshold is preferably 10km.

[0092] If the baseline length is determined to be less than the second baseline length threshold, then execute B3: check the number of available epochs for the L1L2 frequency point combination. If the approximate baseline length is determined to be greater than 1km but less than 10km, or if the number of available epochs in the L1 single-frequency solution mode is insufficient, then the L1L2 dual-frequency solution mode can be used, i.e., the second frequency point combination is selected as the baseline frequency point combination. Similarly, at this time, it is necessary to check whether the number of available epochs for the L1L2 frequency point combination, i.e., the second frequency point combination, is sufficient, before determining whether the L1L2 dual-frequency solution mode can be used as the baseline solution mode.

[0093] Furthermore, this embodiment compares the baseline length with a preset second baseline length threshold to obtain a second comparison result, and also includes:

[0094] When the second comparison result is that the baseline length is greater than or equal to the second baseline length threshold, the second frequency point combination, the third frequency point combination, and the fourth frequency point combination are output as the baseline frequency point combination.

[0095] If the comparison results show that the baseline length is greater than the second baseline length threshold, it indicates that an ionosphere-free dual-frequency solution mode needs to be used to solve the baseline. Correspondingly, the ionosphere-free dual-frequency solution mode, as the fourth solution mode, includes the frequency point combinations corresponding to all dual-frequency solution modes, namely the second, third, and fourth frequency point combinations. Therefore, if the comparison results show that the baseline length is greater than the second baseline length threshold, the second, third, and fourth frequency point combinations are integrated and output as the baseline frequency combination for subsequent comparison of the number of available epochs.

[0096] See details Figure 4 If the baseline length is determined to be greater than the second baseline length threshold, then execution will be performed. Figure 4B5 shows the number of available epochs for the frequency combinations of L1L2, L1L3, and L2L3. This means that if the approximate baseline length is greater than 10km, the solution can be adjusted to use the ionospheric dual-frequency solution mode, i.e., the fourth solution mode. Correspondingly, the frequency combinations for this fourth solution mode include the second frequency combination (L1L2), the third frequency combination (L1L3), and the fourth frequency combination (including L2L3), encompassing all ionospheric dual-frequency combinations. Therefore, if the baseline length is determined to be greater than the second baseline length threshold, the second, third, and fourth frequency combinations are integrated and output as the baseline frequency combination for subsequent epoch comparison.

[0097] Step 103: Obtain the number of available epochs of the baseline based on the baseline frequency point combination, and determine the baseline solution mode based on the number of available epochs of the baseline.

[0098] Once the baseline frequency combination is determined, the number of available epochs corresponding to that combination can be obtained as the baseline available epochs. Based on the determined baseline available epochs, the corresponding baseline solution mode can be further determined to improve the baseline solution efficiency.

[0099] In this embodiment, different solution modes each have their advantages and disadvantages. The single-frequency solution mode offers a faster solution rate and higher accuracy, but it struggles to eliminate ionospheric interference from the baseline. Therefore, when the baseline length is long, using the single-frequency solution mode will result in reduced accuracy. Correspondingly, when solving long baselines, a dual-frequency or multi-frequency solution mode should be used to minimize ionospheric interference and improve the accuracy of the baseline solution results. The baseline solution parameter adjustment method provided in this embodiment requires consideration of the actual baseline conditions and the available epoch statistics for frequency point combinations when determining the solution mode, selecting the most suitable solution mode for the baseline.

[0100] See details Figure 4 After determining the baseline frequency point combination, as shown in B2, B3 and B4, it is also necessary to determine the number of available epochs for the corresponding baseline frequency point combination to determine whether the number of available epochs is sufficient, that is, whether the number of available epochs of the baseline frequency point combination meets the requirements of baseline solution.

[0101] If the requirements are met, then execute B6: Use L1 single-frequency solution mode, specifically: if the number of available epochs of the L1 frequency point combination, i.e. the first frequency point combination, is sufficient, then set the baseline solution mode to L1 single-frequency solution mode, i.e. the first solution mode.

