A Theoretical Research for Laser Ranging Measurements Within Pico‐Second Level

Abstract With the improvement of observation technique's accuracy of space geodesy, theoretical model of Laser ranging should be adapted to predictable requirement of accuracy at present and in the future. Based on the basic principle of laser ranging, a relativistic theoretical model of laser ranging in BRS and GRS is put forward in this paper, the magnitude of gravitational time delay of the two models is estimated, theoretical formula of complete and consistent time scale and spatiotemporal coordination conversion is given meanwhile. According to the lastest conversion relation between BRS and GRS, we have deduced the relativistic theory model of laser ranging for GRS within pico‐second level, enlarged the applicable range of laser ranging model recommended by IERS.