ESTIMATION OF THE MEASUREMENT ERROR OF TERRAIN RELIEF WITH BISTATIC SPACE-BASED RADAR SYSTEM
Annotation
Results of theoretical study of the influence of the ionosphere on the accuracy of the terrain ele-vation measurements using a bistatic interferometer are presented. The interferometer under consideration is based on space radar with synthesis of the P-band aperture and ground receiving point. The necessary statistical characteristics of random signal fluctuations are determined. A method for calculating the error in the height estimates depending on the interferometer geometry, the effect of ionosphere parameters, additive noise, and spatial decorrelation of radar images is described. According to the presented numerical dependences, it is possible to estimate the optimal range of values of the interferometric base and the error in determining the height for both point and extended targets. In the case of reflection from extended targets, the error due to the spatial decorrelation of the reflected signals in a single resolution element is considered additionally.
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