| 摘要 |
A delay compensated Doppler radar altimeter which elimitates the relative delay curvature associated with the energy reflected by a scatterer (x3, x2, xn) located in the along-track direction of an aerial platform (10) for which a most accurate estimation of scatterer elevation is desired. By Doppler shifting each return, the range indicated for each scatterer over its illumination history is equal to the minimum range xh experienced when the relative velocity between the aerial radar (10) and the ground is effectively zero. Compensating each signal so that its entire along-track history can be used for elevation estimation leads to an advantage of more than 10dB in gain improvement over existing systems, and less degradation from surface topography (13).
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