Helium-3(3He) implanted by solar wind in the lunar regolith is a valuable resource because of its potential as a fusion fuel.On the basis of the Apollo regolith samples,a linear relationship between 3He abundance and solar wind flux,optical maturity and TiO2 content has been presented.China successfully launched its first lunar exploration satellite Chang-E 1(CE-1) on October 24,2007.A multi-channeled microwave radiometer was aboard the satellite with the purpose of measuring microwave thermal emission from the lunar surface layer.From the multi-channel brightness temperature(Tb) observed by CE-1,the global distribution of the regolith thickness was inverted from the multi-channel Tb,and was used to evaluate the total amount of 3He per unit area in the lunar regolith.The global inventory of 3He was estimated as being 6.6×108 kg;3.7×108 kg for the lunar nearside and 2.9×108 kg for the lunar farside.
选取 Apollo 15登陆点附近月海地区与赤道月陆地区,由一维热扩散方程,并由Diviner红外观测数据验证,确定这些地区在各月球时刻的月壤层物理温度廓线.通过CE-1与CE-2四通道微波辐射计观测的辐射亮度温度数据,由辐射传输数值模拟,用最小二乘法反演各通道月壤层热发射率和介质层吸收系数,由此反演月壤层的微波有效复介电常数,并得到全天时各通道微波热辐射的变化,及其与CE-1,CE-2观测数据的比较与验证.
