Example of an atmospheric temperature profile expected from IASI

IASI performance

IASI spectral resolution

Spectral resolution

The spectral resolution is expected to be within 0.35 to 0.5 cm-1 depending on wavelength.

IASI radiometric resolution

Radiometric resolution

The radiometric resolution is expected to be within 0.25 to 0.5K.

Radiometric noise is specified in terms of the noise equivalent temperature difference (NEDT) for a given reference temperature of 280K. The NEDT requirements apply to pseudo-channels defined as an average of individual samples, having widths of 0.5 cm-1.

Parameter Characteristics
Scan type Step and dwell
Scan rate 8 s
IFOV 3.33°
IFOC size at Nadir 12 km
Sampling at Nadir 25 km
Pixel/scan 120
Swath ± 48.3°
Swath ± 1026 km
Spectral range 645 to 2760 cm-1
Lifetime 5 years
Power 210 W
Size 1.2 x 1.1 x 1.3 m3
Mass 236 kg
Data rate 1.5 Mbps

Last update: 29 June 2006

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