关于雷达影像干涉测量的若干理论问题

就雷达影像干涉测量的若干理论问题进行了讨论,提出了一种高程解算数学模型,该模型基于相邻两点对于同一天线的相位差,以精确可靠的控制点为出发点,可以不必顾及基线估计;提出了将控制点影像坐标与卫星位置参量按成像方程进行平差,以保证相位解缠和高程解算对控制点和卫星位置精度的要求,指出了在此基础上的基线估计方法

Some Aspects on theTheories of SAR Interferometry

This paper discusses several aspects of theories on SAR interferometry.The different mathematic models of interferometry have been discussed and analysed.The paper points out that the ground coordinate system should be chosen carefully in case of using the mathematic model suggested by C.Prati et al and the tangent plane coordinate system must be taken into account.The model proposed by Ph.Hartl et al can be used without considering the earth curveture,but the calculations of base line and the incident angle for every point are the key factors and difficult to be done.The model by R.Gens et al is different in the conception of phase difference which is for one point only,not the difference of phase difference of two neighboring points.The paper aslo points out that the problems mentioned above should be taken into the consideration for applications.A mathematic model for elevation calculation has been proposed based upon the phase difference of two neighbor points to same antenna,and precise control point as the "seed",without taking into account the base_line assessment.The adjustments for the image coordinates of control points and satellite position parameters according to the imaging equations have also been suggest_ed in order to meet the needs of the precision of control points and satellite position for phase unwrapping and elevation calculation,as well as the method of base_line assessment.