天基单星测角跟踪条件下的空间非合作目标定轨

Orbit Determination of Non-Cooperative Space Target with Space-Based Single-Satellite Angle Tracking

针对天基单星测角跟踪条件下的空间目标定轨问题,给出了空间目标的可探测条件,提出了基于超短弧稀疏光学跟踪数据的空间群目标天基定轨方法,建立了低轨监测星对高轨非合作式光学跟踪测量模型和定轨模型,围绕非合作式空间群目标天基单星仅测角跟踪定轨的收敛性和精度开展了定轨试验,结果表明联合两段短弧数据定轨半长轴,精度可达百米量级。

The problem of orbit determination（ OD） for non-cooperative space target（ NCST） is focussed under the conditions of single-satellite angle tracking. The detectable condition of space target is given at first. Then,a combined OD method for space group targets based on space-based sparse optical tracking data is proposed. The non-cooperative optical tracking measurement models and the OD estimating methods of the low earth orbit（ LEO） platform monitoring geostationary orbit（ GEO） targets are established. The multi-satellite combined OD tests are implemented. And the results show that precision of the semi-major axis at level of 100 meters is achieved when combination of two short arc data is using.