Division 5.1 Satellites-Based Observations

C3S shall use operational and past satellite-based instruments to provide products for climatology, reanalysis and validation purposes.

The C3S shall use the following types of data:

1. (a)

   radiometer and spectrometer data acquired in the domain covering the infrared to the microwave wavelengths to measure brightness temperature and then derive several geophysical parameters (wind vector, ozone, surface temperature);

2. (b)

   GPS-radio occultation data to derive information on the atmosphere's temperature, pressure and water vapour content;

3. (c)

   scatterometer data to measure near-surface wind speed and direction;

4. (d)

   altimeter data to derive ocean wave height.

The service shall be also supported by data and products from the Sentinel satellites.