Analysis of Geo-Positioning Accuracy Using Stereo Pairs of Wordview-1 and Pleiades-1B Imagery

摘要

It is important to analyze geo-positioning accuracy using high-resolution satellite imageries in order to acquire accurate geo-spatial infonnation. This paper investigates geo-positioning accuracy of combinations with four imageries covering the same region from two different types of satellite platforms and sensors: Worldview-I and Pleiades-IB. For the analysis, seven combinations arc constituted from four imageries: two homo-type stereo pairs, four hetero-type stereo pairs and one stereo of all four imageries. We first assessed the bias of vendor-provided rational polynomial coefficients (RPCs) for each imagery. And then, we compared and analyzed the geo-positioning accuracy achieved by using conventional space interception without ground control points (GCPs) and that achieved by using RPC block adjustment model with five GCPs for seven different combinations separately. This study demonstrates that the use of different types of satellite stereo pairs can achieve meaningful geo-positioning accuracy for inaccessible regions difficult to measure actual ground coordinates by comparing without and with GCPs.