Semi-physical test method and device for satellite-borne phase interferometer positioning system

Abstract

The invention discloses a semi-physical testing method and device for a satellite-borne phase interferometer positioning system, and relates to the field of electronic reconnaissance. According to the invention, the problem that a phase interferometer positioning system cannot realize space-fed test in a microwave anechoic chamber is solved. Through the test of the device, the positioning test of the phase interferometer positioning system on various target scenes can be fully verified, and the coverage area dimension comprises the positioning test of targets in the coverage area, the coverage area boundary, even the area outside the coverage area and the like. The signal pattern dimension comprises but is not limited to positioning tests of PRI change, frequency agility, frequency group change, intra-pulse modulation and other patterns, and the signal parameter dimension comprises tests of frequency, PRI and pulse width change in a wide range. In addition, verification of the positioning precision of the phase interferometer positioning system under the condition that the radiation source signal and the calibration signal exist at the same time is supported.

Description

Technical Field

[0001] The invention relates to the field of electronic reconnaissance, and in particular to a semi-physical testing method and device for a satellite-borne phase interferometer positioning system. Background Art

[0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

[0003] In the field of electronic reconnaissance passive positioning, the use of phase interferometer positioning systems to obtain target position information has been widely used in practical engineering. Phase interferometer positioning systems must undergo sufficient functional performance index testing and verification on the ground before delivery. Especially for satellite-borne systems, ground simulation test verification system devices are indispensable.

[0004] Regarding the ground test system of the phase interferometer positioning system, the document "Research on the Semi-physical Simulation Test Method of the Passive Positioning Performance of Interferometer" [J]. Journal of Air Force Early Warning Academy, 2016, 30(2): 79-82, mainly aimed at the shortcomings of the actual measurement method and electronic simulation method commonly used to test the passive positioning performance of the interferometer system, and proposed a semi-physical simulation test method. This method uses the darkroom, turntable, array control system, flight simulation system and other equipment in the Key Laboratory of Radio Frequency Integrated Simulation of Avionics Systems to simulate the field test flight scene to conduct interferometer passive positioning simulation test experiments. However, the above test system needs to be carried out in a microwave darkroom, wireless signals need to be transmitted, and the antenna of the phase interferometer positioning system needs to be fully unfolded according to the design state. Considering the internal space of the actual microwave darkroom and the installation and unfolding of the antenna, this test method is not suitable for the case where the interferometer baseline is long.

[0005] The document "Design and Implementation of Semi-physical Test System for Real-time Processing on Satellite" [J]. Aerospace Electronic Countermeasures, 2022, 38(1): 31-35, in response to the demand for real-time processing on satellite payload subsystems, a test environment based on a semi-physical system for real-time processing on satellites was constructed for simulation verification of embedded software development on satellites, and automatic comparison and analysis of processing results to complete effect evaluation, providing support for reliable operation of satellites on orbit. However, this system simulates the output of intermediate frequency signals and can only test and verify the data processing capability of the digital end, but cannot test and verify the performance of the phase interferometer positioning system from the RF end, which has certain limitations. Summary of the invention

[0006] The purpose of the present invention is to provide a semi-physical test method and device for a satellite-borne phase interferometer positioning system in response to the problems existing in the prior art, which can calculate the phase difference and amplitude difference of the signal arriving at the phase interferometer positioning system in real time according to the satellite attitude and orbit, and then use a high-precision power adjustment matrix and phase shifter to perform high-precision amplitude and phase shifting on the signal, so that the amplitude-phase relationship of the multi-channel radio frequency signal arriving at the radio frequency front-end entrance of the interferometer positioning system is consistent with the actual on-orbit state. The present invention is suitable for desktop full-process test verification of the phase interferometer positioning system, especially for semi-physical verification of multi-beam large parabolic long baseline interferometer arrays that are difficult to implement air-fed tests in microwave darkrooms.

