Monitoring of the Moon as the Natural Satellite of the Earth in the Solar System

A monitoring of the gravity on the surface of the Moon was undertaken by a surveyor. A geodetic concept seems to be helpful at considering the internal structure of the Moon. The author introduces a model of the Moon which is consisted by a core covered by a spherical surface layer. Referring to the NASA data, the author noted about what is introduced the lunar gravity on the Moon surface to see what is suggested by the monitored lunar gravity field centering though the Moon is on the lunar orbital motion.