探测双星轨道演变及定轨精度分析  

Orbit Evolvement and Precision Analysis for Chinese TC-1 and TC-2 Satellites

作　　者：吴功友[1] 赵长印[1] 张荣之[2] 王家松[2] 汪宏波[1] 

机构地区：[1]中国科学院紫金山天文台,南京210008 [2]西安卫星测控中心,西安710043

出　　处：《天文学报》2007年第3期355-363,共9页Acta Astronomica Sinica

摘　　要：探测双星是中国目前在轨运行的大椭圆轨道卫星.自发射以来,双星轨道不断演变,对定轨和预报精度产生了一定影响.定性定量地分析了探测双星的轨道演变规律.在当前的跟踪模式下,根据轨道演变的不同阶段分析了相应的定轨预报精度,从而为卫星应用部门调整计划模式,确保卫星有效载荷正常提供依据.最后,通过轨道演变的趋势预测了双星的轨道寿命.TC-1 was launched on December 30th 2003 and TC-2 was launched on July 25th 2004. They are two operational satellites with very high orbit eccentricities. The two satellites operate closely with the ESA Cluster-Ⅱ Spacecraft to form a stereo six-point simultaneous detection in geo-space and to observe and study the mechanism of trigger and development of disturbances in near-Earth space weather. Because of dynamic perturbation, the orbits of TC-1 and TC-2 have been changing since launch date. In this paper the characteristics of orbit evolvement for these two satellites are investigated. Mainly due to solar gravitation and lunar gravitation, the eccentricities of TC-1 and TC-2 change in long period, which result in the changing of perigee. The atmospheric density at 230 km altitude is about thousand times larger than it at 700 km, which makes different accuracy level for orbit determination and prediction in different time. So the precision of orbit determination and prediction for TC-1 and TC-2 on different stage are analyzed. The plan mode of satellite application can be adjusted according to the satellite perigee to ensure the normal operation of the payload. Some vital change about orbit element of the two satellites in further is also given, the orbit lifetime is assessed based on the evolvement of satellite perigee in the end.

关 键 词：卫星 个别 天体力学 轨道计算和定轨 

分 类 号：P133[天文地球—天体力学]