[0007] The technical solution of the present invention is as follows:

[0008] A semi-physical test device for a satellite-borne phase interferometer positioning system, comprising: a host computer software, a radio frequency amplitude and phase shifting network, and data receiving and interpretation software;

[0009] On the one hand, the host computer software simulates the real-time position and attitude of the satellite and the ground coverage area according to the satellite orbit parameters, and calculates the phase difference and amplitude difference of the interferometer channel according to the position of the ground target point and the tested phase interferometer positioning system simulation, and then generates the amplitude shift and phase shift control instructions for the radio frequency amplitude shift and phase shift network; on the other hand, according to the task requirements, the phase interferometer positioning system is configured with task parameters and control instructions are generated;

[0010] The RF amplitude shift and phase shift network is a hardware device that performs high-precision amplitude shift and phase shift according to the amplitude shift and phase shift control instructions generated by the host computer, so that the RF signal is consistent with the actual on-orbit state when it reaches the front-end entrance of the phase interferometer positioning system through the RF amplitude shift and phase shift network;

[0011] The data receiving and interpreting software receives the result data of the phase interferometer positioning system under test and caches it locally to form a file, and then interprets more useful and interesting information according to needs;

[0012] The host computer software and data receiving and interpretation software run on a dedicated ground inspection computer.

[0013] Furthermore, the host computer software is composed of a track simulation software module, an amplitude and phase calculation software module, a radio frequency network control software module and an interferometer instruction issuing software module.

[0014] Furthermore, the orbit simulation software module is used to simulate the satellite orbit, and when the satellite position and attitude angle are known, the beam coverage area on the ground is simulated according to the specific indicators of the satellite phase interferometer positioning system antenna array;

[0015] The amplitude-phase calculation software module first selects a specific position point in the beam coverage area, and then calculates the theoretical phase difference between the interferometer antenna signal phase detection channels and the theoretical amplitude difference between the multi-beam antenna signal detection channels according to the real-time orbital position and attitude of the satellite and the geometric relationship between the selected position;

[0016] The radio frequency network control software module realizes the conversion of the above-calculated amplitude difference and phase difference into a control file for the radio frequency phase shift network;

[0017] The interferometer instruction issuing software module realizes the task parameter configuration and task instruction issuing operations of the phase interferometer positioning system.

[0018] Furthermore, the RF amplitude and phase shifting network is composed of a RF power division network, a phase shifter, and a power adjustment matrix, which realizes power division, phase shifting, and amplitude shifting of the signal, so that the RF signal reaching the front-end entrance of the tested phase interferometer positioning system is consistent with the actual on-orbit situation.

[0019] Furthermore, the RF power division network first performs multi-channel power division and attenuation control on the RF signal from the radar simulation source according to actual design requirements; a part of the power-divided signal is output to the power adjustment matrix, and a part is output to the phase shifter;

[0020] The power adjustment matrix performs power division, power adjustment, and group output on the input radio frequency signal. The power adjustment parameters are performed according to the theoretical value of the amplitude difference calculated by the amplitude and phase calculation software module, and the grouping is performed according to the actual design requirements.

[0021] The phase shifter first performs power division on the input signal 1 as required, and then performs high-precision phase shifting on each power-divided signal according to the theoretical value of the phase difference calculated by the amplitude-phase calculation software module; at the same time, the input signal 2 is first power divided as required, and then performs high-precision phase shifting on each power-divided signal according to the theoretical value of the phase difference calculated by the amplitude-phase calculation software module; then the first signal of signal 1 after power division and phase shifting and the first signal of signal 1 after power division and phase shifting are combined and output, the second signal of signal 1 after power division and phase shifting and the second signal of signal 1 after power division and phase shifting are combined and output, and so on.

[0022] Furthermore, the data receiving and interpreting software comprises: a data receiving and caching software module and a data interpreting software module;

[0023] The data receiving and caching software module completes the reception of the result data of the phase interferometer positioning system under test and caches it locally to form a file;

[0024] The data interpretation software module interprets the received result data of the tested phase interferometer positioning system to obtain more useful and interesting information according to requirements.

[0025] The present invention also proposes a semi-physical testing method for a satellite-borne phase interferometer positioning system, based on the above-mentioned semi-physical testing device for a satellite-borne phase interferometer positioning system, comprising:

[0026] Step S1: Power on the ground inspection computer, power on the phase interferometer positioning system to be tested, open the host computer software, open the data receiving and interpretation software, and ensure that all equipment interfaces are correctly connected;

[0027] Step S2: In the satellite orbit simulation interface, input satellite orbit parameters, and output the satellite position, attitude angle, and beam coverage area of ​​the satellite phase interferometer positioning system on the ground in real time. The simulated output satellite position, attitude angle, and beam coverage area all change over time.

