LAUSR

The lunar surface temperature (LST) is one of the important thermophysical parameters of the Moon, which helps to study the radiative properties of the lunar surface. Thermal infrared emission spectra are sensitive to the thermophysical properties of the lunar surface material, and the emissivity data can be used for lunar surface composition inversion. In the past, humans have conducted hundreds of lunar exploration missions, but only a small number have been conducted in the infrared band, and typical examples include the Apollo program and the Diviner lunar radiometer experiment of the LRO satellite. Only part of the lunar surface has been explored by these missions. Sustainable Development Goals Satellite-1 (SDGSAT-1) carries out a complete observation of the lunar surface in three infrared wavelength bands (B1: 8– $10.5~\mu \text{m}$ , B2: 10.3– $11.3~\mu \text{m}$ , and B3: 11.5– $12.5~\mu \text{m}$ ) by its thermal imager spectrometer as part of its mission. In this study, the temperature-emissivity separation (TES) algorithm is used to retrieve the LST and calculate the thermal infrared band emissivity using the radiometric data obtained by SDGSAT-1 thermal imager spectrometer, and the temperature distribution of full-disk Moon and the emissivity distribution of three bands are also mapped. The temperature retrieval error is verified less than 1 K.