| 机载激光测深海水后向散射包络的频域分析 |
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| 引用本文： | 朱 晓,王 华,齐丽君,掌蕴东.机载激光测深海水后向散射包络的频域分析[J].激光与红外,2003,33(1):25-27. |
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| 作者姓名： | 朱 晓 王 华 齐丽君 掌蕴东 |
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| 作者单位： | 1. 华中科技大学激光技术国家重点实验室,湖北,武汉,430074
2. 哈尔滨工业大学光电子技术研究所,可调谐激光国防重点实验室,黑龙江,哈尔滨,150001 |
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| 基金项目： | 可调谐激光国防重点实验室开放基金资助 |
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| 摘 要： | 根据机载激光测深海水后向散射雷达方程,在机载激光测深系统典型参数情况下,详细分析了海水衰减系数、海水反照率、飞机高度以及光学接收系统全视场角对海水后向散射频谱的影响。得到了: 当衰减系数C 从0. 2/ m 变到0. 9/ m 时, 后向散射包络频谱将展宽236MHz ;当海水反照率ω从0. 1 变到0. 9 时,后向散射包络频谱将展宽220MHz ;机载激光测深系统接收视场角和飞机高度对系统探测到的海水后向散射包络频率无显著影响;当最小可探测功率Pb = 1. 56 ×10 - 10W 时,在典型的实验参数条件下后向散射包络的频率范围为0 < f< 5. 6 ×108Hz。
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| 关 键 词： | 激光测深仪 海水后向散射 海水水质系数 频率分布 |
| 文章编号： | 1001-5078(2003)01-0025-03 |
| 修稿时间： | 2002年4月5日 |
Frequency Analyzing of Backscattering Signals in Airborne Laser Bathymetry |
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| ZHU Xiao ,WANG Hua ,QI Li-jun ,ZHANG Yun-dong.Frequency Analyzing of Backscattering Signals in Airborne Laser Bathymetry[J].Laser & Infrared,2003,33(1):25-27. |
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| Authors: | ZHU Xiao WANG Hua QI Li-jun ZHANG Yun-dong |
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| Affiliation: | ZHU Xiao 1,WANG Hua 1,QI Li-jun 1,ZHANG Yun-dong 2 |
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| Abstract: | In terms of Airborne laser bathymetry backscattering lider equation ,the backscattering envelop is analyzed in the field of frequency . The frequency included in backscatter envelop would broad 236MHz and 220MHz when the attenuation coefficient of sea water changes from 0. 2/ m to 0. 9/ m and the albedo of the sea water changes from 0.1 to 0. 9 respectively. The altitude of the plane and the optical receiver field of view have little effect on the frequency of backscattering signals. When the sensitivity of the detecting system is 1. 56 ×10 - 10W , the frequency width of backscattering envelop is 0 < f < 5. 6 ×108Hz ,under the typical experimental parameters. |
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| Keywords: | laser bfathometer backscattering of ocean water att enuation coefficient of ocean water FFT |
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