To geographically reference AVHRR data to the earth's surface, ADAPS models the position and attitude of the satellite and the scanning geometry of the AVHRR sensor. There are three main components of the satellite model:
Orbital model Platform/Sensor model Earth modelThe three components of the satellite model collectively comprise two types of satellite geometric models:
Forward (line/sample/elevation to latitude/longitude) Inverse (latitude/longitude/elevation to line/sample)By modeling the satellite's orbit, the position of the satellite can be propagated to a time of interest within an AVHRR image.
A program may access these routines by linking the following object libraries.
$ADAPSLIB/model.a