Abstract

Optical sensors for EO cameras used for high altitude imaging, typically are slit field optical configurations in order to make use of existing line array detectors. Two common approaches to obtaining area coverage with a line array are pushbroom, and panning configurations. In either case it is desirable to alter the line of sight of the sensor from nadir to obliquities reaching 60° from nadir. This increases the distance between the ground object and the camera and results in a change in magnification. This change in magnification is observed as a variation in ground sample distance (GSD) and line rate. Since the sensor can only be optimized for one set of conditions, the efficiency of operation varies with pointing angle.

© 1993 Optical Society of America