Sherman S.C.W. Current approaches to the problem of side-looking radar mapping

ISPRS Archives. – 1984. — Volume XXV. — Part A3. — Pp. 1179 - 1183.XVth ISPRS Congress. Technical Commission III: Mathematical analysis of data. 17-29 June 1984, Rio de Janeiro, Brasil.A camera measures angles and a photograph is a central projection. Radar measures distances and radar images are therefore range protection. Therefore, stereo model geometries are quit different between radar imagery and aerial photography. Contour compilation from radar can be made practical using similar techniques and orientation procedures that are used for conventional photogrammetry. The measuring principal is completely different. This paper discusses geometric corrections of side-looking radar images emphasizing the correction of radar layover geometry. Implementation is made on AS-11AM analytical plotter with modification made to plotter software that is used for map compilation using panoramic photography,