|TSM/TDM Science Team Meeting 2016|
|Science Team Meetings|
|How to Submit a Proposal|
|COFUR Price List (scientific use)|
|TanDEM-X Science Service System|
|Title||Exploitation of Doppler signatures for ocean current and wind retrievals|
|Investigator||Romeiser, Roland - University of Miami, RSMAS-AMP|
Objectives: Main objectives of the project are the demonstration and evaluation of ocean current and wind retrievals from TerraSAR-X data by Doppler residual analysis. As already demonstrated with data from ERS and ENVISAT, one can retrieve (at a reduced spatial resolution) Doppler centroid maps from complex SAR data in various ways. The Doppler centroids are composed of a large contribution of the relative line-of-sight velocity between satellite and rotating earth and a small contribution of additional line-of-sight velocities of moving targets. Since the platform velocity contribution can be calculated quite accurately from available orbit and attitude data, one can extract the Doppler residuals corresponding to target motions and use the SAR as a Doppler radar for ocean current measurements at resolutions on the order of a few km.
A successful demonstration of this technique will stimulate the use of TerraSAR-X for oceanic applications requiring absolute current measurements. The development and use of a low-resolution current data product on the basis of Doppler centroid analysis of conventional SAR data will also stimulate the interest in higher-resolution current data which will be obtained experimentally from the split antenna mode of TerraSAR-X (permitting along-track interferometry) at a later stage.
Method: To demonstrate and evaluate the Doppler residual analysis, the following activities will be performed:
Data requirements: 40 TerraSAR-X images (stripmap mode, single-look complex), to be acquired over two test areas during Jan-Jun '07. Reference data will be acquired continuously on a routine basis; members of the project team have unlimited access to these data. ENVISAT ASAR data are obtained within other existing projects.
Deliverables: Comprehensive final report and online presentations for experts and potential users, describing the proposed algorithms for current and wind retrievals and all other important findings.
Funding: Most of the scientific work will be financed from internal resources of the participants. Additional funding (including travel, publications, and overhead costs) will be requested from DLR / BMBF.
Back to list of proposals
|© DLR 2004-2016||