| 摘要 |
<p>A synthetic aperture radar (SAR) system comprising a space-borne or airborne transmitter, a space-borne or airborne analogue repeater and a ground-based receiver. The transmitter transmits a signal to a surface to be imaged, the reflected signal then is then received by an analogue repeater which transmits the reflected signal to a ground-based receiver where it is converted from analogue to digital and a bistatic synthetic aperture radar image is constructed and stored. The digital signal may also be transmitted across a network before it is processed further. The transmitter may operate in at least two frequency bands including 300 MHz and at least 35 GHz; the analogue repeater may operate at a frequency of 30 GHz or more, or at the Ka-band.</p> |
