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The DSM accuracy in Catalonia was slightly more than one
pixel, without any manual editing, and in spite of multitemporal
differences with the reference data, which was a DTM. For
Sakurajima, the DSM results were poorer, mainly due to the
reasons explained in Section 5.2. Thus, these results are not
representative of the Cartosat-1 potential. In general, Cartosat-1
has a good potential for generation of DSMs with a grid spacing
of about 10 m and accuracy (RMSE) of about 3 m. However,
this can be achieved only by using GCPs (modest in number,
but well measurable).
ACKNOWLEDGEMENTS
We would like to acknowledge ISRO, India for co-organising
this test and providing the image data, DLR (M. Lehner) and
ICC Catalonia for providing the reference data of the Catalonia
test site. We would like also to thank the Japan Association of
Remote Sensing (JARS) for providing the GCPs for the
Sakurajima testfield, and Kokusai Kogyo Co. Ltd. for providing
the reference DSM, and acknowledge Prof. Shunji Murai for his
support in this study.
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