Altimeters are nadir-looking pulse-radars often. They transmit short microwave pulses and measure the round trip time delay t 0 to targets to determine their distance height h from the air- or spaceborne sensor. For lower height measurements a frequency modulated continuous wave radar FMCW can be used. This technology provides a better resolution but a lower maximum unambiguous height measurement at comparable wiring effort. Often both technologies are used simultaneously. For a pulse radar, the calculation of the height is possible according to the following approach:.
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The performance of the radar altimeter was experimentally verified using an optical-delay simulator, which provided a delay time corresponding to a m radar distance. To assess the performance of the system in a realistic setting, the radar altimeter was tested using a crane setup. The crane test demonstrated that the design described in this paper resulted in a reduced measurement-error rate.
Article :. Date of Publication: 27 July DOI: Need Help?
Radar Systems - FMCW Radar
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