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 language | English (US) |
|---|---|
| Pages | 1320-1322 |
| Number of pages | 3 |
| State | Published - Nov 24 2003 |
| Externally published | Yes |
| Event | 2003 IGARSS: Learning From Earth's Shapes and Colours - Toulouse, France Duration: Jul 21 2003 → Jul 25 2003 |
Other
| Other | 2003 IGARSS: Learning From Earth's Shapes and Colours |
|---|---|
| Country | France |
| City | Toulouse |
| Period | 7/21/03 → 7/25/03 |
ASJC Scopus subject areas
- Computer Science Applications
- Earth and Planetary Sciences(all)