期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2006
卷号：XXXVI Part 4
出版社：Copernicus Publications
摘要：Geo-referenced high-resolution satellite data product generated using CARTOSAT-1 stereo data can be used for mapping topographic information, navigation, urban planning. This paper present the first set of results of an assessment of geo- positioning accuracy achieved in image scan line and pixel number-to-Object space coordinates using system generated Rational Polynomial Coefficients (RPCs) of CARTOSAT-1 Stereo Orthokit Product. The computed object-space co-ordinates using Un- normalized space intersection model are compared with ground reference control points. The CARTOSAT-1 system derived Rational Functional Model (RFM) is a replacement of rigorous sensor model of an image which represent set of co-efficients relating the geometric relationship of three dimensional object point position to their corresponding two dimensional image positions. The first exercise has shown that the system corrected RPCs have large systematic bias confirming to geo-product accuracy specification of 200m RMS in planimetry and average 20m in height. The same exercise has been further extended with the help of 2-3 precise GCPs for removing bias in Orthokit product and generating Orthoimage using ERDAS 9.0 (COTS) package. The Orthoimage product accuracy has been assessed
