The hydrooptical properties (HP) of Lake Baikal water measured in March, 2001 from the ice lake surface with a lidar and a photometer are compared. The employed data processing algorithms and possible errors caused by the influence of multiply scattered radiation are discussed. The deep-water photometer developed at the LI SB RAS is intended for measuring the extinction index ε at 6 wavelengths from 0.42 to 0.65 μm to depths as great as 1500m. The photometer baseline is 1m. With allowance for the reflection from the light source window, absolute values of e were measured with accuracy ≤ 0.002 m~(-1). The Makrel-2 lidar developed at the IAO SB RAS recorded radiation backscattered from hydrosol particles (λ = 0.532 μm). In recent years we have accumulated a large data array measured with this lidar mounted aboard a research vessel or an aircraft. The data processing algorithms allowed depth profiles of the hydrooptical characteristics to be retrieved to depths greater than 20 m with high spatial resolution. However, the algorithmic implementation required a priori information on relationships among the HP for examined water. Direct measurements of the HP were performed with the photometer. The indirect measurements of the light field intensity were performed with the lidar, and the accuracy of the reconstructed parameters was determined by the accuracy and validity of the employed data processing algorithms. A comparison of the data of simultaneous measurements with these two devices allowed us to test the data processing algorithms and to choose the optimal ones. Statistical simulation of lidar operation by the Monte Carlo method allowed us to evaluate errors introduced into measurements by multiply scattered radiation.
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机译：比较了2001年3月从冰湖表面测量的贝加尔湖水的水电图特性（HP），与LIDAR和光度计相比。讨论了所采用的数据处理算法和由乘法散射辐射影响引起的可能误差。在Li SB RAS开发的深水光度计旨在测量从0.42至0.65μm的6波长的消光指数ε，以深度为1500米。光度计基线是1米。利用来自光源窗口的反射的余量，通过精度≤0.002m〜（-1）测量E的绝对值。在IAO SB RAS开发的Makrel-2激光雷达记录了从氢化醇颗粒（λ=0.532μm）的辐射反向散射。近年来，我们积累了使用船上的LIDAR测量的大型数据阵列，该船只是一架研究船只或飞机。数据处理算法允许检索到大于20米的水电图特性的深度轮廓，具有高空间分辨率。然而，算法实现需要关于检查水中HP之间关系的先验信息。用光度计进行HP的直接测量。利用LIDAR执行光场强度的间接测量，并通过所采用的数据处理算法的准确性和有效性来确定重建参数的精度。与这两个设备同时测量数据的比较允许我们测试数据处理算法并选择最佳。 Monte Carlo方法的LIDAR操作的统计模拟使我们通过乘法散射辐射来评估引入测量的误差。
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