Abstract:

The deployment of a large number of loworbit constellations that will complete in the future has higher requirements for traditional space surveillance. The wideangle optical telescope system can monitor a wide area and observe more objects at the same time. However, most of the observation sequences are “short arc” observations, and a single sequence cannot determine the initial orbit of a space object. The current effective solution is to accurately correlate the optical observation arcs and fuse multiple observations for initial orbit determination. The orbits of two short arcs are optimized based on the admissible region method and the chisquare test is combined to determine the correlation between different observations. Secondly, the illposed problems are described for loworbit satellites in detail when anglesonly observations is used for correlation. Finally, given the high error rate of the loworbit object shortarc correlation, a method is proposed for identifying the wrong correlation based on the angular error characteristics.

Key words: short arc correlation')">

short arc correlation, angles only, ill conditioned, admissible region, error characteristic