Abstract
Along-Track Interferometric (ATI) SAR has demonstrated through several studies a capability to detect ocean surface currents. One of the most challenging problems in ocean surface current retrieval using SAR is the removal of the wind-wave contribution. The phase difference provided by ATI-SAR technique is directly related to the radial velocity of the moving ocean surface. In order to infer the current-only velocity from the total phase the wind-wave contribution need to be removed. This is achieved by simulation of SAR Doppler spectra from given wind fields. This paper investigates the effect of the local wind on ATI-SAR phase. A study case, where the backscatter modulation is dominated by the wind variation, is illustrated using TanDEM-X data over the Baltic Sea. It is shown that retrieving high resolution winds from SAR data using an empirical wind model and using the retrieved winds as input to the SAR imaging model improves the simulated SAR signatures.
| Original language | English (US) |
|---|---|
| Title of host publication | 2016 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2016 - Proceedings |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 3982-3985 |
| Number of pages | 4 |
| Volume | 2016-November |
| ISBN (Electronic) | 9781509033324 |
| DOIs | |
| State | Published - Nov 1 2016 |
| Event | 36th IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2016 - Beijing, China Duration: Jul 10 2016 → Jul 15 2016 |
Other
| Other | 36th IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2016 |
|---|---|
| Country | China |
| City | Beijing |
| Period | 7/10/16 → 7/15/16 |
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Keywords
- ATI SAR
- Ocean current
- SAR Doppler
- SAR wind
ASJC Scopus subject areas
- Computer Science Applications
- Earth and Planetary Sciences(all)
Cite this
Wind-wave effect on ATI-SAR measurements of ocean surface currents in the Baltic Sea. / Elyouncha, Anis; Eriksson, Leif E.B.; Romeiser, Roland; Carvajal, Gisela K.; Ulander, Lars M.H.
2016 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2016 - Proceedings. Vol. 2016-November Institute of Electrical and Electronics Engineers Inc., 2016. p. 3982-3985 7730035.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Wind-wave effect on ATI-SAR measurements of ocean surface currents in the Baltic Sea
AU - Elyouncha, Anis
AU - Eriksson, Leif E.B.
AU - Romeiser, Roland
AU - Carvajal, Gisela K.
AU - Ulander, Lars M.H.
PY - 2016/11/1
Y1 - 2016/11/1
N2 - Along-Track Interferometric (ATI) SAR has demonstrated through several studies a capability to detect ocean surface currents. One of the most challenging problems in ocean surface current retrieval using SAR is the removal of the wind-wave contribution. The phase difference provided by ATI-SAR technique is directly related to the radial velocity of the moving ocean surface. In order to infer the current-only velocity from the total phase the wind-wave contribution need to be removed. This is achieved by simulation of SAR Doppler spectra from given wind fields. This paper investigates the effect of the local wind on ATI-SAR phase. A study case, where the backscatter modulation is dominated by the wind variation, is illustrated using TanDEM-X data over the Baltic Sea. It is shown that retrieving high resolution winds from SAR data using an empirical wind model and using the retrieved winds as input to the SAR imaging model improves the simulated SAR signatures.
AB - Along-Track Interferometric (ATI) SAR has demonstrated through several studies a capability to detect ocean surface currents. One of the most challenging problems in ocean surface current retrieval using SAR is the removal of the wind-wave contribution. The phase difference provided by ATI-SAR technique is directly related to the radial velocity of the moving ocean surface. In order to infer the current-only velocity from the total phase the wind-wave contribution need to be removed. This is achieved by simulation of SAR Doppler spectra from given wind fields. This paper investigates the effect of the local wind on ATI-SAR phase. A study case, where the backscatter modulation is dominated by the wind variation, is illustrated using TanDEM-X data over the Baltic Sea. It is shown that retrieving high resolution winds from SAR data using an empirical wind model and using the retrieved winds as input to the SAR imaging model improves the simulated SAR signatures.
KW - ATI SAR
KW - Ocean current
KW - SAR Doppler
KW - SAR wind
UR - http://www.scopus.com/inward/record.url?scp=85007483300&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85007483300&partnerID=8YFLogxK
U2 - 10.1109/IGARSS.2016.7730035
DO - 10.1109/IGARSS.2016.7730035
M3 - Conference contribution
AN - SCOPUS:85007483300
VL - 2016-November
SP - 3982
EP - 3985
BT - 2016 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2016 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
ER -