...的一条封闭轮廓曲线，若妒（x，Y）是点＠，Y）到轮廓曲线的最短距离，称 咖（x，Y）为符号距离函数（Signal Distance Function，SDF）。
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The observed changeof each signal as Cassini moved behind the rings provided a profile ofthe distribution of ring material as a function of distance fromSaturn, or an optical depth profile.
卡西尼号远离土星环而观察到的每个信号的变化提供了一份环材料分布的侧写。 这是一个距土星距离的函数，或是一个光学深度剖面。
Theoretical analysis and simulation results are given to show the ambiguity function, the distance resolution, the velocity resolution, the intercept factor of the hybrid signal.
理论分析了和计算机模拟了该类信号的模糊函数(图)，距离分辨率、速度分辨率和低截获性能。
Miss distance parameters are estimated by matching pursuit algorithm to search the basis function which best matches the echo signal.
通过匹配追踪算法寻找与回波信号最匹配的基函数来确定脱靶量参数。
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