AVHRR CEOS format

The AVHRR CEOS (Raw AVHRR CCT Image Format) is supported. The specifications for this format are outlined in the following document:

 DMD-TM #90-678F
 "Standard Raw AVHRR CCT Image Format Specifications"
 Canada Centre for Remote Sensing

Typically, AVHRR CEOS data exists in tape format. A single CEOS scene consists of 5 tape files: volume directory file, leader file, image file, trailer file, and null volume directory file. It is possible to transfer the 5 tape files corresponding to a single scene into 5 disk files. In order to import the 5 disk files corresponding to a CEOS scene, it is necessary to supply the volume directory file as the input file (FILI parameter) and ensure that the 5 disk files follow the appropriate naming convention. As an example, these are the names of 5 disk files corresponding to a CEOS scene: myscene.vol, myscene.led, myscene.img, myscene.trl, and myscene.nul. Note that only the volume directory file and image file are mandatory. All of the files corresponding to the same scene must reside in the same directory.

For the AVHRR CEOS format, FIMPORT creates a binary orbit segment containing per-scanline quality, calibration, and timing information.