Bumpy platform SAR three-dimensional motion error estimation method
A three-dimensional motion and error estimation technology, applied in the field of SAR imaging, can solve the problems such as the inability to meet the quality requirements of SAR imaging of bumpy platforms and the complex motion trajectory, to overcome the inability to compensate the space-variant phase error, improve the focusing effect, solve the calculation error and Effects of other disturbances
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[0029] The embodiments and effects of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0030] refer to figure 1 , is a schematic diagram of the imaging geometric model of the bumpy platform SAR; the bumpy platform SAR flies along the x direction (the azimuth direction of the radar) at a horizontal velocity v, where the solid line represents the ideal trajectory of the platform flight, the dotted line represents the actual trajectory of the platform flight, and point P is A target point in the scene. The flying height of the platform is H.
[0031] In an ideal situation, the platform will move in a straight line at a uniform speed along the track indicated by the solid line. Curved trajectory flight. Let point B be the slow time t in a certain direction m The ideal position of the radar antenna phase center (APC) when , its three-dimensional coordinates are, x 0 =[x 0 (t a ), y 0 (t a ),z 0 (t a )] T (i...
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