OLC products relate to the outputs of the OLCI instrument data processing.

OLC Level-0 products mainly consist of OLCI Instrument Source Packets (ISP), including instrument telemetry, with some related annotations, i.e. time calibration data, time stamps and quality information.

Depending on the instrument configuration, there are three different Level-0 product files of identical structure and format, but of differing size:

• Earth Observation mode
• Radiometric Calibration mode
• Spectral Calibration mode.