[0028] Step S3: Select the target point of interest in the instantaneous coverage area of ​​the beam according to the requirements and store it in a file, which contains the location information and signal parameters of the target table, and send the target parameters to the radar simulation source at the same time; it should be noted that the target point of interest can be static or mobile;

[0029] Step S4: In the amplitude and phase calculation interface, the phase difference between the interferometer channels and the amplitude difference between the initial direction finding channels are calculated in real time using the real-time position and attitude of the satellite and the position and frequency information of the target point in the coverage area;

[0030] Step S5: In the RF amplitude-shifting and phase-shifting network control interface, the phase difference and amplitude difference generated in step S4 are first converted into control parameters for the phase shifter and the power adjustment matrix respectively; in addition, the RF power division network control parameters are obtained by designing and testing the antenna array of the phase interferometer positioning system; and then the control parameters are respectively issued;

[0031] Step S6: Start the radar simulation source output signal; in the interferometer command issuing interface, configure the task parameters according to the requirements and execute the phase interferometer positioning task;

[0032] Step S7: Use data receiving software to receive the interferometer positioning results in real time and generate files according to the task number; use interpretation software to complete detailed analysis of the received data, compare the measured positioning results with the target position during simulation, and calculate the positioning CEP value and related evaluation functions.

[0033] Furthermore, the step S1 further includes:

[0034] The semi-physical test device is synchronized with the phase interferometer positioning system under test to ensure that all software and hardware devices start working at the same time.

[0035] Furthermore, the step S2 further includes:

[0036] Start the satellite orbit simulation software function some time in advance.

[0037] Furthermore, the location information in step S3 includes: longitude and latitude;

[0038] The signal parameters in step S3 include: frequency, repetition rate, pulse width, etc.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] 1. The present invention provides a semi-physical testing method and device for the satellite-borne phase interferometer positioning system, which solves the problem that the phase interferometer positioning system cannot realize the empty feed test in the microwave darkroom. Through the test of this device, the positioning test of the phase interferometer positioning system for various target scenes can be fully verified. The coverage area dimension includes positioning tests for targets within the coverage area, at the boundary of the coverage area, and even outside the coverage area. The signal pattern dimension includes but is not limited to positioning tests of PRI changes, frequency agility, frequency group changes, intra-pulse modulation and other styles. The signal parameter dimension includes tests of frequency, PRI, and pulse width changes within a wide range. In addition, it also supports verification of the positioning accuracy of the phase interferometer positioning system when the radiation source signal and the calibration signal exist at the same time.

[0041] 2. The method and device of the present invention are suitable for algorithm debugging, fault reproduction, performance evaluation and other tasks in the engineering development stage of phase interferometer positioning systems, and can be extended to the test and verification of phase interferometer positioning systems of other configurations. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a diagram of a semi-physical test device for a satellite-borne phase interferometer positioning system;

[0043] Figure 2 It is a block diagram of a radio frequency amplitude shifting and phase shifting network;

[0044] Figure 3 A block diagram of a radio frequency power division network;

[0045] Figure 4 A block diagram of a power adjustment matrix;

[0046] Figure 5 A block diagram of a phase shifter is provided;

[0047] Figure 6 The figure is a flow chart of a semi-physical testing method for a satellite-borne phase interferometer positioning system. DETAILED DESCRIPTION

[0048] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0049] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0050] Embodiment 1

[0051] See also Figure 1 , a semi-physical test device for a satellite-borne phase interferometer positioning system, comprising:

[0052] Host computer software, RF amplitude and phase shifting network and data receiving and interpretation software;

[0053] On the one hand, the host computer software simulates the real-time position and attitude of the satellite and the ground coverage area according to the satellite orbit parameters, and calculates the phase difference and amplitude difference of the interferometer channel according to the position of the ground target point and the tested phase interferometer positioning system simulation, and then generates the amplitude shift and phase shift control instructions for the radio frequency amplitude shift and phase shift network; on the other hand, according to the task requirements, the phase interferometer positioning system is configured with task parameters and control instructions are generated;

[0054] The RF amplitude shift and phase shift network is a hardware device that performs high-precision amplitude shift and phase shift according to the amplitude shift and phase shift control instructions generated by the host computer, so that the RF signal is consistent with the actual on-orbit state when it reaches the front-end entrance of the phase interferometer positioning system through the RF amplitude shift and phase shift network;

[0055] The data receiving and interpreting software receives the result data of the phase interferometer positioning system under test and caches it locally to form a file, and then interprets more useful and interesting information according to needs;

[0056] The host computer software and data receiving and interpretation software run on a dedicated ground inspection computer.

