On the Suitability of TerraSAR-X Split Antenna Mode for Current Measurements by Along-Track Interferometry
Romeiser, Roland and Breit, Helko and Eineder, Michael and Runge, Hartmut and Flamant, Pierre and Jong, Karin and Vogelzang, Jur (2003) On the Suitability of TerraSAR-X Split Antenna Mode for Current Measurements by Along-Track Interferometry. In: Proceedings of IGARSS'03, CD-ROM. IGARSS 2003, Toulouse.
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Latest concepts for the TerraSAR-X hardware design include the availability of a split antenna mode, in which the fore and aft halves of the SAR antenna array with a total length of 4.8 m can act as separate receiving antennas for along-track interferometry (ATI). The effective ATI time lag will be 0.17 ms. We discuss in this paper whether the split antenna mode is suitable for ocean current measurements. Typical (tidal) currents in coastal areas are on the order of 1 to 2 m/s. To measure them, the ATI time lag should ideally be 20 times longer than the time lag of TerraSAR-X. Furthermore, the backscattered power from the ocean at low wind speeds can be below the noise floor of the instrument. However, the high resolution of TerraSAR-X permits averaging over many pixels to reduce noise. Simulated data products suggest that TerraSAR-X will be capable of measuring currents with satisfactory accuracy at a spatial resolution of about 1 km, which will be sufficient for many applications.
|Document Type:||Conference or Workshop Item (Speech)|
|Title:||On the Suitability of TerraSAR-X Split Antenna Mode for Current Measurements by Along-Track Interferometry|
|Journal or Publication Title:||Proceedings of IGARSS'03|
|Keywords:||Along track interferometry, ocean currents, TerraSAR-X, SRTM|
|Event Title:||IGARSS 2003, Toulouse|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Space|
|HGF - Program Themes:||W EO - Erdbeobachtung|
|DLR - Research area:||Space|
|DLR - Program:||W EO - Erdbeobachtung|
|DLR - Research theme (Project):||UNSPECIFIED|
|Institutes and Institutions:||Remote Sensing Technology Institute|
|Deposited By:||Cornelia Roehl|
|Deposited On:||09 May 2006|
|Last Modified:||06 Jan 2010 22:18|
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