IIS

Interferometric Infrared Sounder

Satellites

FY-4 O A/B and follow-on

Status

Being defined - To be utilised from 2012 onward

Mission

Temperature/humidity sounding and wind profile derivation by tracking water vapour features

Instrument type

IR spectrometer/interferometer with large detector arrays for simultaneous sounding of more pixels

Coverage/cycle

Full disk in 60 min. Limited areas in correspondingly shorter time intervals

Resolution (s.s.p.)

Prototype flight 8.0 km, follow-on 4.0 km

Resources

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

Spectral range (cm-1)

Spectral range (µm)

Spectral resolution

Radiometric accuracy (NEΔR)

685 - 1130 cm-1

14.6 - 8.85 µm

0.8 cm-1 (later: 0.3 cm-1)

0.4 mW m-2 sr-1 cm (later: 0.2 mW m-2 sr-1 cm

1650 - 2250 cm-1

6.06 - 4.44 µm

0.2 cm-1 (later: 0.6 cm-1)

0.1 mW m-2 sr-1 cm (later: 0.06 mW m-2 sr-1 cm)