利用两站准同步激光测卫资料精确测定基线

ACCURATE ESTIMATION OF BASELINES WITH QUASI-SIMULTANEOUS OBSERVATIONS FROM TWO STATIONS

本文介绍了利用两个激光测卫站的同步资料,采用半动力半几何方法测定两激光站的基线长。该方法可以消除地球定向参数(EOP)误差对基线测定的影响,可以最大限度地减少卫星定轨误差对基线测定的影响。利用该方法,Lageos卫星定轨误差对长度小于1000公里的基线的影响可降到原来的十分之一以下。因此本方法可用于精确测定两站基线长,可用于研究局部地区板块运动。

The semi-dynamic and semi-geometric satellite method is introduced. In this method, quasi-simultaneous observations from two stations are transformed into simultaneous range differences. It can be anticipated for a baseline about 1000 km in length to reduce the effects of orbital and observational residual biases by a fator of 10. The baseline estimated via this method are free of errors affecting the orbit and the realization of the Terrestrial Reference Frame (TRF). Adjustment for the earth orientation parameters is not necessary since proper realization of the TRF is guaranteed by the use of quasi-simultaneous observations. The method is very efficient and at least as accurate as the more complicated dynamic methods.