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中文摘要：
为保持潜艇航行的安全性和隐蔽性,研究了利用重力梯度探测海底障碍地形的方法,推导了不同海底地形模型的重力梯度计算公式。通过仿真计算得到了三种模型下的海底地形重力垂直梯度结果,分析了其变化规律,并给出了利用重力梯度仪输出值推求目标方位和距离的公式。理论分析表明：该方法可以在保持潜艇隐蔽性的情况下探测到水下障碍地形的存在,为潜艇的水下安全航行提供了一种新的技术途径。
英文摘要：
In order to maintain the security and concealment of a submarine in navigation, this paper has discussed a method of detecting the underwater topographic barriers by gravity gradiometry, and deduced the formulas of gravity gradients for several different models of sea-bed terrains. The gravity vertical gradients of those models have been calculated and analyzed. The formulas for orientation and distance are based on gravity gradiometer outputs. The theoretical analysis indicates that the method can detect underwater topographic barriers under the condition of maintaining the submarine＇s security and concealment in navigation and that it provides a new alternative for submarines＇underwater navi- gation.
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