GNSS STANDARD POINT POSITIONING METHOD BASED ON SPHERICAL HARMONICS

The present invention belongs to the field of satellite navigation and positioning technology, more specifically a GNSS standard point positioning method based on the spherical harmonics. The method achieves the calculation of the station position with GNSS observations and satellite broadcast ephemeris. In this method, spherical harmonics are used to describe the errors related to the elevation and azimuth angle between the station and the satellite, including tropospheric delay errors and ionospheric delay errors. Compared with the existing methods of correcting the tropospheric delay by using empirical models, the method in the present invention can obtain the position information of survey points quickly and with high efficiency and present advantages such as a simple practical performance, a convenient data process and high calculation efficiency.