This Technical Specification identifies the information required to determine the relationship between the position of a remotely sensed pixel in image coordinates and its geoposition. It supports exploitation of remotely sensed images. It defines the metadata to be distributed with the image to enable user determination of geographic position from the observations.This Technical Specification specifies several ways in which information in support of geopositioning may be provided.a) It may be provided as a sensor description with the associated physical and geometric informationnecessary to rigorously construct a Physical Sensor Model. For the case where p