Proceedings of the KSRS Conference (대한원격탐사학회:학술대회논문집)
- 2003.11a
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- Pages.286-288
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- 2003
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- 1226-9743(pISSN)
Geometric Assessment and Correction of SPOT5 Imagery
- Kwoh, Leong Keong (Centre for Remote Imaging, Sensing and Processing, National University of Singapore) ;
- Xiong,, Zhen (Centre for Remote Imaging, Sensing and Processing, National University of Singapore) ;
- Shi, Fusheng (Centre for Remote Imaging, Sensing and Processing, National University of Singapore)
- Published : 2003.11.03
Abstract
In this paper, we present our implementation of the direct camera model (image to ground) for SPOT5 and use it to assess the geometric accuracy of SPOT5 imagery. Our assessment confirms the location accuracy of SPOT5 imagery (without use of GCPs) is less than 50m. We further introduce a few attitude parameters to refine the camera model with GCPs. The model is applied to two SPOT5 supermode images, one near vertical, incidence angle of 3 degrees, and one far oblique, incidence angle of 27 degrees. The results show that accuracy (rms of check points) of about one pixel (2.5m) can be achieved with about 4 GCPs by using only 3 parameters to correct the yaw, pitch and roll of the satellite.