Rectification of Oblique Photographs to Obtain Base-Surge Contours

Abstract

Rectification of oblique aerial photographs is one means used to obtain contours of the base surge formed by an underwater nuclear explosion. An analytic photogrammetric method of rectification, based on the visible horizon and altitude of the photo aircraft, is described. This method gives the position of any point on the photograph in terms of its coordinates in a rectangular grid system on the water surface. The supplemental information needed to rectify an oblique photograph also is discussed.