Jacobsen, Karsten
[Author];
Rottensteiner, F.
[Author];
Jacobsen, K.
[Author];
Ying, Yang, M.
[Author];
Heipke, C.
[Author];
Skaloud, J.
[Author];
Stilla, U.
[Author];
Colomina, I.
[Author];
Yilmaz, A.
[Author]
Problems and limitations of satellite image orientation for determination of height models
- [published Version]
You can manage bookmarks using lists, please log in to your user account for this.
Media type:
E-Article;
Text
Title:
Problems and limitations of satellite image orientation for determination of height models
Contributor:
Jacobsen, Karsten
[Author];
Rottensteiner, F.
[Author];
Jacobsen, K.
[Author];
Ying, Yang, M.
[Author];
Heipke, C.
[Author];
Skaloud, J.
[Author];
Stilla, U.
[Author];
Colomina, I.
[Author];
Yilmaz, A.
[Author]
imprint:
Göttingen : Copernicus GmbH, 2017
Published in:ISPRS Hannover Workshop: HRIGI 17 – CMRT 17 – ISA 17 – EuroCOW 17 ; The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences ; XLII-1/W1
Footnote:
Diese Datenquelle enthält auch Bestandsnachweise, die nicht zu einem Volltext führen.
Description:
The usual satellite image orientation is based on bias corrected rational polynomial coefficients (RPC). The RPC are describing the direct sensor orientation of the satellite images. The locations of the projection centres today are without problems, but an accuracy limit is caused by the attitudes. Very high resolution satellites today are very agile, able to change the pointed area over 200km within 10 to 11 seconds. The corresponding fast attitude acceleration of the satellite may cause a jitter which cannot be expressed by the third order RPC, even if it is recorded by the gyros. Only a correction of the image geometry may help, but usually this will not be done. The first indication of jitter problems is shown by systematic errors of the y-parallaxes (py) for the intersection of corresponding points during the computation of ground coordinates. These y-parallaxes have a limited influence to the ground coordinates, but similar problems can be expected for the x-parallaxes, determining directly the object height. Systematic y-parallaxes are shown for Ziyuan-3 (ZY3), WorldView-2 (WV2), Pleiades, Cartosat-1, IKONOS and GeoEye. Some of them have clear jitter effects. In addition linear trends of py can be seen. Linear trends in py and tilts in of computed height models may be caused by limited accuracy of the attitude registration, but also by bias correction with affinity transformation. The bias correction is based on ground control points (GCPs). The accuracy of the GCPs usually does not cause some limitations but the identification of the GCPs in the images may be difficult. With 2-dimensional bias corrected RPC-orientation by affinity transformation tilts of the generated height models may be caused, but due to large affine image deformations some satellites, as Cartosat-1, have to be handled with bias correction by affinity transformation. Instead of a 2-dimensional RPC-orientation also a 3-dimensional orientation is possible, respecting the object height more as by 2-dimensional orientation. The ...