NDLI: An FM-CW Radar for Simultaneous Three-Dimensional Velocity and Altitude Measurement

Content Provider	IEEE Xplore Digital Library
Author	Fried, Walter R.
Copyright Year	1963
Abstract	An FM-CW radar is described which simultaneously furnishes three-dimensional velocity and absolute altitude information. The velocity is measured by means of a low frequency FM-CW Doppler technique and the altitude information by means of phase comparison on one of the sidebands of the received spectrum. The optimum radar parameters required for the two functions are completely compatible. Use of the first order sideband permits operation of the system down to zero feet altitude. Offset reference frequency techniques and narrow band leakage elimination techniques permit system operation through zero speed and to negative speeds. Contrary to conventional FM-CW altimeters, the altitude measurement technique is unaffected by amplitude noise and by frequency (Doppler) noise due to vehicle motion. The radar technique is particularly applicable to helicopters, VTOL aircraft and lunar landing vehicles, and possibly also to satellite rendezvous. Actual flight test results have demonstrated the feasibility of the radar technique.
Starting Page	17
Ending Page	37
Page Count	21
File Size	4098418
File Format	PDF
ISSN	05361516
Volume Number	1
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1963-08-01
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Radar measurements Velocity measurement Doppler radar Spaceborne radar Noise level Vehicles Frequency measurement Phase measurement Narrowband Measurement techniques
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Aerospace Engineering

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An FM-CW Radar for Simultaneous Three-Dimensional Velocity and Altitude Measurement

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