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    • 10. 发明授权
    • Depression angle ranging system and methods
    • 抑郁角度测距系统和方法
    • US4670758A
    • 1987-06-02
    • US655704
    • 1984-09-28
    • John M. Campbell
    • John M. Campbell
    • G01S11/04G01S13/00G01S13/08
    • G01S13/003G01S11/04
    • A system and related methods for passively detecting range and/or elevation of a signal emitting target by employing an X-beam antenna system which has a fixed angle .theta. between planes of receipt and which rotates those planes of receipt at a rate of sweep .gamma.. A first correlator is employed to measure the time delay .DELTA.T.sub.1 between receipt of a signal directly from a target in the first plane of the X-beam and receipt of a signal from the target in that first plane but reflected from a remote surface. A second correlator is employed to measure the time delay .DELTA.T.sub.2 between receipt of a signal from the target in the first plane and subsequent receipt of a signal from that target in the second plane as the first and second planes rotate. Receiver altitude R.sub.H is measured by conventional means and thereafter target range and/or elevation is calculated in response to .theta., .gamma., .DELTA.T.sub.1, .DELTA.T.sub.2 and R.sub.H.
    • 一种用于被动地检测信号发射目标的范围和/或仰角的系统和相关方法,该X射线天线系统在接收平面之间具有固定角度θ并且以扫描伽马速率旋转这些接收平面。 使用第一相关器来测量在X射线的第一平面中直接从目标物接收到的信号之间的时间延迟DELTA T1,并且从该第一平面接收来自目标的信号,但是从远程表面反射。 当第一和第二平面旋转时,使用第二相关器来测量接收到来自第一平面中的目标的信号和随后从第二平面中的该目标接收到的信号之间的时间延迟DELTA T2。 接收器高度RH通过常规方式测量,此后根据θ,γ,DELTA T1,DELTA T2和RH计算目标范围和/或仰角。