Characteristics of SeaMARC II phase data
Characteristics of SeaMARC II phase data
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SeaMARC II 阶段数据的特征
DOI：
10.1109/48.103531
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发表时间：
1990
影响因子：
4.1
通讯作者：
H. Matsumoto
中科院分区：
文献类型：
--
作者：
H. Matsumoto
讨论了SeaMARC II相位差样品的色散问题。它们似乎是信号方向、范围、噪声水平和海底后向散射强度的函数。从熔岩流区和沉积区在不同深度的现场数据进行了比较。相位差样本的时间分布是偏斜的并且关于模型是不对称的。角分布是对称的模式，与一些相位回绕。现场数据表明存在复杂的噪声干扰场。相位差色散量大于使用简单的高斯各向同性噪声模型计算的值，可能表明海底粗糙度引起的额外相位色散过程。根据相位差样本的分布情况，对从相位差样本中产生测深数据的方法进行了评价。>
The dispersion of SeaMARC II phase-difference samples is discussed. They appear to be a function of signal direction, range, noise level, and backscatter strength of the bottom. Field data from a lava flow area and from sedimented areas at different depths are compared. The temporal distribution of the phase-difference samples was skewed and asymmetrical about the model. The angular distribution was symmetrical about the mode, with some phase wrap-around. The field data show the presence of a complicated noise interference field. The amount of phase-difference dispersion was larger than that calculated by using a simple Gaussian isotropic noise model, possibly suggesting an additional phase-dispersion process caused by bottom roughness. The method used to produce bathymetry data from the phase-difference samples was evaluated in light of the phase-difference sample distribution. >