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MiRS Sensors
GPM GMI Overview

photo: GPM Microwave Imager

photo: GPM Microwave Imager

Satellite(s)

Global Precipitation Measurement (GPM)

MiRS Production Status

Experimental / research


GMI Characteristics
Channel No Central Frequency (Ghz) Central Frequency Stabilization (±MHz) Bandwidth (Mhz) Polarization Integration time (ms) NEDT (K) Antenna beamwidth @ 3dB (º)
1 10.65 10 100 V 9.7 0.96 1.75
2 10.65 10 100 H 9.7 0.96 1.75
3 18.70 20 200 V 5.3 0.84 1.00
4 18.70 20 200 H 5.3 0.84 1.00
5 23.80 20 400 V 5.0 1.05 0.90
6 36.50 50 1000 V 5.0 0.65 0.90
7 36.5 50 1000 H 5.0 0.65 0.90
8 89.00 200 6000 V 2.2 0.57 0.40
9 89.00 200 6000 H 2.2 0.57 0.40
10 166.0 200 3000 V 3.6 1.5 0.40
11 166.0 200 3000 H 3.6 1.5 0.40
12 183.31±3 200 3500 V 3.6 1.5 0.4
13 183.31±7 200 4500 V 3.6 1.5 0.4

  • V: Polarization vector is parallel to scan plane at nadir
  • H: Polarization vector is perpendicular to scan plane at nadir



Scan geometry of GMI (image credit: NASA)


Scan geometry of GMI



Channel footprint scheme of GMI in successive along-scans (image credit: NASA)

Channel footprint scheme of GMI in successive along-scans


Notes:

Source: NASA GMI site

Source: NASA GMI ATBD

Source: eoportal.org

Photo: NASA Precipitation Measurement Missions.