三站时差定位下的目标时差与高度关系研究

The relationship between time difference and height of target based on three-station TDOA location

三站时差定位由于已知参数的限制,无法对目标进行三维定位。对于存在一定高度的目标,未知其高度,必然会影响三站时差定位的精度,知道其高度,会提高三站时差定位的精度。鉴于此,文中通过实际目标的先验经纬度信息,研究在不同高度层下,目标的真实时差分布规律。分析三站时差定位系统测得的时差分布规律,并与真实时差分布规律作对比,估算出目标的高度。

Due to the limitation of known parameters,the three-station TDOA location can not locate the target in three dimensions.For a target with a certain height,unknown height will inevitably affect the accuracy of TDOA location.Knowing its height will improve the accuracy of TDOA location.Therefore,through the prior longitude and latitude information of the actual target,the real time difference distribution law of the target at different altitudes is studied in this paper.The time difference distribution law measured by the three-station TDOA positioning system is analyzed,and compared with the real time difference distribution law,the height of the target is estimated.