CrIS

Cross-track Infrared Sounder

Satellites

NPP, NPOESS 1/3 and possibly 2/4

Status

Being developed – To be utilised in the period 2010 to ~ 2027 (2029 if also on NPOESS 2/4)

Mission

Temperature/humidity sounding, ozone profile and total-column green-house gases

Instrument type

IR spectrometer/interferometer (1300 channels)

Scanning technique

Cross-track: 32 steps of 48 km s.s.p., swath 2200 km - Along-track: one 48-km line every 8 s

Coverage/cycle

Near-global coverage twice/day

Resolution (s.s.p.)

3 x 3 14 km IFOV covering a 48 x 48 km2 cell (average sampling distance: 16 km)

Resources

Mass: 87 kg - Power: 91 W - Data rate: 1.44 Mbps

Spectral range (µm)

Spectral range (cm-1)

Spectral resolution (unapodised)

Radiometric accuracy (NEΔT)

9.13 - 15.40 µm

650 - 1095 cm-1

0.625 cm-1

......... K @ ...... K

5.71 - 8.26 µm

1210 - 1750 cm-1

1.25 cm-1

......... K @ ...... K

3.92 - 4.64 µm

2155 - 2550 cm-1

2.5 cm-1

......... K @ ...... K