| Title | Numerical simulation and validation of ocean waves measured by an along-track interferometric synthetic aperture radar |
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| Author | Zhang, B; He, Y; Vachon, P W |
| Source | Chinese Journal of Oceanology and Limnology; vol. 26, no. 1, 2008 p. 1-8, https://doi.org/10.1007/s00343-008-0001-z |
| Year | 2008 |
| Alt Series | Natural Resources Canada, Contribution Series 20181003 |
| Publisher | Springer Nature |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Subjects | geophysics; remote sensing |
| Program | Canada Centre for Remote Sensing Divsion |
| Released | 2008 02 01 |
| Abstract | A new nonlinear integral transform of ocean wave spectra into Along-Track Interferometric Synthetic Aperture Radar (ATI-SAR) image spectra is described. ATI-SAR phase image spectra are calculated for
various sea states and radar configurations based on the nonlinear integral transform. The numerical simulations show that the slant range to velocity ratio (R/V), significant wave height to ocean wavelength ratio (Hs/?), the baseline (2B) and
incident angle (?) affect ATI-SAR imaging. The ATI-SAR imaging theory is validated by means of Two X-band, HH-polarized ATI-SAR phase images of ocean waves and eight C-band, HH-polarized ATI-SAR phase image spectra of ocean waves. It is shown that
ATI-SAR phase image spectra are in agreement with those calculated by forward mapping in situ directional wave spectra collected simultaneously with available ATI-SAR observations. ATI-SAR spectral correlation coefficients between observed and
simulated are greater than 0.6 and are not sensitive to the degree of nonlinearity. However, the ATI-SAR phase image spectral turns towards the range direction, even if the real ocean wave direction is 30°. It is also shown that the ATI-SAR imaging
mechanism is significantly affected by the degree of velocity bunching nonlinearity, especially for high values of R/V and Hs/?. |
| GEOSCAN ID | 311357 |
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