基于Chang'E-1卫星LAM数据的月表温度分布研究

Lunar surface temperature is one of the essential parameters for the exploration of the Moon. In this paper, the surface temperature model, Racca model, is improved according to the Moon topography features. Slopes in the longitude and latitude directions are considered in the temperature model and estimated with the digital elevation data from Laser Altimeter (LAM) instrument onboard Chang'E-1 satellite and the Horn algorithm. The results indicate that the distribution of the temperature is heavily affected by the fluctuation of the Moon surface. The variation of surface temperature becomes bigger with the distance from the measured point to the subsolar point becoming further and with the change of elevation. The influence of the topography on the temperature is regional. The highest temperature for any point over the Moon surface is simulated and the distribution of the abnormal temperature is studied based on the simulation results.