Comparing C- and L-band SAR images for sea ice motion estimation
| Autor: | J. Lehtiranta, S. Siiriä, J. Karvonen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | The Cryosphere, Vol 9, Iss 1, Pp 357-366 (2015) |
| Druh dokumentu: | article |
| ISSN: | 1994-0416 1994-0424 |
| DOI: | 10.5194/tc-9-357-2015 |
| Popis: | Pairs of consecutive C-band synthetic-aperture radar (SAR) images are routinely used for sea ice motion estimation. The L-band radar has a fundamentally different character, as its longer wavelength penetrates deeper into sea ice. L-band SAR provides information on the seasonal sea ice inner structure in addition to the surface roughness that dominates C-band images. This is especially useful in the Baltic Sea, which lacks multiyear ice and icebergs, known to be confusing targets for L-band sea ice classification. In this work, L-band SAR images are investigated for sea ice motion estimation using the well-established maximal cross-correlation (MCC) approach. This work provides the first comparison of L-band and C-band SAR images for the purpose of motion estimation. The cross-correlation calculations are hardware accelerated using new OpenCL-based source code, which is made available through the author's web site. It is found that L-band images are preferable for motion estimation over C-band images. It is also shown that motion estimation is possible between a C-band and an L-band image using the maximal cross-correlation technique. |
| Databáze: | Directory of Open Access Journals |
| Externí odkaz: |
|