GPS卫星定轨中的摄动力影响分析

The analysis of the perturbations on GPS orbit determination

分析了地球重力场、海洋潮汐、行星摄动、地极潮汐、相对论加速度等对GPS轨道拟合及轨道外推造成的影响,认为在GPS定轨中除了顾及地球重力场及海洋潮汐对卫星轨道影响之外,还应注意地球重力场模型及海洋潮汐模型的选用问题;此外,在短弧定轨可以不考虑行星摄动、地极潮汐以及相对论加速度的影响,但长弧定轨中需考虑它们的影响。

This paper analyzed the perturbation influences of geopotential,ocean tide,planet attraction,pole tide,general relativistic acceleration correction on GPS satellite orbit.It recommended that not only the effects of geopotential and ocean tide should be taken into account,but also the mode selections should be considered.Although the effects of planets attraction, pole tide,general relativistic acceleration correction could be overlooked in the short-arcs,but in long-arcs,these effects mentioned above should be taken into account.