POS system double-strapdown calculating post-processing method based on R-T-S smoothness
A technology of R-T-S and POS systems, applied in radio wave measurement systems, satellite radio beacon positioning systems, measurement devices, etc., can solve the problem of low error parameter estimation accuracy, achieve the effect of reducing errors and improving POS accuracy
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[0017] A post-processing method of dual strapdown solution based on RTS smoothing of POS system is mainly divided into three parts: The first part is to perform Kalman filter solution to obtain the strapdown solution result and Kalman filter required for smoothing at each GPS sampling point parameter. The second part is to use the R-T-S smoothing method to estimate the smooth output of the state error at each GPS sampling point. The third part is to use two-way strap-down solution to realize the POS output in the adjacent filter interval on the basis of the smooth output of GPS sampling points.
[0018] The specific implementation steps of the present invention are as follows:
[0019] (1) Collect inertial measurement data and GPS base station data and GPS rover data output by the POS system during flight test or vehicle test;
[0020] (2) Perform temperature error compensation on the inertial measurement data obtained in step (1), and the compensated inertial data includes three-a...
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