The OLCI Level-1 operational processor is divided into three processing modes, each with their own Level-1B products.

• Earth observation mode aims to compute Level-1B products from Level-0 products related to raw data acquired by the instrument on one unique orbit in Earth observation configuration.
• Radiometric mode aims to compute calibration coefficients.
• Spectral calibration mode aims to compute absolute wavelengths at specific positions on the sensor's arrays.

Note:

• Earth observation processing outputs two products by default; one in Full Resolution (FR) with a spatial resolution of approximately 300 m and one in Reduced Resolution (RR) with a spatial resolution of approximately 1.2 km.
• The output from the radiometric calibration process is a set of calibration look-up-tables.
• Spectral calibration processor output is a set of wavelength characterisation tables.