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首页> 外文会议>International Laser Radar Conference >THE IDEA OF NEW COMBINED RAMAN-ELASTIC LIDAR FOR MEASURING THE SEAWATER BACKSCATTERING PROFILES
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THE IDEA OF NEW COMBINED RAMAN-ELASTIC LIDAR FOR MEASURING THE SEAWATER BACKSCATTERING PROFILES

机译：新综合拉曼弹性激光器测量海水后散谱的思路

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We propose the new two-wavelength lidar to retrieve seawater backscattering profiles, using the elastic channel with light frequency equal to a half-sum of initial and Raman-shifted frequencies of the Raman channel. These specific wavelengths provide the same attenuation laws for elastic and Raman signals, if absorption and scattering spectra can be approximated by power law. Particularly, seawater supplies such a possibility in the region 400-500 nm, if extremely bio-productive waters are not considered and chlorophyll absorption peak at 440 nm does not come out the background of DOM absorption. With these specific initial wavelengths, the elastic and Raman lidar returns differ only in the backscattering coefficients. Since the Raman backscattering coefficient is constant along the profile, the ratio of these lidar returns (elastic-to-Raman) directly produces the profile of the elastic backscattering coefficient. This technique stays valid even under multiple scattering conditions, what is of great importance for seawater sounding.
机译：我们提出了新的双波长LIDAR来检索海水反向散射型材，利用具有光频的弹性通道等于拉曼通道的初始和拉曼移位频率的半和。如果可以通过电力法近似吸收和散射光谱，这些特定波长提供相同的弹性和拉曼信号的衰减定律。特别是，海水在400-500nm区域提供这种可能性，如果未考虑极其生物生产水域，并且440nm处的叶绿素吸收峰不会出现Dom吸收的背景。利用这些特定的初始波长，弹性和拉曼LIDAR返回仅在反向散射系数中不同。由于拉曼反向散射系数沿着轮廓恒定，因此这些激光雷达返回的比率（弹性到拉曼）直接产生弹性反向散射系数的轮廓。即使在多次散射条件下，这种技术也保持有效，对海水听起来非常重要。

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