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| Titel |
Inter-agency comparison of TerraSAR-X/TanDEM-X baseline solutions |
| VerfasserIn |
Adrian Jaeggi, Heike Bock, Rolf Koenig, Yongjin Moon, Martin Wermuth, Oliver Montenbruck |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250050906
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| Zusammenfassung |
| TanDEM-X (TerraSAR-X add-on for Digital Elevation Measurement) is the first Synthetic
Aperture Radar (SAR) mission using close formation flying for bistatic SAR interferometry.
The primary goal of the mission is to generate a global digital elevation model
from the configurable SAR interferometer with space baselines of a few hundred
meters. As a key mission requirement for the interferometric SAR processing, the
the relative position, or baseline, of the two satellites must be determined with an
accuracy of 1mm (1D RMS) from GPS measurements collected by the onboard
receivers.
Operational baseline products for the TanDEM-X mission are routinely generated by the
German Research Center for Geosciences (GFZ) and the German Space Operations Center
(DLR/GSOC) using different software packages (EPOS/BERNESE, GHOST) and analysis
strategies. For an independent performance assessment, TanDEM-X baseline solutions are,
furthermore, generated at the Astronomical Institute of the University of Bern (AIUB) on a
best effort basis using the BERNESE GPS software.
We provide an overview of the adopted analysis strategies and present inter-agency
comparisons of the individual baseline solutions. Special emphasis will be given to the
identification and discussion of systematic biases between the individual solutions. The
TanDEM-X baseline determination performance is also compared with results of the GRACE
mission to assess the impact of spacecraft separation and GPS tracking performance on the
achievable baseline accuracy. |
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