GMI

GPM Microwave Imager

Satellite

GPM-core. GPM-constellation, GPM-Brazil

Status

Being developed – To be utilised in the period 2013 to ~ 2019

Mission

Multi-purpose MW imager, with emphasis on precipitation

Instrument type

MW radiometer with 7 frequencies / 13 channels

Scanning technique

Conical: 53° zenith angle; useful swath: 850 km - Scan rate: 32 scan/min = 12.8 km/scan

Coverage/cycle

Global coverage in 2 days; high latitudes (> 70°) not covered

Resolution

Changing with frequency, consistent with an antenna diameter of 1.2 m

Resources

Mass: 80 kg - Power: 90 W - Data rate: 25 kbps

Central frequency (GHz)

Bandwidth (MHz)

Polarisations

Accuracy (NEΔT)

IFOV

Pixel

10.65

100

V, H

0.6 K

19.4 x 32.2 km

12.8 x 25.6 km

18.7

200

V, H

0.7 K

11.2 x 18.3 km

6.4 x 12.8 km

23.8

200

V

0.9 K

9.2 x 15.0 km

6.4 x 12.8 km

36.5

1000

V, H

0.4 K

8.6 x 14.4 km

6.4 x 12.8 km

89.0

6000

V, H

0.7 K

4.4 x 7.2 km

3.2 x 6.4 km

165.5

3000

V, H

1.5 K

4.4 x 7.2 km

3.2 x 6.4 km

183.31

3500

V

1.5 K

4.4 x 7.2 km

3.2 x 6.4 km

183.31

4500

V

1.5 K

4.4 x 7.2 km

3.2 x 6.4 km