Method for correcting positioning errors by means of wide area weighting of pseudorange differentials
A pseudo-range error and positioning error technology, which is applied in the field of correction of positioning error of wide-area weighted pseudo-range differential pair, can solve problems such as large positioning error and inaccurate positioning, and achieve the effect of improving the scope of application, accurate positioning and high positioning.
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Embodiment 1
[0017] The implementation of the wide-area weighted pseudorange differential method in this embodiment involves three parts: six differential reference stations in China, one user, and pseudorange differential accuracy simulation.
[0018] The pseudo-range differential accuracy simulation is mainly to compare the pseudo-range error caused by the simulated ephemeris error and ionospheric error at the user's location with the wide-area weighted pseudo-range correction of the virtual reference station at the user's location to obtain the pseudo-range differential positioning accuracy.
[0019] Set up 6 pseudo-range differential reference stations in China, that is, N is 6, located in Xi'an, Changchun, Kashi, Sanya, Shanghai, and Lhasa. The time of each station is synchronized with the coordinated universal time of the National Time Service Center, and a common-view receiver is placed in each station. Chengdu users are selected for simulation. The satellite is selected as the Asi...
Embodiment 2
[0031] In the above-mentioned embodiment 1, 9 pseudo-range differential reference stations are set up in China, that is, N is 9, which are respectively located in Xi'an, Changchun, Kashi, Sanya, Shanghai, Lhasa, Hohhot, Beijing, and Xiamen, and Chengdu users are selected for simulation. The satellite is selected as the Asia-Pacific 1A satellite, and the position of the satellite within one day on August 2, 2009 is used as the actual position of the satellite, and the actual position plus a certain error is used as the broadcast ephemeris. In one day, the ephemeris x-direction error is set to: The ephemeris y-direction error is set to The ephemeris z-direction error is set to When t is a place, taking the ephemeris error A=10 meters as an example, the correction method of the wide-area weighted pseudorange difference to the positioning error comprises the following steps:
[0032] (1) Nine pseudorange differential reference stations, namely Xi'an, Changchun, Kashi, Sanya, ...
Embodiment 3
[0042] In the above-mentioned embodiment 1, 8 pseudo-range differential reference stations are set up in China, that is, N is 8, respectively located in Changchun, Kashi, Sanya, Shanghai, Lhasa, Hohhot, Beijing, and Xiamen, and Chengdu users are selected for simulation. The satellite is selected as the Asia-Pacific 1A satellite, and the position of the satellite within one day on August 2, 2009 is used as the actual position of the satellite, and the actual position plus a certain error is used as the broadcast ephemeris. In one day, the ephemeris x-direction error is set to: The ephemeris y-direction error is set to The ephemeris z-direction error is set to When t is a place, taking the ephemeris error A=10 meters as an example, the correction method of the wide-area weighted pseudorange difference to the positioning error comprises the following steps:
[0043] (1) Eight pseudo-range differential reference stations, namely Changchun, Kashgar, Sanya, Shanghai, Lhasa, Hoh...
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