针对GPS、卫星激光测距(satellitelaserranging, SLR)和天线电定位(dopplerorbitographyandradiopositioningintegratedbysatellite, DORIS)3种不同的观测手段,讨论姿态模型误差对定轨的影响,以SLR验证、轨道重叠和外部轨道对比3种方法评定无姿态数据条件下的定轨精度,并基于该结果讨论不同轨道叠加方法的效果.以Jason-2卫星为例,在详细讨论GPS、SLR和DORIS的定轨策略基础上并基于实测数据进行了试验,试验结果表明, Jason-2卫星姿态模型误差对DORIS、GPS和SLR轨道影响分别为0．040m、0．036m和0．033m；无姿态数据定轨时, DORIS定轨结果略优于GPS和SLR, SLR定轨精度略差；基于轨道重叠结果加权,对GPS、SLR和DORIS轨道进行轨道叠加可以达到比较好的效果,通过与JPL轨道比较,其轨道径向精度可优于2cm.%By using three different observation technologies, GPS, SLR and DORIS, the effect of attitude model error on orbit was discussed and the accuracy of orbit determination without the attitude data upon three methods, SLR validation, orbit overlap and external orbit comparison was assessed in this paper. Based on which, further analyses are made on the effect of different orbit stacking method.Taking Jason-2 for instance,after detai led discussion on the strategy of orbit determination of GPS,SLR and DORIS, theexperiment by using observational data was carried out.The results show that the influence of attitude model error of Jason-2 on orbit determined by DORIS,GPS and SLR are respectively 0.040 m、0.036 m and 0. 033 m.When determine the orbit without attitude data,the orbit determined by DORIS is slightly better than that by GPS and SLR,whi le that by SLR is more or less the worse.When combining the orbits determined by GPS,DORS and SLR by using the weight based on result of orbit overlap,a better result will be got.When comparing it with JPL orbit,it shows that the radial accuracy of the former can be better than 2 centime-ters.
展开▼
