The improvements of Chang’E series satellites orbit determination from GRAIL lunar gravity model
Abstract
Here we analyze different features between the gravity models of GL0420A and LP165P, including the cross-power spectra of gravity and lunar free-air gravity anomaly. The results show that GL0420A has greatly improved the order and the accuracy of the lunar gravity model, and GL0420A can better reveal the characteristics of the moon. Orbit determination for Chang’E series lunar probe at 100 km×100 km and 100 km×15 km orbit phases is performed with different gravity field models. The results show a better orbit solution with 10 m-level improvement that can be obtained using GL0420A and the solution is more suitable for high accuracy orbit determination for lunar probes.
