The characteristics of cross-correlation function for two receivers at different depths in deep sea are analyzed. For the receivers near the surface, peaks in the cross-correlation function are close to the main peak, which is difficult to be distinguished, and their positions change minor with variation in source range and depth. While at large depths, the peaks beyond the main peak are separate and more apart from the main peak when source range decreases, source depth increases or water depth increases. The impact of variations in vertical sound speed profile on peak positions of cross-correlation function is relatively minor. Based on these characteristics, a method of cross-correlation function matching is proposed for broadband source range and depth estimation with two receivers at large depths. The accuracy of the proposed method is validated through simulation analysis and sea experimental data processing.

中文翻译：

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大深度接收机互相关函数特性及其在宽带脉冲源定位中的应用

分析了深海不同深度两个接收机互相关函数的特性。对于靠近地表的接收器，互相关函数中的峰值与主峰接近，难以区分，并且它们的位置随着震源范围和深度的变化而变化较小。而在大深度时，当源范围减小、源深度增加或水深增加时，主峰以外的峰是分离的，并且与主峰的距离更远。垂直声速剖面的变化对互相关函数峰值位置的影响相对较小。基于这些特点，提出了一种互相关函数匹配方法，用于两个接收机在大深度处的宽带源距离和深度估计。通过仿真分析和海上实验数据处理验证了该方法的准确性。