This defines a simple format, serialized using MPK, containing "footprints". A footprint is simply a multipolygonal area given in WGS84 coordinates, representing a remote sensing satellite's pixel.
Converting footprint information from different satellites to a common format makes it more convenient when looking for simultaneous (coincident) observations.
A tool, fptool, allows merging different files, exporting the
footprints in GeoJSON format (with or without pretty-printing),
drawing them as SVG or dumping their contexts in human-readable text
form.