Construction method of fusion positioning and navigation timing calculation model considering the deviation between satellite navigation systems
A technology of satellite navigation system and calculation model, which is applied in the field of satellite surveying, mapping, navigation and positioning, can solve problems such as user confusion, disregard of the influence of deviations between systems, and lack of precision, and achieve improved navigation and positioning accuracy and reliability, strong operability, Improve the effect of calculation effect
Active Publication Date: 2019-03-29
中国人民解放军61540部队
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[0008] The above two methods have their own obvious shortcomings. Although the fusion algorithm based on the navigation and positioning results of each navigation system is relatively simple, it does not consider the influence of the deviation between the systems on the results; while the tight combination algorithm based on the original observations of each navigation system is Theoretically, it is stricter and the result is more reliable, but there are multiple receiver clock errors, and the observations of several satellite systems have several clock errors. These clock errors are often different, which causes confusion for users. , and the accuracy is still lacking in actual use
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Embodiment 1
[0045] Firstly, the inter-system deviation of GPS relative to BDS of the same type of GNSS compatible receiver is calibrated.
[0046] The first step is to collect observation data, place the GNSS compatible receiver at a stationary station with coordinates of a few centimeters to collect 30S BDS / GPS data, including GNSS observation raw data and GNSS ephemeris;
[0047] The second step is to calculate the O-C observations, use the BDS / GPS observation raw data of the station, use the observation epoch and the distance observations in the observation data to interpolate the satellite position at the time of satellite signal transmission, after various atmospheric corrections and satellite clock differences Correction and other error correction, calculation of O-C observations
[0048] The third step is to calculate the deviation parameters between systems.
[0049] ①The observatory has high-precision coordinates, and its point coordinates are given strong constraints, and the p...
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The invention provides a method for constructing a fusion positioning, navigation and timing calculation model considering the deviation between satellite navigation systems. The steps are: calibration of the deviation between the systems of the satellite navigation system and the Beidou satellite navigation system; The error equation or constraint conditions of the deviation between the systems, the construction of a fusion positioning, navigation and timing calculation model that takes into account the deviation between satellite navigation systems, and the results are tested, can realize the high-precision fusion positioning and timing of the Beidou satellite navigation system and other satellite navigation systems, and obtain Unified navigation and positioning results, the only receiver clock error and the inter-system deviation relative to the Beidou satellite navigation system, especially in the special environment with limited number of visible satellites, can achieve the calculation effect of improving the accuracy and reliability of navigation and positioning, and can be operated It is more robust, easy to popularize and realize, and has broad industrial application prospects.
Description
technical field [0001] The invention relates to the technical field of satellite surveying, mapping, navigation and positioning, and in particular to a method for constructing a fusion positioning, navigation and timing calculation model in consideration of deviations between satellite navigation systems. Background technique [0002] At present, there are mainly GPS, GLONASS, Galileo, BeiDou Navigation Satellite System (BDS for short) and other Global Navigation Satellite System (GNSS for short) systems in the world, as well as augmented systems in India and Japan. [0003] Since the multi-satellite navigation system significantly increases the amount of satellite observations visible to users, it greatly improves the continuity, reliability and accuracy of navigation and positioning. The integrated navigation and positioning of multiple GNSS has become the main trend of GNSS application. [0004] However, since each navigation satellite system is dominated by different co...
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IPC IPC(8): G01S19/33G01S19/23G04R20/02
CPCG01S19/23G01S19/33G04R20/02
Inventor 曾安敏吴富梅
Owner 中国人民解放军61540部队