[0057] In this embodiment, specifically, the host computer software is composed of a track simulation software module, an amplitude and phase calculation software module, a radio frequency network control software module and an interferometer instruction issuing software module.

[0058] In this embodiment, specifically, the orbit simulation software module is mainly used to simulate the satellite orbit, and when the satellite position and attitude angle are known, the beam coverage area on the ground is simulated according to the specific indicators of the satellite phase interferometer positioning system antenna array;

[0059] The amplitude-phase calculation software module first selects a specific position point in the beam coverage area, and then calculates the theoretical phase difference between the interferometer antenna signal phase detection channels and the theoretical amplitude difference between the multi-beam antenna signal detection channels according to the real-time orbital position and attitude of the satellite and the geometric relationship between the selected position;

[0060] The radio frequency network control software module realizes the conversion of the above-calculated amplitude difference and phase difference into a control file for the radio frequency phase shift network;

[0061] The interferometer instruction sending software module realizes the operations such as task parameter configuration and task instruction sending of the phase interferometer positioning system.

[0062] In this embodiment, specifically, the RF amplitude and phase shifting network is composed of a RF power division network, a phase shifter, and a power adjustment matrix. Figure 2 As shown, power division, phase shifting and amplitude shifting of the signal are realized, so that the RF signal reaching the front-end entrance of the phase interferometer positioning system under test is consistent with the actual on-orbit situation; it should be noted that the consistency is mainly manifested in two aspects, one is that the phase characteristics of the RF signal reaching the interferometer channel must be consistent with the actual on-orbit state, and the other is that the amplitude characteristics reaching the initial direction finding channel must be consistent with the on-orbit state.

[0063] In this embodiment, it should also be noted that the RF amplitude shifting and phase shifting network supports simultaneous power division amplitude shifting and phase shifting processing of two signals, such as Figure 2 The signal 1 and signal 2 shown in the figure represent one signal each, corresponding to the application scenario where one calibration source and one radiation source (or two radiation sources) exist in the coverage area and need to be located. The RF amplitude and phase shifting network also supports the scenario where there is only one calibration source or radiation source in the scene. In this case, only signal 1 or signal 2 needs to be input, and no signal needs to be input to the other section.

[0064] Figure 2 The RF power division network simulates the power difference of the RF signal after passing through the initial direction finding antenna and the interferometer antenna; the power adjustment matrix simulates the impact of the initial direction finding antenna on the RF signal power, especially suitable for simulating the initial direction finding under the multi-beam reflector antenna; the phase shifter simulates the phase difference characteristics brought by the same RF signal reaching the interferometer antenna, especially suitable for multi-baseline interferometers.

[0065] In this embodiment, specifically, the RF power division network first performs multi-channel power division and attenuation control on the RF signal from the radar simulation source according to actual design requirements; a part of the power-divided signal is output to the power adjustment matrix, and a part is output to the phase shifter; the block diagram of the RF power division network is as follows: Figure 3 As shown;

[0066] The power adjustment matrix performs power division, power adjustment, and group output on the input radio frequency signal. The power adjustment parameters are based on the theoretical value of the amplitude difference calculated by the amplitude and phase calculation software module, and the grouping is carried out according to the actual design requirements. A power adjustment matrix composition block diagram is shown as follows: Figure 4 As shown in ; It should be noted that the grouping design is to save hardware resources and reduce the hardware complexity of the system, because the initial direction finding generally involves only a few antenna beams, and the remaining antenna beams can be considered to receive no signal; therefore, when designing the test system, it is only necessary to ensure that a few antenna beams have signal input at one time, and the remaining antenna beams can "copy" these beams, and only need to turn off the signal from the back end of the antenna;

