Minimize Observation Mode

Unlike calibration mode (see Algorithms Overview Calibration mode), observation mode includes all the necessary processing steps to transform raw data into full resolution, geolocated, co-located nadir and along track view, Top of Atmosphere (TOA) brightness temperatures (in the case of the thermal IR channels) or radiances (in the case of visible, NIR and SWIR channels) from all SLSTR channels.

Two main steps are defined:

  1. Level-1A processing consists of computing ortho-geolocation of each instrument pixel as well as radiometric calibration coefficients and appending them to numerical counts, without applying them.
  2. Level-1B processing mainly consists of the calibration of SLSTR measurements, their time domain averaging (for SWIR channels only), re-gridding, cosmetic filling, surface classification and cloud identification at pixel level, as well as appending meteorological annotations to a sub-grid of tie-points.