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Initial Study of Normal Isocurvature Surfaces and Their Relation to Partial Derivatives of Plumb Line Curvature

机译:正等曲率曲面及其与垂线曲率偏导数的关系的初步研究

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This work aimed to study isocurvature surfaces of Earth’s normal gravity field and their relation to partial derivatives of a plumb line curvature. An isocurvature surface of a gravity field is a surface along which the value of the plumb line curvature is constant. The normal gravity field is a symmetrical gravity field; therefore, isocurvature surfaces are surfaces of revolution. To study an isocurvature surface, special assumptions are made to form a vector equation, which will hold only for a small coordinate patch of the isocurvature surface. The gradient of a normal plumb line curvature is vertical to the isocurvature surface pointing to the direction along which the curvature of the plumb line decreases or increases the most. In order to show the significance of isocurvature surfaces, it was shown that it is possible to determine the value of the surface derivative of a plumb line’s curvature without differentiating the original complicated function of a plumb line curvature.
机译:这项工作旨在研究地球法向重力场的等曲率表面及其与铅垂线曲率偏导数的关系。重力场的等曲率表面是铅垂线曲率的值沿其恒定的表面。法向重力场是对称重力场。因此,等曲率曲面是旋转曲面。为了研究等曲率曲面,需要做出特殊假设以形成向量方程,该方程仅适用于等曲率曲面的小坐标面。法线垂线曲率的梯度垂直于等曲率表面,并指向垂线曲率最大或最大减少的方向。为了显示等曲率曲面的重要性,已表明可以确定铅垂线曲率的表面导数的值而无需区分铅垂线曲率的原始复杂函数。

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