Providing temperature and humidity profiles for use in the understanding and making atmospheric forecasts.
IASI is the main payload instrument for the purpose of supporting Numerical Weather Prediction.
20, November 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.
GOME-2 is used to get a detailed picture of the total atmospheric content and vertical profile of ozone.
Microwave Humidity Sounder (MHS)
The MHS is designed to collect information on various aspects of the Earth's atmosphere and surface.
SARSAT instruments help search and rescue authorities save thousands of lives around the world.
Assimilation of IASI L2 temperature and humidity profiles in regional and global NWP
Studying assimilating forecast-independent temperature and humidity retrievals from hyperspectral sounders in NWP models.