What is the calibration file?
The Calibration Parameter File (CPF) includes a set of radiometric, geometric and artefact removal parameters used during Level 1 processing of Landsat 7 / 5 data. The Image Assessment Team, based at USGS, continuously reviews and updates the file parameters. The USGS distributes the CPF file to the international ground stations. The files can also be loaded on the related web site. The CPF is used as auxiliary information during the processing from raw level to upper leve1. The CPF is released for a one month period and can be reviewed during the period.