[0102] B7: Use L1 L2 dual-frequency solution mode, specifically: if the number of available epochs for the L1 L2 frequency point combination, i.e. the second frequency point combination, is sufficient, then set the baseline solution mode to L1 L2 dual-frequency solution mode, i.e. the second solution mode.

[0103] B8: Use L1 L3 dual-frequency solution mode. Specifically, if the number of available epochs for the L1 L3 frequency point combination (i.e., the third frequency point combination) is sufficient, then set the baseline solution mode to L1 L3 dual-frequency solution mode (i.e., the third solution mode).

[0104] Furthermore, this embodiment determines the baseline solution mode based on the number of available epochs of the baseline, including:

[0105] The baseline is compared with the number of available epochs and the epoch number threshold to obtain a third comparison result;

[0106] When the third comparison result is that the number of available epochs of the baseline is greater than or equal to the number of epochs threshold, the solution mode corresponding to the number of available epochs of the baseline is output as the baseline solution mode.

[0107] After determining the baseline frequency combination, the number of available epochs corresponding to the combination can be obtained as the baseline available epochs. After obtaining the baseline available epochs, the number of epochs is compared with the epoch number threshold to determine whether the number of available epochs meets the requirements of baseline solution. Only when the number of available epochs meets the requirements of baseline solution can the solution mode corresponding to the baseline frequency combination be output as the baseline solution mode, thereby improving the accuracy and precision of baseline solution.

[0108] In addition, this embodiment compares the available number of epochs of the baseline with the epoch number threshold to obtain a third comparison result, which also includes:

[0109] When the third comparison result is that the number of available epochs of the baseline is less than the number of epochs threshold, the next frequency point combination corresponding to the number of available epochs of the baseline is selected as the baseline frequency point combination according to the order of the frequency point combination table, and the baseline solution mode is determined according to the number of available epochs of the baseline corresponding to the baseline frequency point combination.

[0110] However, if the comparison results show that the number of available epochs for the selected baseline frequency point combination does not meet the requirements for baseline solution, the solution mode corresponding to the selected baseline frequency point combination cannot be output as the baseline solution mode. The solution parameter adjustment method provided by this invention selects the next frequency point combination as the baseline frequency point combination according to the order of the frequency point combination table, and compares the number of available epochs for the adjusted baseline frequency point combination until the number of available epochs for the sequentially selected baseline meets the requirements for baseline solution. This determines that the solution mode corresponding to the sequentially selected frequency point combination can be output as the baseline solution mode, thus avoiding insufficient available epochs for the selected baseline solution mode to support the baseline solution process, reducing the probability of baseline solution errors or anomalies, and increasing the probability of normal baseline solution operation.

[0111] See details Figure 4 If it is determined that the number of available epochs for the current baseline frequency combination is insufficient to support the subsequent baseline solution process, then the frequency combinations at the next level will be sequentially adjusted to baseline frequency combinations, such as... Figure 4 If the number of available epochs for the L1 frequency combination (i.e., the first frequency combination) is insufficient, then the L1-L2 frequency combination (i.e., the second frequency combination) is used as the baseline frequency combination. It is then determined whether the number of available epochs for the second frequency combination meets the requirements. If the number of available epochs for the second frequency combination is insufficient, then... Figure 4 If the number of available epochs for the L1-L2 frequency combination shown is still insufficient, then the third frequency combination will be used. Figure 4 The L1 and L3 frequency point combinations shown are adjusted to the baseline frequency point combinations, and it is determined whether the number of available epochs corresponding to the third frequency point combination meets the requirements.

[0112] Furthermore, in this embodiment, the next frequency point combination corresponding to the available epochs of the baseline is selected as the baseline frequency point combination according to the order of the frequency point combination table, including:

[0113] If the baseline frequency combination is the fourth frequency combination, the program will trigger an error signal and generate a corresponding error report.

[0114] If the currently selected baseline frequency combination is the fourth frequency combination, meaning it is the fourth and last frequency combination in the frequency combination table, and if the current baseline frequency combination is already the fourth frequency combination, and the number of available epochs corresponding to the determined fourth frequency combination also does not meet the baseline solution requirements, it indicates that the number of available epochs for the initially selected baseline solution mode does not meet the baseline solution requirements, and there are no alternative solution modes. This will trigger an error signal in the solution parameter adjustment program, prompting the user to troubleshoot or update the solution parameter adjustment program, thus improving the program's troubleshooting efficiency.