[0067] The phase shifter first performs power division on the input signal 1 as required, and then performs high-precision phase shifting on each power-divided signal according to the theoretical value of the phase difference calculated by the amplitude-phase calculation software module; at the same time, the input signal 2 is first power divided as required, and then each power-divided signal is performed high-precision phase shifting according to the theoretical value of the phase difference calculated by the amplitude-phase calculation software module; then the first signal of signal 1 after power division and phase shifting and the first signal of signal 1 after power division and phase shifting are combined and output, the second signal of signal 1 after power division and phase shifting and the second signal of signal 1 after power division and phase shifting are combined and output, and so on; a block diagram of the composition of a phase shifter is shown in FIG. Figure 5 as shown in .

[0068] In this embodiment, specifically, the data receiving and interpretation software simulates the satellite-to-ground data transmission receiving function, and mainly realizes the reception and caching of high-speed result data. On the other hand, it performs data analysis, data statistics, graphic display, indicator compliance judgment, and generation of judgment files on the received high-speed data transmission result data according to the generated task file copy according to a specific interface protocol; specifically, it includes: data receiving and caching software module and data interpretation software module;

[0069] The data receiving and caching software module completes the reception of the result data of the phase interferometer positioning system under test and caches it locally to form a file;

[0070] The data interpretation software module interprets the received result data of the tested phase interferometer positioning system to obtain more useful and interesting information according to requirements.

[0071] See also Figure 6This embodiment further proposes a semi-physical testing method for a satellite-borne phase interferometer positioning system, based on the above-mentioned semi-physical testing device for a satellite-borne phase interferometer positioning system, comprising:

[0072] Step S1: Power on the ground inspection computer, power on the phase interferometer positioning system to be tested, open the host computer software, open the data receiving and interpretation software, and ensure that all equipment interfaces are correctly connected; synchronize the time of the semi-physical test device with the phase interferometer positioning system to be tested, and ensure that all software and hardware devices start working at the same time;

[0073] Step S2: In the satellite orbit simulation interface, input satellite orbit parameters (such as the number of six orbits, satellite's viewing angle to the ground and other parameters), and output the satellite's position, attitude angle and the beam coverage area of ​​the satellite phase interferometer positioning system to the ground in real time. The simulated output satellite position, attitude angle and beam coverage area are all changing with time, because the satellite is also always in motion (actual GEO satellites are actually maneuvering in a small range relative to the earth). It should be noted that the output results of this simulation software require a convergence time, and it is recommended to start this satellite orbit simulation software function 1 hour in advance.

[0074] Step S3: Select the target point of interest in the instantaneous coverage area of ​​the beam according to the demand and save it into a file. The file contains the location information (latitude and longitude) and signal parameters (frequency, repetition rate, pulse width, etc.) of the target table, and send the target parameters to the radar simulation source at the same time. It should be noted that the target point of interest can be static or mobile.

[0075] Step S4: In the amplitude and phase calculation interface, the phase difference between the interferometer channels and the amplitude difference between the initial direction finding channels are calculated in real time using the real-time position and attitude of the satellite and the position and frequency information of the target point in the coverage area;

[0076] Step S5: In the RF amplitude-shifting and phase-shifting network control interface, the phase difference and amplitude difference generated in step S4 are first converted into control parameters for the phase shifter and the power adjustment matrix respectively; in addition, the RF power division network control parameters are obtained by designing and testing the antenna array of the phase interferometer positioning system; and then the control parameters are respectively issued;

[0077] Step S6: Start the radar simulation source output signal; in the interferometer command issuing interface, configure the task parameters according to the requirements and execute the phase interferometer positioning task;

[0078] Step S7: Use data receiving software to receive the interferometer positioning results in real time and generate files according to the task number; use interpretation software to complete detailed analysis of the received data, compare the measured positioning results with the target position during simulation, and calculate the positioning CEP value and related evaluation functions.

[0079] Embodiment 2

[0080] This embodiment is aimed at a certain satellite-borne project, and adopts the above method to design and develop a semi-physical test device for a satellite-borne phase interferometer positioning system.

