The OLCI Level-0 product is composed of three different packages, all designed for internal use.
Each package includes a manifest file and several data files. The content and the format of each Level-0 product are similar for these three packages. The only difference is the size, since the calibration processing is limited to 1 500 frames.
The manifest file is written in XML and contains information such as identifiers, or textual descriptions, concerning the product and the processing.
The measurement data file is a binary file containing the time-ordered raw data contained previously in the ISP. The content is the same as the ISP downlinked from the spacecraft platform to the receiving ground station. A selection is performed to discard duplicated and corrupted packets from the Level-0 product.
Two annotations data files are included in the Level-0 product: the ISP annotation data file and the OnLine Quality Control (OLQC) report. The ISP annotations data file includes time stamps, and ISP and FEP annotations.
Two representation data files are included in the OL_0_EFR product. These files describe in XML schema, the format of the measurement data file and of the ISP annotation data file.