[0115] See details Figure 4 If it is determined that the current baseline frequency combination is the fourth frequency combination, and it is determined that the number of available epochs corresponding to the fourth frequency combination is still insufficient, then execute B10: error report. Specifically, if it is determined that the number of available epochs of the initially selected baseline solution mode is insufficient, and there are no other alternative solution modes, then the program will report an error and trigger the corresponding program error signal. At the same time, a corresponding error report will be generated and sent to the user for error tracing.

[0116] In addition, this embodiment compares the available number of epochs of the baseline with the epoch number threshold to obtain a third comparison result, which also includes:

[0117] If there are multiple third comparison results and the number of available epochs for the baseline is greater than or equal to the epoch number threshold, then the fourth solution mode is selected as the baseline solution mode; wherein, the fourth solution mode is the ionosphere-free dual-frequency solution mode.

[0118] If the third comparison result is not a single comparison result, it means that the corresponding baseline frequency point combination includes multiple frequency point combinations. Therefore, when determining the comparison result, it is necessary not only to confirm each comparison result, but also to classify each comparison result. As long as there is a third comparison result among the multiple comparison results where the number of available epochs for the baseline is greater than or equal to the epoch number threshold, it means that the suitable solution mode for the baseline to be solved is the fourth solution mode, namely the ionospheric dual-frequency solution mode, in order to reduce ionospheric interference when solving the baseline and improve the accuracy and precision of the baseline solution.

[0119] See details Figure 4 If there are multiple third comparison results, and one of the multiple comparison results is a third comparison result with a baseline, the number of available epochs is greater than or equal to the number of epochs threshold. Specifically, check whether the number of available epochs for the L1 L2, L1 L3, and L2 L3 frequency point combinations is sufficient, that is, determine whether the number of available epochs for the second, third, and fourth frequency point combinations is sufficient.

[0120] If the number of available epochs corresponding to any of the above three frequency point combinations is sufficient, then execute B9: use the ionosphere-free dual-frequency solution mode, i.e., the fourth solution mode. Specifically, as long as the number of available epochs for any of the frequency point combinations L1L2, L1L3, and L2L3 is sufficient, then the ionosphere-free dual-frequency solution mode can be used. In this embodiment, the L1L2 frequency point combination is preferably the second frequency point combination, the L1L3 frequency point combination is the third frequency point combination, and the L2L3 frequency point combination is the fourth frequency point combination. However, the fourth frequency point combination does not only include the L2L3 frequency point combination. As an ionosphere-free dual-frequency combination, the fourth frequency point combination includes all remaining ionosphere-free dual-frequency combinations other than the first, second, and third frequency point combinations.

[0121] Step 104: Obtain the baseline observation duration according to the baseline solution mode, and determine the sampling interval according to the baseline observation duration.

[0122] Once the baseline resolution mode for the baseline to be resolved is determined, a suitable sampling interval can be determined based on the determined baseline resolution mode. Since a smaller sampling interval results in more data participating in the baseline resolution, and consequently, a slower baseline resolution speed, the resolution parameter adjustment method provided in this invention determines a suitable sampling interval based on the number of available epochs in the resolution mode in order to minimize resolution time and improve baseline resolution efficiency.

[0123] Specifically, in this embodiment, the sampling interval is determined based on the baseline observation duration, including:

[0124] The baseline observation duration is compared sequentially with multiple preset observation duration thresholds;

[0125] The sampling interval is determined based on multiple fourth comparison results.

[0126] Since a smaller sampling interval results in more data being processed, the processing speed is slower, and thus the processing efficiency is lower, in order to reduce processing time and improve processing efficiency, when selecting the sampling interval for the baseline, the number of available epochs of the determined baseline processing mode is used, i.e., the corresponding baseline observation duration is obtained, and the corresponding sampling interval is determined based on the determined baseline observation duration. This improves the applicability and matching degree between the determined sampling interval and the processing mode.

