Abstract
The retrieval of quantitative information on ocean waves from SAR images is a challenging problem because of the nonlinearities of the imaging mechanism, the presence of speckle noise, and the directional ambiguities associated with the interpretation of a SAR image as a single snapshot in time. We present a new methodology that overcomes some of these problems by utilizing spotlight-mode data from TerraSAR-X and COSMO-SkyMed in combination with advanced subaperture processing. We are able to derive short time series of subaperture images, which show propagation directions and speeds of moving patterns. Then we can use Fourier analysis and a dispersion relation filter to separate actual ocean wave signatures from other contributions. This process is phase-preserving and lets us reconstruct short "videos" of the spatio-temporal evolution of the extracted wave signatures, which are easier to invert into surface slope and elevation fields than conventional SAR images.
| Original language | English (US) |
|---|---|
| Title of host publication | 2018 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018 - Proceedings |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 146-148 |
| Number of pages | 3 |
| ISBN (Electronic) | 9781538671504 |
| DOIs | |
| State | Published - Oct 31 2018 |
| Event | 38th Annual IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018 - Valencia, Spain Duration: Jul 22 2018 → Jul 27 2018 |
Publication series
| Name | International Geoscience and Remote Sensing Symposium (IGARSS) |
|---|---|
| Volume | 2018-July |
Conference
| Conference | 38th Annual IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018 |
|---|---|
| Country | Spain |
| City | Valencia |
| Period | 7/22/18 → 7/27/18 |
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Keywords
- Ocean waves
- SAR
- Subaperture processing
ASJC Scopus subject areas
- Computer Science Applications
- Earth and Planetary Sciences(all)
Cite this
A new technique for phase-resolving ocean wave observations by spaceborne spotlight-mode synthetic aperture radar. / Romeiser, Roland; Graber, Hans C.
2018 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2018. p. 146-148 8517526 (International Geoscience and Remote Sensing Symposium (IGARSS); Vol. 2018-July).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - A new technique for phase-resolving ocean wave observations by spaceborne spotlight-mode synthetic aperture radar
AU - Romeiser, Roland
AU - Graber, Hans C
PY - 2018/10/31
Y1 - 2018/10/31
N2 - The retrieval of quantitative information on ocean waves from SAR images is a challenging problem because of the nonlinearities of the imaging mechanism, the presence of speckle noise, and the directional ambiguities associated with the interpretation of a SAR image as a single snapshot in time. We present a new methodology that overcomes some of these problems by utilizing spotlight-mode data from TerraSAR-X and COSMO-SkyMed in combination with advanced subaperture processing. We are able to derive short time series of subaperture images, which show propagation directions and speeds of moving patterns. Then we can use Fourier analysis and a dispersion relation filter to separate actual ocean wave signatures from other contributions. This process is phase-preserving and lets us reconstruct short "videos" of the spatio-temporal evolution of the extracted wave signatures, which are easier to invert into surface slope and elevation fields than conventional SAR images.
AB - The retrieval of quantitative information on ocean waves from SAR images is a challenging problem because of the nonlinearities of the imaging mechanism, the presence of speckle noise, and the directional ambiguities associated with the interpretation of a SAR image as a single snapshot in time. We present a new methodology that overcomes some of these problems by utilizing spotlight-mode data from TerraSAR-X and COSMO-SkyMed in combination with advanced subaperture processing. We are able to derive short time series of subaperture images, which show propagation directions and speeds of moving patterns. Then we can use Fourier analysis and a dispersion relation filter to separate actual ocean wave signatures from other contributions. This process is phase-preserving and lets us reconstruct short "videos" of the spatio-temporal evolution of the extracted wave signatures, which are easier to invert into surface slope and elevation fields than conventional SAR images.
KW - Ocean waves
KW - SAR
KW - Subaperture processing
UR - http://www.scopus.com/inward/record.url?scp=85063150708&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85063150708&partnerID=8YFLogxK
U2 - 10.1109/IGARSS.2018.8517526
DO - 10.1109/IGARSS.2018.8517526
M3 - Conference contribution
T3 - International Geoscience and Remote Sensing Symposium (IGARSS)
SP - 146
EP - 148
BT - 2018 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
ER -