Wind direction extraction from synthetic aperture radar (SAR) using wavelet transform technique
Backscatter of RadarSat-1 SAR images for incidence angles between 20° to 70° at an ocean area is caused by Bragg scattering. The Bragg-scale waves created based on the response of the ocean to the wind stress. Therefore, wind direction can be retrieved in radar images from the orientation of the win...
| Main Authors: | , , , |
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| Format: | Conference or Workshop Item |
| Language: | English |
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IEEE
2012
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| Online Access: | http://psasir.upm.edu.my/id/eprint/45118/ http://psasir.upm.edu.my/id/eprint/45118/1/Wind%20direction%20extraction%20from%20synthetic%20aperture%20radar%20%28SAR%29%20using%20wavelet%20transform%20technique.pdf |
| _version_ | 1848850479853862912 |
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| author | Asmat, Arnis Mohamad Deros, Siti Noratiqah Zainal Abiddin, Muhammad Zamzuri Mansor, Shattri |
| author_facet | Asmat, Arnis Mohamad Deros, Siti Noratiqah Zainal Abiddin, Muhammad Zamzuri Mansor, Shattri |
| author_sort | Asmat, Arnis |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Backscatter of RadarSat-1 SAR images for incidence angles between 20° to 70° at an ocean area is caused by Bragg scattering. The Bragg-scale waves created based on the response of the ocean to the wind stress. Therefore, wind direction can be retrieved in radar images from the orientation of the wind streaks that visible in the images. However, the variation of the incidence angle can cause geometric distortion and variation in scattering components. SAR images for Wide-3 and Extended-High 6 modes have produced wind direction which similar as recorded in AWAC data with correlation are r=0.94 and r=0.98respectively. The wind blows for both images is correspond during North East Monsoon (September to March) with wind speed about 0.9 m/s. However, weak correlation is exhibits for Standard-2 (r=0.29), it may due to wide range of incidence angle that slow wind speed become invisible to the wavelet formation. From the result, it shows that Extended High-6 mode is considered the best mode to make use for extracting wind direction with high correlated with AWAC data. This is also confirmed that large incident angle with small range angle provides more information on wind direction, as Extended High-6 having the largest incidence angle among the two modes. As conclusion, the SAR backscatter is closely affected by the incidences angles, and this can provide on wind direction information for wind studies. |
| first_indexed | 2025-11-15T10:06:57Z |
| format | Conference or Workshop Item |
| id | upm-45118 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T10:06:57Z |
| publishDate | 2012 |
| publisher | IEEE |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-451182020-08-04T02:42:18Z http://psasir.upm.edu.my/id/eprint/45118/ Wind direction extraction from synthetic aperture radar (SAR) using wavelet transform technique Asmat, Arnis Mohamad Deros, Siti Noratiqah Zainal Abiddin, Muhammad Zamzuri Mansor, Shattri Backscatter of RadarSat-1 SAR images for incidence angles between 20° to 70° at an ocean area is caused by Bragg scattering. The Bragg-scale waves created based on the response of the ocean to the wind stress. Therefore, wind direction can be retrieved in radar images from the orientation of the wind streaks that visible in the images. However, the variation of the incidence angle can cause geometric distortion and variation in scattering components. SAR images for Wide-3 and Extended-High 6 modes have produced wind direction which similar as recorded in AWAC data with correlation are r=0.94 and r=0.98respectively. The wind blows for both images is correspond during North East Monsoon (September to March) with wind speed about 0.9 m/s. However, weak correlation is exhibits for Standard-2 (r=0.29), it may due to wide range of incidence angle that slow wind speed become invisible to the wavelet formation. From the result, it shows that Extended High-6 mode is considered the best mode to make use for extracting wind direction with high correlated with AWAC data. This is also confirmed that large incident angle with small range angle provides more information on wind direction, as Extended High-6 having the largest incidence angle among the two modes. As conclusion, the SAR backscatter is closely affected by the incidences angles, and this can provide on wind direction information for wind studies. IEEE 2012 Conference or Workshop Item PeerReviewed text en http://psasir.upm.edu.my/id/eprint/45118/1/Wind%20direction%20extraction%20from%20synthetic%20aperture%20radar%20%28SAR%29%20using%20wavelet%20transform%20technique.pdf Asmat, Arnis and Mohamad Deros, Siti Noratiqah and Zainal Abiddin, Muhammad Zamzuri and Mansor, Shattri (2012) Wind direction extraction from synthetic aperture radar (SAR) using wavelet transform technique. In: 2012 IEEE Symposium on Computer Applications and Industrial Electronics (ISCAIE 2012), 3-4 Dec. 2012, The Magellan Sutera Resort, Kota Kinabalu, Sabah. (pp. 103-106). 10.1109/ISCAIE.2012.6482078 |
| spellingShingle | Asmat, Arnis Mohamad Deros, Siti Noratiqah Zainal Abiddin, Muhammad Zamzuri Mansor, Shattri Wind direction extraction from synthetic aperture radar (SAR) using wavelet transform technique |
| title | Wind direction extraction from synthetic aperture radar (SAR) using wavelet transform technique |
| title_full | Wind direction extraction from synthetic aperture radar (SAR) using wavelet transform technique |
| title_fullStr | Wind direction extraction from synthetic aperture radar (SAR) using wavelet transform technique |
| title_full_unstemmed | Wind direction extraction from synthetic aperture radar (SAR) using wavelet transform technique |
| title_short | Wind direction extraction from synthetic aperture radar (SAR) using wavelet transform technique |
| title_sort | wind direction extraction from synthetic aperture radar (sar) using wavelet transform technique |
| url | http://psasir.upm.edu.my/id/eprint/45118/ http://psasir.upm.edu.my/id/eprint/45118/ http://psasir.upm.edu.my/id/eprint/45118/1/Wind%20direction%20extraction%20from%20synthetic%20aperture%20radar%20%28SAR%29%20using%20wavelet%20transform%20technique.pdf |