From April 19 to 20, the global first infrared hyperspectral surface emissivity field observation experiment on the typical underlying surface of the eastern Qinghai-Tibet Plateau was carried out in Guoluo Tibetan Autonomous Prefecture, Qinghai. This experiment is a subject of the second comprehensive scientific expedition to the Qinghai-Tibet Plateau. By collecting infrared hyperspectral surface emissivity of different typical underlying surfaces, it provides key parameters for the application of infrared hyperspectral data assimilation of satellites in the Qinghai-Tibet Plateau region.

According to Han Wei, a researcher at Center for Earth System Modeling and Prediction of China Meteorological Administration (CMA), satellite data assimilation on the Qinghai-Tibet Plateau faces many challenges, among which the imperfect physical model of surface emissivity and the inaccuracy of the data set are key problems. In the Qinghai-Tibet Plateau region, a large number of satellite detection channel data is affected by the plateau surface.

The field observation experiment of hyperspectral emissivity was carried out Photoed by Zhang Yibo

Nowadays, satellite infrared hyperspectral observation requires higher precision of surface emissivity. The experimenters mainly carried out observation experiments on the alpine meadow, glacier and snow cover in the eastern Qinghai-Tibet Plateau, and the data collected by the ground-space integrated cooperative observation, such as the mobile vehicle-mounted microwave radiometer, Unmanned Aerial Vehicle (UAV) observation and FENGYUN meteorological satellite infrared hyperspectral observation, will be used for the project research.

Editor: Liu Shuqiao