MODELING AND PRECISE ORBIT DETERMINATION IN SUPPORT OF GRAVITY MODEL DEVELOPMENT FOR THE GRAIL MISSION

摘要

New and improved models of the lunar gravity field to 420x420 in sphericalharmonics have been derived from the analysis of the Gravity Recovery AndInterior Laboratory (GRAIL) intersatellite Ka-band tracking data. We discussthe measurement and force modeling applied to the analysis of the GRAIL datafrom the primary mission (March 1 to May 29, 2012), and the strategies chosento develop the high degree solutions. We summarize the quality of thegravity models developed and their impact on GRAIL precision orbit determination.