公开(公告)号：US06222487B1

公开(公告)日：2001-04-24

申请号：US09347118

申请日：1999-07-02

Applicant: Sten Ahlbom ,  Ragner Arvidsson ,  Bengt Andersson

Inventor： Sten Ahlbom ,  Ragner Arvidsson ,  Bengt Andersson

IPC: G01S520

CPC classification number: G01S13/42 ,  G01S5/0009 ,  G01S5/04 ,  G01S13/003

Abstract: A method and a system for determining an altitude of an object of interest, for example, an airplane that transmits electromagnetic radiation in the form of radar signals. A number of sub-units that can detect the radar signals are spread out in an area, preferably in a large geographical area, where the radar signals of the airplane/object it is possible to detect. The sub-units communicate to the information center when they are able to detect the radar signals. The information center determines the altitude of the airplane based on the airplanes line of sight, i.e., its radar horizon, and thus which sub-units can detect the radar signals.

Abstract translation: 用于确定感兴趣对象的高度的方法和系统，例如以雷达信号的形式传送电磁辐射的飞机。 可以检测雷达信号的多个子单元分布在优选地在可能检测到的飞机/物体的雷达信号的较大地理区域的区域中。 当它们能够检测到雷达信号时，子单元与信息中心通信。 信息中心根据飞机视线（即其雷达水平线）确定飞机的高度，从而确定哪些子单元可以检测雷达信号。