The microwave imager is a full power radiation remote control system by adopting taper scan, two-point aperture antenna cycle correction, five frequencies, dual-polarization  and ten-channels. It consists of detector head, cold sky reflector, power distribution unit, CPU, pyrotechnics controller and scan driving controller. 

• Frequency: 10.65, 18.7, 23.8, 36.5, 89 GHz
• Swath: 1400 km
• Dynamic range: 3 - 340K
• Sensitivity: 0.5K
• Efficiency of main beam: ≥94%
• Calibration precision: ≤2.0K 
• Ground resolution: 51km, 85km～9km, 15km
• Weight: ＜ 175kg
•  Power consumption: long term 100W/peak 140W

The imager, carried on FY-3 satellite, is used to monitor and obtain hydrologic parameters to provide important service for the calamity weather forecast, rainstorm diagnosis, environment monitoring and military application.

• Global  precipitation, especially summer rainstorm
• Global cloud liquid state water content and cloud water phase state
• Temperature of global land surface
• Soil humidity
• Sea ice and coverage
• Global snow depth and slush equivalent