IASI A Spot

IASI

Providing temperature and humidity profiles for use in the understanding and making atmospheric forecasts.

IASI A Spot
IASI A Spot

IASI is the main payload instrument for the purpose of supporting Numerical Weather Prediction.

Last Updated

14 July 2021

Published on

23 March 2020

It provides information on the vertical structure of the atmospheric temperature and humidity in an unprecedented accuracy of 1 K and a vertical resolution of 1 km, which is needed to decisively improve NWP. The use of Metop data in NWP accounts for 40% of the impact of all space based observations in NWP forecasts.


What is IASI?

IASI measures in the infrared part of the electromagnetic spectrum at a horizontal resolution of 12 km over a swath width of about 2,200 km. With 14 orbits in a sun-synchronous mid-morning orbit (9:30 Local Solar Time equator crossing, descending node) global observations can be provided twice a day.

IASI product releases

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