The equation of satellite orbital motion was derived in the conventional terrestrialcoordinate system.
推导了协议地球坐标系下的卫星运动方程。
2
The coordinate reference datum on which precision GPS survey is based, is ITRF International Terrestrial reference Frame that IERS offers.
高精度GPS测量所依据的坐标参考基准，是由IERS所提供的ITRF国际地球参考框架。
3
It is an important mission of Geodesy to improve an accuracy of control networks and to establish the geocentric coordinate system via combined satellite and terrestrial network adjustment.