Yaogan (in full Yaogan Weixing (遥感卫星), "Remote Sensing Satellite"; sometimes written YaoGan) refers to a series of Chinese reconnaissance satellites launched in the early 21st century. Chinese media describe the satellites as intended for "scientific experiments, land survey, crop yield assessment, and disaster monitoring". Western analysts suspect that they are also used for military purposes. Analysts believe that each satellite employs either optical or synthetic aperture radar (SAR) sensors and that the SAR satellites are of the Jian Bing-5 series.