| REN Lin,MAO Zhihua,HUANG Haiqing,GONG Fang. 2010. Satellite-based RAR performance simulation for measuring directional ocean wave spectrum based on SAR inversion spectrum. Acta Oceanologica Sinica, (4):13－20 |
| Satellite-based RAR performance simulation for measuring directional ocean wave spectrum based on SAR inversion spectrum |
| Satellite-based RAR performance simulation for measuring directional ocean wave spectrum based on SAR inversion spectrum |
| Received:February 07, 2010 Revised:May 04, 2010 |
| DOI：10.1007/s13131-010-0054-7 |
| Key words:satellite-based RAR directional wave spectrum SAR inversion performance simulation |
| 中文关键词: satellite-based RAR directional wave spectrum SAR inversion performance simulation |
| 基金项目:The National Natural Science Foundation of China under contract No. 40730843 and the National High Technology Development Program ("863" Program), under contract No. 2007AA12Z182. |
| Author Name | Affiliation | E-mail | | REN Lin | Department of Electromagnetic Fields and Microwave Theory, Nanjing University of Science and Technology, Nanjing 210094, China
State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China | renlin210@sio.org.cn | | MAO Zhihua | State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China | | | HUANG Haiqing | State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China | | | GONG Fang | State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China | |
|
| Hits: 814 |
| Download times: 654 |
| Abstract: |
| Some missions have been carried out to measure wave directional spectrum by synthetic aperture radar (SAR) and airborne real aperture radar (RAR) at a low incidence. Both them have their own advantages and limitations. Scientists hope that SAR and satellite-based RAR can complement each other for the research on wave properties in the future. For this study, the authors aim to simulate the satellite-based RAR system to validate performance for measuring the directional wave spectrum. The principal measurements are introduced and the simulation methods based on the one developed by Hauser are adopted and slightly modified. To enhance the authenticity of input spectrum and the wave spectrum measuring consistency for SAR and satellite-based RAR, the wave height spectrum inversed from Envisat ASAR data by cross spectrum technology is used as the input spectrum of the simulation system. In the process of simulation, the sea surface, backscattering signal, modulation spectrum and the estimated wave height spectrum are simulated in each look direction. Directional wave spectrum are measured based on the simulated observations from 0° to 360°. From the estimated wave spectrum, it has an 180° ambiguity like SAR, but it has no special high wave number cut off in all the direction. Finally, the estimated spectrum is compared with the input one in terms of the dominant wave wavelength, direction and SWH and the results are promising. The simulation shows that satellite-based RAR should be capable of measuring the directional wave properties. Moreover, it indicates satellite-based RAR basically can measure waves that SAR can measure. |
| 中文摘要: |
| Some missions have been carried out to measure wave directional spectrum by synthetic aperture radar (SAR) and airborne real aperture radar (RAR) at a low incidence. Both them have their own advantages and limitations. Scientists hope that SAR and satellite-based RAR can complement each other for the research on wave properties in the future. For this study, the authors aim to simulate the satellite-based RAR system to validate performance for measuring the directional wave spectrum. The principal measurements are introduced and the simulation methods based on the one developed by Hauser are adopted and slightly modified. To enhance the authenticity of input spectrum and the wave spectrum measuring consistency for SAR and satellite-based RAR, the wave height spectrum inversed from Envisat ASAR data by cross spectrum technology is used as the input spectrum of the simulation system. In the process of simulation, the sea surface, backscattering signal, modulation spectrum and the estimated wave height spectrum are simulated in each look direction. Directional wave spectrum are measured based on the simulated observations from 0° to 360°. From the estimated wave spectrum, it has an 180° ambiguity like SAR, but it has no special high wave number cut off in all the direction. Finally, the estimated spectrum is compared with the input one in terms of the dominant wave wavelength, direction and SWH and the results are promising. The simulation shows that satellite-based RAR should be capable of measuring the directional wave properties. Moreover, it indicates satellite-based RAR basically can measure waves that SAR can measure. |
|
HTML
View Full Text
View/Add Comment Download reader |
| Close |
|
|
|
