Residual correction method for tropospheric delay in nwp inversion under multi-factor constraints
A tropospheric delay and multi-factor technology, which is applied in the direction of instruments, measuring devices, satellite radio beacon positioning systems, etc., can solve the problems of poor accuracy of tropospheric delay, achieve the effects of improving positioning accuracy, shortening convergence time, and improving estimation accuracy
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Embodiment 1
[0035] The first step is to obtain the ZTD of SCIP station and ROCK station for consecutive years in 2015 on the IGS MGEX website, record it as IGS_ZTD, and eliminate gross errors.
[0036] In the second step, in the ERA-Interim (Jan1979-present) product of the reanalysis data of the European Center for Mesoscale Weather Forecasting (ECMWF), obtain a plane resolution of 0.125°×0.125°, a vertical resolution of 37 layers, and a time resolution of It is the 6-hour layered meteorological data of SCIP station and ROCK station area in 2015. The meteorological parameters include air pressure, temperature, relative humidity and geopotential height.
[0037] The third step is to use the integration method to invert the regional meteorological data of SCIP station and ROCK station to obtain the ZTD of SCIP station and ROCK station in 2015, which is recorded as NWP_ZTD. The calculation formula of ZTD inversion by layered integration method is:
[0038]
[0039] where ZTD grid is the...
Embodiment 2
[0051] The first step is to obtain the ZTD of PIN1 station and ROCK station for consecutive years in 2015 on the IGS MGEX website, record it as IGS_ZTD, and eliminate gross errors.
[0052] In the second step, in the ERA-Interim (Jan1979-present) product of the reanalysis data of the European Center for Mesoscale Weather Forecasting (ECMWF), obtain a plane resolution of 0.125°×0.125°, a vertical resolution of 37 layers, and a time resolution of It is the 6-hour layered meteorological data of PIN1 station and ROCK station area in 2015. The meteorological parameters include air pressure, temperature, relative humidity and geopotential height.
[0053] The third step is to use the integral method to invert the regional meteorological data of PIN1 station and ROCK station to obtain the ZTD of SCIP station and ROCK station in 2015, which is recorded as NWP_ZTD. The calculation formula of ZTD inversion by layered integration method is:
[0054]
[0055] In the above formula: ZTD...
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