[0127] By sequentially comparing the determined baseline observation duration with multiple observation duration thresholds, the specific location of the baseline observation duration corresponding to the baseline solution mode is determined. That is, the specific time period within which the baseline observation duration falls, defined by the multiple observation duration thresholds, is determined. Based on the comparison results, i.e., the specific location of the baseline observation duration, the sampling interval of the baseline to be solved is selected. By continuously comparing the baseline observation duration with multiple observation duration thresholds, it is determined between which two observation duration thresholds the baseline observation duration falls, thus determining the sampling interval corresponding to the baseline observation duration.

[0128] See details Figure 5 , Figure 5 This is a flowchart of one embodiment of the sampling interval determination method provided by the present invention. Figure 5 As shown, after determining the baseline solution mode, C1 is executed first: calculate the observation duration of the frequency point combination corresponding to the solution mode. Specifically, by using the ratio of the number of available epochs to the total number of epochs of the baseline frequency point combination corresponding to the baseline solution mode, combined with the synchronous observation duration of the baseline, the observation duration applicable to the current baseline solution mode can be calculated, and the corresponding sampling interval can be further determined by the baseline observation duration of the baseline solution mode.

[0129] By comparing the observation duration sequentially with multiple observation duration thresholds, specifically: first, the observation duration is compared with the first observation duration threshold... Figure 5 A comparison is performed after 2 minutes. If the comparison result shows that the observation duration is less than the first observation duration threshold, then... Figure 5 If it takes 2 minutes, then execute. Figure 5 As shown in C2: The sampling interval is set to 1 second. Specifically, if the baseline observation duration of the baseline solution mode is less than 2 minutes, then the sampling interval is set to 1 second.

[0130] If the comparison results show that the observation duration is greater than or equal to the first observation duration threshold, then the observation duration will be compared sequentially with the second observation duration threshold. Figure 5 A comparison is performed over a period of 6 minutes. If the comparison result shows that the observation duration is less than the second observation duration threshold, then... Figure 5 If it takes 6 minutes, then execute. Figure 5 As shown in C3: The sampling interval is set to 5s. Specifically, if the baseline observation duration of the baseline solution mode is greater than 2 minutes but less than 6 minutes, then the sampling interval is set to 5s.

[0131] If the comparison results show that the observation duration is greater than or equal to the second observation duration threshold, then the observation duration will be compared sequentially with the third observation duration threshold. Figure 5 A comparison is made using 120 minutes as shown. If the comparison result shows that the observation duration is less than the third observation duration threshold, then... Figure 5 If 120 minutes is specified, then the process will be executed. Figure 5As shown in C4: The sampling interval is set to 10s. Specifically, if the baseline observation duration of the baseline solution mode is greater than 6 minutes but less than 120 minutes, then the sampling interval is set to 10s.

[0132] If the comparison results show that the observation duration is greater than or equal to the third observation duration threshold, then the observation duration will be compared sequentially with the fourth observation duration threshold. Figure 5 A comparison is made using 480 minutes as shown. If the comparison result shows that the observation duration is less than the third observation duration threshold, then... Figure 5 If 480 minutes is specified, then the process will be executed. Figure 5 As shown in C5: The sampling interval is set to 30s. Specifically, if the baseline observation duration of the baseline solution mode is greater than 120 minutes but less than 480 minutes, then the sampling interval is set to 30s.

[0133] If the comparison results show that the observation duration is greater than or equal to the fourth observation duration threshold, then execute... Figure 5 As shown in C6: The sampling interval is set to 60s. Specifically, if the baseline observation duration of the baseline solution mode is greater than 480 minutes, then the sampling interval is set to 60s.

[0134] Step 105: Integrate the sampling interval and the baseline solution mode and output them as the solution parameter adjustment scheme for the baseline to be solved.

[0135] Once the baseline solution mode and sampling interval are determined, they can be integrated into a parameter adjustment scheme for the baseline to be solved and output. This allows users to adjust the baseline solution parameters of the baseline to be solved according to the parameter adjustment method, thereby improving the solution accuracy, precision and efficiency of the baseline.