[0081] The initial direction finding channel of the device contains 5 beams, and the interferometer channel contains 9 beams. Figure 4 The middle power splitter is a 1-to-5 power splitter, and the combiner will use 5 2-input and 1-output combiners, and finally output 5 initial direction finding signals; the outputs of power splitters 1 to 4 are exactly the same, and each initial direction finding selects 1 from each of the power splitters 1 to 4 according to a specific rule to form 5 signal inputs. Figure 5 The power divider in the scheme is a 1-to-9 power divider, and the combiner will use 9 of them, and finally output 9 interferometer signals.

[0082] According to the task requirements, the orbit simulation module and amplitude-phase calculation module in the host computer software are used to calculate a set of amplitude difference and phase difference calculation results as shown in Table 1. 1-5 in Table 1 represents the phase difference between interferometer channel 1 and interferometer channel 5, 2-5 represents the phase difference between interferometer channel 2 and interferometer channel 5, and so on. The setting of the phase shifter is shown in Table 2. The phase value of channel 5 in Table 2 is set to 0° to facilitate the setting of the phase value of each interferometer channel according to the phase difference in Table 1. The final positioning result is shown in Table 3.

[0083] Table 1 Simulated target position and calculated phase difference

[0084]

[0085] Table 2 Phase shifter settings

[0086]

[0087] Table 3. Comparison of positioning results

[0088]

[0089] The above-mentioned embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the technical solution concept of the present application, and these all belong to the protection scope of the present application.

[0090] This background section is provided to generally present the context of the invention, and the work of the presently named inventors, the work to the extent described in this background section, and aspects of this section that did not constitute prior art at the time of application are neither explicitly nor implicitly admitted to be prior art to the present invention.

Claims

1. A semi-physical test device for a satellite-borne phase interferometer positioning system, characterized in that: include: Host computer software, RF amplitude and phase shifting network and data receiving and interpretation software; On the one hand, the host computer software simulates the satellite's real-time position and attitude and the ground coverage area according to the satellite orbit parameters, and calculates the phase difference and amplitude difference of the interferometer channel according to the ground target point position and the tested phase interferometer positioning system simulation, and then generates amplitude shift and phase shift control instructions for the radio frequency amplitude shift and phase shift network; on the other hand, according to the task requirements, the phase interferometer positioning system is configured with task parameters and control instructions are generated; The RF amplitude shift and phase shift network is a hardware device that performs high-precision amplitude shift and phase shift according to the amplitude shift and phase shift control instructions generated by the host computer, so that the RF signal is consistent with the actual on-orbit state when it reaches the front-end entrance of the phase interferometer positioning system through the RF amplitude shift and phase shift network; The data receiving and interpreting software receives the result data of the phase interferometer positioning system under test and caches it locally to form a file, and then interprets more useful and interesting information according to needs; The host computer software and data receiving and interpretation software run on a dedicated ground inspection computer.

2. A semi-physical testing device for a satellite-borne phase interferometer positioning system according to claim 1, characterized in that: The host computer software is composed of a track simulation software module, an amplitude and phase calculation software module, a radio frequency network control software module and an interferometer instruction issuing software module.

3. The semi-physical testing device for a satellite-borne phase interferometer positioning system according to claim 2, characterized in that: The orbit simulation software module is used to simulate the satellite orbit, and when the satellite position and attitude angle are known, the beam coverage area on the ground is simulated according to the specific indicators of the satellite phase interferometer positioning system antenna array; The amplitude-phase calculation software module first selects a specific position point in the beam coverage area, and then calculates the theoretical phase difference between the interferometer antenna signal phase detection channels and the theoretical amplitude difference between the multi-beam antenna signal detection channels according to the real-time orbital position and attitude of the satellite and the geometric relationship between the selected position; The radio frequency network control software module realizes the conversion of the above-calculated amplitude difference and phase difference into a control file for the radio frequency phase shift network; The interferometer instruction issuing software module realizes the task parameter configuration and task instruction issuing operations of the phase interferometer positioning system.

4. The semi-physical testing device for a satellite-borne phase interferometer positioning system according to claim 1, characterized in that: The RF amplitude and phase shifting network is composed of a RF power division network, a phase shifter, and a power adjustment matrix, which realizes power division, phase shifting, and amplitude shifting of the signal, so that the RF signal arriving at the front-end entrance of the tested phase interferometer positioning system is consistent with the actual on-orbit situation.

