Measurements and Applications
The GEMS instrument onboard FY-4M conducts atmospheric, land surface and oceanic observations within the frequency band of 23.8–425 GHz. Its applications cover global and regional numerical weather prediction, monitoring of severe weather such as typhoons, as well as land and marine environmental monitoring.
Full Name
GEostationary Microwave Sounder
Status
Being developed
Instrument Agencies
Maturity
Instrument Type
Imaging multi-spectral radiometers (passive microwave) 
Geometry
Conical scanning
Instrument Technology
Absorption-band MW radiometer/spectrometer
Sampling
Sounding
Data Access
No Access
Data Format
Resolution
60km for 50-60GHz channels, 40km for 118GHz channles,25km for 183-380Ghz,17km for 425GHz
[Best Resolution: 17m]
Swath
China Full Disc Scan Mode, Regional Scan Mode(2700km*3000km), Rapid Scan Mode(1500km*1500km)
Accuracy
NEDT: 0.5-1.5K
Calibration accuracy：<1.5K
Waveband
23–425 GHz frequency range, with fine-spectrum microwave channels (50–60 GHz) and Thz channels above 200 GHz, totaling 135 channels.
FY-4M - FY-4M Geostationary Meteorological Satellite (2027 - 2034) |