[0136] The baseline solution parameter adjustment method provided in this embodiment of the invention first calculates the acquired observation data of the baseline to be solved. The baseline length is determined, and then a suitable combination of baseline frequencies is selected based on the determined baseline length. The number of available epochs corresponding to the selected baseline frequency combination is then obtained to determine whether the number of available epochs corresponding to the baseline frequency combination meets the solution requirements, thereby determining whether the solution mode corresponding to the current baseline frequency combination can be used as the baseline solution mode for the baseline to be solved. Selecting a more suitable solution mode for the baseline by using the observation data of the baseline to be solved improves the accuracy of the baseline solution results. Furthermore, the observation duration is calculated based on the determined baseline solution mode, and a suitable sampling interval is selected as the sampling interval corresponding to the baseline based on the observation duration. That is, selecting the corresponding sampling interval through the determined baseline solution mode improves the baseline solution efficiency. Selecting more suitable solution parameters for the baseline by using the observation data of the baseline, including the solution mode and sampling interval, improves both the accuracy and efficiency of the baseline solution results.

[0137] To better illustrate the working principle and steps of the baseline calculation parameter adjustment method and apparatus of the present invention, please refer to the relevant description above, but not limited to.

[0138] Accordingly, see Figure 2 , Figure 2 This is a structural diagram of one embodiment of the baseline calculation parameter adjustment device provided by the present invention. (See diagram below.) Figure 2 As shown, the adjustment device includes an observation data acquisition module 201, a frequency point combination selection module 202, a solution mode determination module 203, a sampling interval determination module 204, and an adjustment scheme output module 205; wherein:

[0139] The observation data acquisition module 201 is used to acquire the observation data of the baseline to be solved.

[0140] The frequency point combination selection module 202 is used to obtain the baseline length based on the observation data and select the baseline frequency point combination based on the baseline length.

[0141] Furthermore, the frequency point combination selection module 202 obtains the baseline length based on the observation data and selects the baseline frequency point combination using the baseline length, including:

[0142] The baseline length is calculated based on the approximate coordinates in the observation data, and the baseline length is compared with a preset first baseline length threshold to obtain a first comparison result;

[0143] When the first comparison result is that the baseline length is less than the first baseline length threshold, the first frequency point combination is output as the baseline frequency point combination according to the order of the frequency point combination table.

[0144] The frequency point combination table includes a first frequency point combination, a second frequency point combination, a third frequency point combination, and a fourth frequency point combination.

[0145] Furthermore, the frequency point combination selection module 202 calculates the baseline length based on the approximate coordinates in the observation data, compares the baseline length with a preset first baseline length threshold to obtain a first comparison result, and further includes:

[0146] When the first comparison result is that the baseline length is greater than or equal to the first baseline length threshold, the baseline length is compared with a preset second baseline length threshold to obtain a second comparison result;

[0147] If the second comparison result is that the baseline length is less than the second baseline length threshold, then the second frequency point combination is output as the baseline frequency point combination according to the order of the frequency point combination table.

[0148] Furthermore, the frequency point combination selection module 202 compares the baseline length with a preset second baseline length threshold to obtain a second comparison result, and also includes:

[0149] When the second comparison result is that the baseline length is greater than or equal to the second baseline length threshold, the second frequency point combination, the third frequency point combination, and the fourth frequency point combination are output as the baseline frequency point combination.

[0150] The solution mode determination module 203 is used to obtain the number of available epochs of the baseline based on the baseline frequency point combination, and to determine the baseline solution mode based on the number of available epochs of the baseline.

[0151] Furthermore, the solution mode determination module 203 determines the baseline solution mode based on the number of available epochs of the baseline, including:

[0152] The baseline is compared with the number of available epochs and the epoch number threshold to obtain a third comparison result;

[0153] When the third comparison result is that the number of available epochs of the baseline is greater than or equal to the number of epochs threshold, the solution mode corresponding to the number of available epochs of the baseline is output as the baseline solution mode.

