IASI

Telecommunication and Observation

Mechanism

Since 2006, the IASI instrument has equipped European Metop satellites. Its strength: in addition to temperature and humidity, it measures more than 25 atmospheric components with great precision. CNES is working on its "evolution": IASI-NG so that these essential data for weather forecasts, pollution and climate monitoring do not stop.

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IASI

telecommunications-and-observations

- Mechanism

Image IASI
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Context

Comat is developing the mechanical part of the SCan Mechanism (SCM) of the IASI-NG instrument (Infrared Atmospheric Sounding Interferometer, New Generation), which belongs to the series of MetOp- SG satellites (Meteorological Operational Satellite, Second Generation).

This development is performed in collaboration with ADS, in charge of building the IASI-NG instrument (and also of supplying the electronic part of the SCM).

Key
Features

2-axis Pointing Mechanism

Stop-and-stare motion to scan the Earth (across the spacecraft track)
Continuous motion to offset spacecraft velocity

Innovative Parallel Architecture

Environments

Mechanical stress during launch
-25°C to +55°C (non-operational)
0°C to 35°C (operational)

Pointing Performances (requirements)

Accuracy: ≤ 250 μrad (1σ)
Stability: ≤ 50 μrad (1σ)

7.75 years lifetime + 15 years storage