Research of space debris laser ranging system

In order to monitor the space debris effectively, on the basis of 60 cm satellite laser ranging (SLR) system, the high repetition space debris laser ranging system was established with the multiple technologies, such as the real-time modification of time offset, the closed-loop tracking of debris target, the direction control of laser beam, the real-time correction of satellite forecast and so on, which was colocation observed at space SLR system. In 26 observation days, 466 passes and 26 passes in twilight were acquired, the observed elevation from 19 to 87 degree, ranging accuracy about 1 m, range from 400 km to 1 800 km, the minimum RCS can achieve to be 0.9 m2. By comparing with results from other observatories, the high repetition frequency rate DLR system has high precision, large observation range, small RCS, and more echo data, and the observed data is stable and reliable, which has reached the international advanced level.