Calibration and Wind Speed Retrieval for the Fengyun-3 E Meteorological Satellite GNSS-R Mission

China’s FengYun-3 E (FY-3E) meteorological satellite with the payload Global Navigation Satellite System Occultation Sounder II (GNOS II), which is the upgraded GNSS remote sensor of FY-3C and D satellites’ GNOS I, was launched on July 5
^th
, 2021. Sea surface wind speed(SWS) is the primary product of the Fengyun-3 E GNOS II’ new GNSS reflection (GNSS-R) functions. This paper reviews the new GNSS reflection functions of Fengyun-3E meteorological satellite GNOS II and introduces the preliminary GNSS-R level 1 calibration product and level 2 wind speed product.