The Status and Progress of Fengyun-3e GNOS II Mission for GNSS Remote Sensing.

Global Navigation Satellite System Occultation Sounder. (GNOS.) is an integrated GNSS remote sensing instrument which combines POD (Precise Orbit Determination), GNSS Radio Occultation (GNSS-RO) and GNSS Reflectometry (GNSS-R). It will provide more and higher quality radio occultation data and new reflected GNSS signal Delay Doppler Mapping (DDM), compared with its predecessor GNOS which were used in FY3C and FY3D satellites. GNOS. will be used on-board FY3E satellite since 2020 to monitor the ionosphere, neutral atmosphere, sea wave and wind field of earth. This paper presents the latest status and progress of Fengyun-3E GNOS.mission. Main features and parameters of the GNOS., especially the improvements during the development of the GNOS. Flight Model, are illustrated.