SARLab
Fakultäten » Mathematisch-naturwissenschaftliche Fakultät » Geographisches Institut » Fernerkundung/Remote Sensing Laboratories » Prof. Dr. Michael Schaepman » SARLab
Completed research project
| Title / Titel | Airborne Ultra-Wideband Low-Frequency SAR | ||||||
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| Abstract (PDF, 14 KB) | |||||||
| Summary / Zusammenfassung | We investigate the potential of low-frequency ultra-wide-band (UWB) SAR for mapping glacier beds. To realize this research objective, we make use of data from the Swedish FOI airborne SAR sensor CARABAS operating at 20 - 90 MHz. We have developed a 3D SAR processing method to generate height profiles from these CARABAS data. A 3D reconstruction grid is spanned based on a digital terrain model (DTM) and the backscatter response associated with each grid point is calculated by a time-domain backprojection algorithm. Subsequently, the single flight tracks are merged by a point-wise incoherent multiplication due to the low number of available flight tracks. The 3D SAR application of the CARABAS sensor is especially interesting for estimating glacier height profiles, as the low-frequency radar waves penetrate into ice and thus approximate the profile of the glacier bed up to a certain depth. The algorithm is based on incoherent multiplication to allow meaningful estimations of glacier profiles out of only few, arbitrary flight tracks. To further improve results, a refractivity model was incorporated into the algorithm and results were compared with other studies of glacier volume estimation methods that were based on glacier flow dynamics. Weitere Informationen |
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| Publications / Publikationen | - Henke, D., Barmettler, A. and Meier, E.: Bistatic experiment with the UWB-CARABAS sensor - First results and prospects of future applications, Proc. of the IEEE International Geoscience & Remote Sensing Symposium, Cape Town, South Africa, 2009.Henke, D; Meier, E (2010). Preliminary results of a low-frequency 3D-SAR approach for glacier volume mapping. In: IEEE Geoscience and Remote Sensing Symposium (IGARSS 2010), Honolulu, Hawaii, USA, 25 July 2010 - 30 July 2010, 2027-2030.Barmettler, A; Zuberbühler, L; Meier, E; Ulander, L; Gustavsson, A; Wellig, P (2008). Swiss airborne monostatic and bistatic dual-pol SAR experiment at the VHF-Band. In: Informationstechnische Gesellschaft im VDE (ITG) , [et al.]. EUSAR 2008. Berlin, 139-142. ISBN 978-3-8007-3084-1.Ulander, L; Flood, B; Frölind, P-O; Gustavsson, A; Jonsson, T; Rasmusson, J; Stenström, G; Barmettler, A; Meier, E (2008). Bistatic experiment with ultra-wideband VHF-band synthetic- aperture radar. In: Informationstechnische Gesellschaft im VDE (ITG) , [et al.]. EUSAR 2008. Berlin, 131-134. ISBN 978-3-8007-3084-1.Weitere Informationen | ||||||
| Keywords / Suchbegriffe | Remote Sensing, Synthetic Aperture Radar SAR, ultra-wide band radar, UWB | ||||||
| Project leadership and contacts / Projektleitung und Kontakte |
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| Funding source(s) / Unterstützt durch |
Other Public Sources (e.g. Federal or Cantonal Agencies) |
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| In collaboration with / In Zusammenarbeit mit |
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| Duration of Project / Projektdauer | Dec 2000 to Dec 2012 |