On the Suitability of TerraSAR-X Split Antenna Mode for Current Measurements by Along-Track Interferometry

Roland Romeiser, Helko Breit, Michael Eineder, Hartmut Runge, Pierre Flament, Karin De Jong, Jur Vogelzang

Research output: Contribution to conferencePaper

17 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages1320-1322
Number of pages3
StatePublished - Nov 24 2003
Externally publishedYes
Event2003 IGARSS: Learning From Earth's Shapes and Colours - Toulouse, France
Duration: Jul 21 2003Jul 25 2003

Other

Other2003 IGARSS: Learning From Earth's Shapes and Colours
CountryFrance
CityToulouse
Period7/21/037/25/03

ASJC Scopus subject areas

  • Computer Science Applications
  • Earth and Planetary Sciences(all)

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    Romeiser, R., Breit, H., Eineder, M., Runge, H., Flament, P., De Jong, K., & Vogelzang, J. (2003). On the Suitability of TerraSAR-X Split Antenna Mode for Current Measurements by Along-Track Interferometry. 1320-1322. Paper presented at 2003 IGARSS: Learning From Earth's Shapes and Colours, Toulouse, France.