SCIAMACHY

Scanning Imaging Absorption Spectrometer for Atmospheric Cartography (SCIAMACHY)

SCIAMACHY	Scanning Imaging Absorption Spectrometer for Atmospheric Cartography
Satellite	Envisat
Status	Operational – Utilised in the period 2002 to ~ 2013
Mission	Atmospheric chemistry. Tracked species: O3, O2, O4, NO, NO2, NO3, N2O, CO, CO2, CH4, H2O, BrO, ClO, OClO, HCHO, SO2 and aerosol
Instrument type	UV/VIS/NIR/SWIR grating spectrometer, eight bands, 8192 channels, with 7 polarisation channels
Scanning technique	Cross-track: 16-km cross-track x 32-km along-track, for a swath of 1000 km - One scan line in 4.5 s Limb mode: in addition to vertical scanning, ± 500 km horizontal scanning across track is provided Solar and lunar occultation: in this mode the instrument is self-calibrating (DOAS principle) The three modes are alternative to each other
Coverage/cycle	Cross-track mode: if used full time, it would provide global coverage every 3 days (in daylight) Limb mode: if used full time, it would provide global coverage every 3 days (in daylight) Solar and lunar occultation: N/A
Resolution	Cross-track mode: 16 x 32 km2 s.s.p. Limb mode: 3 km, in the altitude range 10-100 km, horizontal effective resolution: ~ 300 km (limb geometry) Solar and lunar occultation: 1 km, in the altitude range 10-100 km, horizontal effective resolution: ~ 300 km
Resources	Mass: 198 kg - Power: 122 W - Data rate: 400 kbps

Spectral range	Number of channels	Spectral resolution	SNR at specified input radiance
240-314 nm	1024	0.24 nm	................. @ .................
309-405 nm	1024	0.26 nm	................. @ .................
394-620 nm	1024	0.44 nm	................. @ .................
604-805 nm	1024	0.48 nm	................. @ .................
785-1050 nm	1024	0.54 nm	................. @ .................
1000-1750 nm	1024	1.48 nm	................. @ .................
1940-2040 nm	1024	0.22 nm	................. @ .................
2265-2380 nm	1024	0.26 nm	................. @ .................
310-2380 nm	7	67 to 137 nm, depending on channel	................. @ .................