5. The semi-physical testing device for a satellite-borne phase interferometer positioning system according to claim 4, characterized in that: The RF power division network first performs multi-channel power division and attenuation control on the RF signal from the radar simulation source according to actual design requirements; a part of the power-divided signal is output to the power adjustment matrix, and a part is output to the phase shifter; The power adjustment matrix performs power division, power adjustment, and group output on the input radio frequency signal. The power adjustment parameters are performed according to the theoretical value of the amplitude difference calculated by the amplitude and phase calculation software module, and the grouping is performed according to the actual design requirements. The phase shifter performs power division on the input signal 1 as required, and then performs high-precision phase shift on each power-divided signal according to the theoretical value of the phase difference calculated by the amplitude-phase calculation software module; at the same time, the input signal 2 performs power division on the required first, and then performs high-precision phase shift on each power-divided signal according to the theoretical value of the phase difference calculated by the amplitude-phase calculation software module; Then the first signal after power division phase shifting of signal 1 and the first signal after power division phase shifting of signal 1 are combined and output, the second signal after power division phase shifting of signal 1 and the second signal after power division phase shifting of signal 1 are combined and output, and so on.

6. The semi-physical testing device for a satellite-borne phase interferometer positioning system according to claim 1, characterized in that: The data receiving and interpreting software includes: a data receiving and caching software module and a data interpreting software module; The data receiving and caching software module completes the reception of the result data of the phase interferometer positioning system under test and caches it locally to form a file; The data interpretation software module interprets the received result data of the tested phase interferometer positioning system to obtain more useful and interesting information according to requirements.

7. A semi-physical testing method for a satellite-borne phase interferometer positioning system, characterized in that: A semi-physical testing device for a satellite-borne phase interferometer positioning system according to any one of claims 1 to 6, comprising: Step S1: Power on the ground inspection computer, power on the phase interferometer positioning system to be tested, open the host computer software, open the data receiving and interpretation software, and ensure that all equipment interfaces are correctly connected; Step S2: In the satellite orbit simulation interface, input satellite orbit parameters, and output the satellite position, attitude angle, and beam coverage area of ​​the satellite phase interferometer positioning system on the ground in real time. The simulated output satellite position, attitude angle, and beam coverage area all change over time. Step S3: Select the target point of interest in the instantaneous coverage area of ​​the beam according to the requirements and store it in a file, which contains the location information and signal parameters of the target table, and send the target parameters to the radar simulation source at the same time; it should be noted that the target point of interest can be static or mobile; Step S4: In the amplitude and phase calculation interface, the phase difference between the interferometer channels and the amplitude difference between the initial direction finding channels are calculated in real time using the real-time position and attitude of the satellite and the position and frequency information of the target point in the coverage area; Step S5: In the RF amplitude-shifting and phase-shifting network control interface, the phase difference and amplitude difference generated in step S4 are first converted into control parameters for the phase shifter and the power adjustment matrix respectively; in addition, the RF power division network control parameters are obtained by designing and testing the antenna array of the phase interferometer positioning system; and then the control parameters are respectively issued; Step S6: Start the radar simulation source output signal; in the interferometer command issuing interface, configure the task parameters according to the requirements and execute the phase interferometer positioning task; Step S7: Use data receiving software to receive the interferometer positioning results in real time and generate files according to the task number; use interpretation software to complete detailed analysis of the received data, compare the measured positioning results with the target position during simulation, and calculate the positioning CEP value and related evaluation functions.

8. A semi-physical testing method for a satellite-borne phase interferometer positioning system according to claim 7, characterized in that: The step S1 further includes: The semi-physical test device is synchronized with the phase interferometer positioning system under test to ensure that all software and hardware devices start working at the same time.

9. The semi-physical testing method for a satellite-borne phase interferometer positioning system according to claim 7, characterized in that: The step S2 further includes: Start the satellite orbit simulation software function some time in advance.

10. The semi-physical testing method for a satellite-borne phase interferometer positioning system according to claim 7, characterized in that: The location information in step S3 includes: longitude and latitude; The signal parameters in step S3 include: frequency, repetition rate, and pulse width.

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