FMCW ALTIMETER PDF

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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Personal Sign In. For IEEE to continue sending you helpful information on our products and services, please consent to our updated Privacy Policy. Email Address. Sign In. A wide altitude range is attained by employing an optical delay in the path of transmission to reduce the dynamic range of the altitude being measured. The transmitter power and receiver gain are also controlled to facilitate a reduction in the dynamic range of the received power.

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?

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Radar Systems - FMCW Radar

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