[0154] Furthermore, the solution mode determination module 203 compares the available epochs of the baseline with the epoch number threshold to obtain a third comparison result, which also includes:

[0155] When the third comparison result is that the number of available epochs of the baseline is less than the number of epochs threshold, the next frequency point combination corresponding to the number of available epochs of the baseline is selected as the baseline frequency point combination according to the order of the frequency point combination table, and the baseline solution mode is determined according to the number of available epochs of the baseline corresponding to the baseline frequency point combination.

[0156] Furthermore, the solution mode determination module 203 selects the next frequency point combination corresponding to the available epochs of the baseline as the baseline frequency point combination according to the order of the frequency point combination table, including:

[0157] If the baseline frequency combination is the fourth frequency combination, the program will trigger an error signal and generate a corresponding error report.

[0158] Furthermore, the solution mode determination module 203 compares the available epochs of the baseline with the epoch number threshold to obtain a third comparison result, which also includes:

[0159] If there are multiple third comparison results and the number of available epochs for the baseline is greater than or equal to the epoch number threshold, then the fourth solution mode is selected as the baseline solution mode; wherein, the fourth solution mode is the ionosphere-free dual-frequency solution mode.

[0160] The sampling interval determination module 204 is used to obtain the observation duration according to the baseline calculation mode and determine the sampling interval according to the observation duration.

[0161] Furthermore, the sampling interval determination module 204 determines the sampling interval based on the baseline observation duration, including:

[0162] The baseline observation duration is compared sequentially with multiple preset observation duration thresholds to obtain multiple fourth comparison results;

[0163] The sampling interval is determined based on multiple fourth comparison results.

[0164] The adjustment scheme output module 205 is used to integrate the sampling interval and the baseline calculation mode and output them as the parameter adjustment scheme of the baseline to be calculated.

[0165] In summary, this invention provides a method and apparatus for adjusting baseline solution parameters. It obtains the baseline length from observation data of the baseline to be solved, selects a baseline frequency point combination based on the baseline length, obtains the number of available epochs for the corresponding baseline based on the baseline frequency point combination, determines the baseline solution mode based on the number of available epochs, obtains the baseline observation duration based on the baseline solution mode, determines the sampling interval based on the baseline observation duration, and then integrates the sampling interval and the baseline solution mode into an adjustment scheme for the solution parameters of the baseline to be solved, which is then output. By selecting a solution mode more suitable for solving the baseline from the observation data of the baseline to be solved, the accuracy of the baseline solution results is improved; and by selecting the corresponding sampling interval based on the determined baseline solution mode, the efficiency of baseline solution is improved.

[0166] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. In particular, it should be noted that any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention for those skilled in the art.

Claims

1. A method for adjusting baseline solution parameters, characterized in that, Includes the following steps: Step 101: Obtain the observation data of the baseline to be solved; Step 102: Obtain the baseline length based on the observation data, and select a combination of baseline frequency points based on the baseline length; Step 102 specifically includes: calculating the baseline length based on the approximate coordinates in the observation data, comparing the baseline length with a preset first baseline length threshold, and obtaining a first comparison result; When the first comparison result indicates that the baseline length is less than the first baseline length threshold, the first frequency point combination is output as the baseline frequency point combination according to the order of the frequency point combination table; wherein, the frequency point combination table includes the first frequency point combination, the second frequency point combination, the third frequency point combination, and the fourth frequency point combination; When the first comparison result is that the baseline length is greater than or equal to the first baseline length threshold, the baseline length is compared with a preset second baseline length threshold to obtain a second comparison result; When the second comparison result is that the baseline length is less than the second baseline length threshold, the second frequency point combination is output as the baseline frequency point combination according to the order of the frequency point combination table; when the second comparison result is that the baseline length is greater than or equal to the second baseline length threshold, the second frequency point combination, the third frequency point combination, and the fourth frequency point combination are output as the baseline frequency point combination. Step 103: Obtain the number of available epochs of the baseline based on the baseline frequency point combination, and determine the baseline solution mode based on the number of available epochs of the baseline; Step 103 specifically includes: comparing the number of available epochs of the baseline with the epoch number threshold to obtain a third comparison result; When the third comparison result is that the number of available epochs of the baseline is greater than or equal to the number of epochs threshold, the solution mode corresponding to the number of available epochs of the baseline is output as the baseline solution mode. When the third comparison result is that the number of available epochs of the baseline is less than the number of epochs threshold, the next frequency point combination corresponding to the number of available epochs of the baseline is selected as the baseline frequency point combination according to the order of the frequency point combination table, and the baseline solution mode is determined according to the number of available epochs of the baseline corresponding to the baseline frequency point combination. If there are multiple third comparison results and the number of available epochs for the baseline is greater than or equal to the epoch number threshold, then the fourth solution mode is selected as the baseline solution mode; wherein, the fourth solution mode is the ionosphere-free dual-frequency solution mode. Step 104: Obtain the baseline observation duration according to the baseline calculation mode, and determine the sampling interval according to the baseline observation duration; Step 105: Integrate the sampling interval and the baseline solution mode and output them as the solution parameter adjustment scheme for the baseline to be solved.

