ScaRaB

Scanner for Radiation Budget

Satellites

Megha-Tropiques (also Meteor-3-7 and Resurs-O1-4)

Status

Being integrated - To be utilised in the period 2009 to ~ 2014 (1994-95 on Meteor-3-7, in 1998-99 on Resurs-O1-4)

Mission

Earth radiation budget at Top Of Atmosphere (TOA)

Instrument type

4-channel radiometer, two broad-band, two narrow-band

Scanning technique

Cross-track: 51 pixel/scan, swath 3200 km - Along-track: 1 scan / 6 s

Coverage/cycle

Intertropical coverage 2 to 6 times/day depending on latitude (best coverage at 15°N and 15°S)

Resolution (s.s.p.)

40 km IFOV

Resources

Mass: … kg - Power: … W - Data rate: … kbps

Channel

Spectral interval

Noise Equivalent Radiance

Absolute accuracy

SNR

Short-wave

0.2 - 4.0 µm

< 0.5 W m-2 sr-1

1 to 2 %

850

Total radiance

0.2 - 50 µm

< 0.5 W m-2 sr-1

1 to 2 %

1000

VIS

0.55 - 0.65 µm

< 1.0 W m-2 sr-1

1 to 2 %

120

TIR

10.5 - 12.5 µm

< 0.5 W m-2 sr-1

1 to 2 %

60