ORTHORECTIFICATION OF WORLD VIEW 2 STEREO PAIR USING A NEW RIGOROUS ORIENTATION MODEL

Abstract. The use of very high resolution satellite images in photogrammetric works is increasing continuously, especially in works such as orthoimages production or Digital Elevation Models extraction. A large number of new photogrammetric uses of Earth Observation data appear due to improvement of the geometric accuracy of the products. The use of a rigorous orientation geometric model for the georeferencing of satellite image data increases the geometric potential of the photogrammetric procedure relating the satellite image to the ground point coordinates. The application of the commonly used geometric models demands the use of several control points (GCPs); the exact number of GCPs depends on the unknown parameters that need to be defined. In this paper a new rigorous orientation geometric model for pushbroom linear array sensor based on collinearity equations is described. The model uses the interior orientation parameters and orbital data; in its full version the model has 24 unknown parameters. The advantages of this model in comparison with the normal use of collinearity equations are the existence of less unknown parameters and the use of three observation equations for each observed point on the image. The scale factor in collinearity equations is not eliminated but it is modelled as a second order surface polynomial.