 The thermal infrared spectrometer onboard SDGS-80-1 is a crucial sensor for the 2030 agenda for sustainable development, and field campaigns were conducted from January to December 2022 to evaluate its radiometric calibrations. A radiance-based calibration method was used to derive the spectral radiance of lake surfaces around the satellite overpass using a boat-deployed spectrometer or radiometer. The results showed that the average brightness temperature bias reached 0.772K, minus 1.032K, and minus 0.300K in bands 1, 2, and 3, respectively, with RMSEs of 1.00, 1.10, and 0.43K. 80% of the field experiments achieved a high calibration accuracy with temperature biases of less than 1K, and the calibration accuracy of band 3 was better than that of other bands. Atmospheric conditions and surface characterization play important roles in determining calibration accuracy through surface observations and atmospheric transfer simulations. Periodic field experiments are needed to monitor and improve the operational radiometric calibration of satellite instruments to create high resolution and reasonable scientific data sets. This article was authored by Yang Honghu, Xiao Mingli, Chen Yongdo, and others. We are article.tv, links in the description below.