| 摘要 |
<p>The present invention relates to a method for generating a three-dimensional image of a ground area by means of a radar with a synthetic aperture, a SAR radar, which is supported by a platform moving in an essentially rectilinear manner. The method is characterised by the following steps: advancing the platform such that at least two images of the ground are created with great difference in the angle of illumination; transmitting radar pulses with a fractional bandwidth which is larger than or equal to 0.1, and using in the computations an aperture angle which is larger than or equal to 0.1 radians; detecting the reflected radar pulses with amplitude and phase; for each pulse, measuring and storing the position of the antenna that transmits and the antenna that receives the pulse; computing a two-dimensional SAR signal per synthetic aperture; starting from the amplitude and phase of the two SAR signals as well as position data for the antennae, reconstructing a three-dimensional position description of the area relative to antenna position data.</p> |
