Determining Orbit of COMPASS-M1 Using International Laser Ranginge Data

COMPASS-M1 satellite orbits with different arc lengths are determined based on SLR-only data collected from the ILRS tracking network. Orbit overlaps and range residuals are derived to assess the orbit quality. SLR-based orbits of 19 days arc length are determined with an accuracy of about 0.207 m in radial orbit component,2.28 m in 3D position,and 0.25 m in radial orbit component,2.75 m in 3D position after 1 day of prediction.