A Lunar Surface Temperature Model With Topography And Rock Abundance And Its Verification By Observations From Diviner Infrared Radiometer

With the rapid development of science and technology,human’s exploration of the universe has gradually entered a new stage.Human’s exploration of the Earth satellite Moon is of great significance.On the one hand,it can provide important reference value for the exploration of other planets,and on the other hand,it provides a possibility for solving the energy crisis faced by human beings.One of the goals of lunar exploration is to study the physical temperature distribution on the lunar surface.From the detection of the lunar surface temperature,it was found that there are a large number of temperature anomalies on the lunar surface at midnight.Due to the difference of physical and chemical properties between the lunar surface rocks and regolith,the lunar surface rocks will play a significant role on the thermal characteristics of the lunar surface.Therefore,the rocks must be taken into account in the analysis of lunar surface thermal characteristics.In this paper,the finite difference method is used to solve one-dimensional heat conduction equation model to get the lunar surface temperature.In order to take the topography and rock abundance into consideration,this paper needs to calculate the horizontal and vertical slope of the location from the elevation data,and then calculate the real-time incidence angle.In order to get the diurnal temperature change of pure rocks with time and depth,we refer to Bandfield et al.’s research results on physical and chemical properties of foam basalt to establish one-dimensional heat conduction equation of,and obtain the distribution of rock temperature change.By the surface temperature of pure rock and the regolith,with topography and the rock abundance obtained by Bandfield et al.considered,the simulated surface temperature can be obtained.In this paper,midnight(23:00--1:00)measurements from Diviner Channel 8 in 2010 and 2011 were extracted.In this paper,firstly,the diurnal temperature simulation at lunar equator is compared with the measured data,and it is found that the simulation results can match the measured temperature well at midnight.Secondly,to verify the temperature model,we extract the midnight measured data of Copernicus,Langrenus,Eudoxus,Taruntius,Plinius,Stearnus,Aristillus,Werner,and Coriolis craters respectively and compare them with the corresponding simulation results,and it is found that the simulated temperature of the corresponding craters can be well matched with the measured data.Finally,we extended the study range to the whole lunar surface,and compared the simulated temperature of the whole lunar surface with the Diviner midnight measured data of 8channels,and it is found that the simulation results were consistent with the measurements.Although there are still some shortcomings in the research work in this paper,it lays a certain foundation for the subsequent research on the lunar physical temperature model and other theories,and has important significance for solving the accurate lunar deep physical temperature and the lunar surface microwave bright temperature simulation.