It is known that the pulse radar altimeter is an important assembly in the terrain contour matching system (TERCOm). The total performance of the TERCOm is almost determined by the echo-tracking and height-calculation...
详细信息
It is known that the pulse radar altimeter is an important assembly in the terrain contour matching system (TERCOm). The total performance of the TERCOm is almost determined by the echo-tracking and height-calculation algorithms embedded in the radar altimeter. The normal Offset Centre of Gravity (ocog) algorithm and other classical methods based on tracking the half-power point of the rising-edge of the echo could not commendably meet the needs of the TERCOm system. A robust echo-tracking and height-calculation algorithm, the modified Offset Centre of Gravity (m-ocog) algorithm, is firstly presented in the paper. On the basis of the characteristic of the complicated echo, the superiority of m-ocog algorithm at the aspects of echo-tracking ability and height-measuring performance is analyzed in detail. The TERCOm effect is also analyzed by two kinds of quantitative analysis approach here. The feasibility of applying m-ocog algorithm to TERCOm radar altimeter is confirmed at the end of paper.
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