The modulation of a radar signal from the ocean surface due to slope and hydrodynamic effects
| Autor: | Paul A. Hwang, Omar H. Shemdin, Julian C. Holtzman, Richard K. Moore, James C. West |
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| Rok vydání: | 1990 |
| Předmět: |
Atmospheric Science
Soil Science Aquatic Science Oceanography law.invention Radar engineering details Geochemistry and Petrology law Wind wave Earth and Planetary Sciences (miscellaneous) Radar Radar horizon Physics::Atmospheric and Oceanic Physics Earth-Surface Processes Water Science and Technology Ecology Pulse-Doppler radar Paleontology Forestry Scatterometer Geodesy Computational physics Continuous-wave radar Geophysics Space and Planetary Science Wave radar Geology |
| Zdroj: | Journal of Geophysical Research. 95:16291 |
| ISSN: | 0148-0227 |
| DOI: | 10.1029/jc095ic09p16291 |
| Popis: | The modulation of the signal level of a tower-based radar scatterometer illuminating a small area of the ocean surface is predicted from direct measurements of the hydrodynamic conditions of the ocean surface and compared with X band radar measurements taken simultaneously. The radar backscatter is assumed to be due to Bragg resonance between the signal and the ripple waves. The effects of the slope of the ocean surface due to passing long waves are modeled by converting a measured wave height series into a slope time series. Laser-slope-gauge measurements of the spectrum of the ripple waves that ride upon the long ocean waves are used to predict the hydrodynamic effects. Comparisons with the measured radar signal show that the slope modulation alone gives a poor prediction of the modulation. Inclusion of the hydrodynamic effects in the simulation appears more promising, although it also is not entirely successful with this data set. |
| Databáze: | OpenAIRE |
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