CAJ | 학술논문

论述了SST-LL重力测量卫星科学任务对轨道寿命、地面覆盖性能、轨道高度单圈波动、星间距离变化范围的需求。根据需求，计算了轨道的自然衰减情况，得l出轨道初始高度为500km；综合考虑地面覆盖要求及运载火箭能力，得出了最佳轨道倾角为89°；得出了0．0020偏心率下轨道高度波动范围不超过50km；分析得出星间距离的长周期变化主要受大气阻力影响，初步确定了轨道控制方案，即定期对受大气阻力较大的卫星进行轨道机动。
논술료SST-LL중력측량위성과학임무대궤도수명、지면복개성능、궤도고도단권파동、성간거리변화범위적수구。근거수구，계산료궤도적자연쇠감정황，득l출궤도초시고도위500km；종합고필지면복개요구급운재화전능력，득출료최가궤도경각위89°；득출료0．0020편심솔하궤도고도파동범위불초과50km；분석득출성간거리적장주기변화주요수대기조력영향，초보학정료궤도공제방안，즉정기대수대기조력교대적위성진행궤도궤동。
The needs of scientific targets of the low-low satellite-to-satellite tracing （SST-LL） gravity exploring satellite for the orbit life, ground-coverage, altitude variation range in one circle and distance between two satellites are considered. According to the needs, the aerodynamic loss and the optimal in- clinations are computed. As a result, the initial altitude should be 500kin and inclination of 89°would be the best choice for the ground-coverage and launch vehicle. The altitude variation range is less than 50km with the eccentricity 0. 0020. The main cause of the distance variation between two satellites is aerody- namic drag, and the control strategy of the distance variation is analyzed, such as periodic orbit maneuver for the satellite which sufferes higher aerodynamic drag.