2. The method for adjusting baseline solution parameters as described in claim 1, characterized in that, The step of selecting the next frequency point combination corresponding to the available epochs of the baseline as the baseline frequency point combination according to the order of the frequency point combination table includes: If the baseline frequency combination is the fourth frequency combination, the program will trigger an error signal and generate a corresponding error report.

3. The method for adjusting baseline solution parameters as described in claim 1, characterized in that, The step of determining the sampling interval based on the baseline observation duration includes: The baseline observation duration is compared sequentially with multiple preset observation duration thresholds to obtain multiple fourth comparison results; The sampling interval is determined based on multiple fourth comparison results.

4. A device for adjusting baseline solution parameters, characterized in that, The adjustment device includes an observation data acquisition module, a frequency point combination selection module, a solution mode determination module, a sampling interval determination module, and an adjustment scheme output module; wherein: The observation data acquisition module is used to acquire the observation data of the baseline to be solved; The frequency point combination selection module is used to obtain the baseline length based on the observation data and select a baseline frequency point combination based on the baseline length; specifically, it includes: calculating the baseline length based on the approximate coordinates in the observation data, comparing the baseline length with a preset first baseline length threshold, and obtaining a first comparison result; When the first comparison result indicates that the baseline length is less than the first baseline length threshold, the first frequency point combination is output as the baseline frequency point combination according to the order of the frequency point combination table; wherein, the frequency point combination table includes the first frequency point combination, the second frequency point combination, the third frequency point combination, and the fourth frequency point combination; When the first comparison result is that the baseline length is greater than or equal to the first baseline length threshold, the baseline length is compared with a preset second baseline length threshold to obtain a second comparison result; When the second comparison result is that the baseline length is less than the second baseline length threshold, the second frequency point combination is output as the baseline frequency point combination according to the order of the frequency point combination table; when the second comparison result is that the baseline length is greater than or equal to the second baseline length threshold, the second frequency point combination, the third frequency point combination, and the fourth frequency point combination are output as the baseline frequency point combination. The solution mode determination module is used to obtain the number of available epochs of the baseline based on the baseline frequency point combination, and to determine the baseline solution mode based on the number of available epochs of the baseline; specifically, it includes: comparing the number of available epochs of the baseline with an epoch number threshold to obtain a third comparison result; When the third comparison result is that the number of available epochs of the baseline is greater than or equal to the number of epochs threshold, the solution mode corresponding to the number of available epochs of the baseline is output as the baseline solution mode. When the third comparison result is that the number of available epochs of the baseline is less than the number of epochs threshold, the next frequency point combination corresponding to the number of available epochs of the baseline is selected as the baseline frequency point combination according to the order of the frequency point combination table, and the baseline solution mode is determined according to the number of available epochs of the baseline corresponding to the baseline frequency point combination. If there are multiple third comparison results and the number of available epochs for the baseline is greater than or equal to the epoch number threshold, then the fourth solution mode is selected as the baseline solution mode; wherein, the fourth solution mode is the ionosphere-free dual-frequency solution mode. The sampling interval determination module is used to obtain the observation duration according to the baseline calculation mode and determine the sampling interval according to the observation duration; The adjustment scheme output module is used to integrate the sampling interval and the baseline solution mode and output them as the parameter adjustment scheme of the baseline to be solved.

Images