Tomography appears now as a promising procedure for remote sensing of various natural media and specifically, for study of the refractive index random inhomogeneities in the atmosphere. A conventional tomograph consists of m sources spaced acrossthe path, and m sensors, also spaced in the same manner. Receiving separately the signals, radiated by each transmitter, one can measure the complex transfer coefficients for all M = m{sup}2 paths. Their correlation matrix is the basic characteristic incase of random inhomogeneities sensing.For the first time such experiments have been carried out in optics using crossed beams [1] to evaluate the structural constant distribution along the path. Special correlation properties of UHF and SHF signals, propagated in the troposphere over theparallel and crossed paths, were noted by Larsen (2]. He made an attempt to collect published experimental data.
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机译：断层扫描现在出现了作为遥感各种天然媒体的有希望的程序，具体地，用于研究大气中的折射率随机不均匀性的研究。传统的断层扫描仪由M个源间隔开的ACOSSTHE路径和M传感器组成，也以相同的方式间隔开。单独接收由每个发射器辐射的信号，可以测量所有m = m {sup} 2路径的复传转系数。它们的相关矩阵是随机不均匀性感测的基本特征。对于使用交叉光束[1]的光学器件中首次进行这种实验，以评估沿路径的结构恒定分布。通过平行和交叉路径在对流层中，在对流层中传播的UHF和SHF信号的特殊相关性，并注意到Larsen（2]。他试图收集公布的实验数据。
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