ICID 0 => EARTH_GLOBAL_TROPICS
- Earth radiance.
- Global Earth radiance measurements.
- Dayside of the orbit (1 block per orbit).
- From launch onwards, almost every orbit, except during spatial zoom-in measurement days and during Monthly 3 observational scenario (1 orbit per month).
Earth global measurement with instrument settings optimised for high Earth radiances at tropical latitudes. The dark (background) measurements of ICID 3 are eventually used to correct these light measurements in the 0-1 data processing.