Abstract:

In satellite orientation, the deviation of the station position has a non-linear effect on the azimuth accuracy. In this paper, the mathematical model between the position deviation and the orientation bias in the local coordinate system is derived theoretically by using the coordinate transformation and the Taylor formula, the orientation bias caused by the position deviation is analyzed, and then the mathematical model is verified by using real measured data. The analysis results show that the effect of the position deviation on the orientation bias is related to the latitude and longitude of the station. The higher the latitude is, the larger the orientation bias caused by the same position deviation get. In the local coordinate system, the eastward position deviation is the main factor affecting the orientation bias, and the influence of the northward position deviation is negligible. The elevation difference of the baseline also affects the accuracy of orientation.

Key words: position deviation, satellite orientation bias, coordinate transformation, Taylor formula