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A radar altimeter-driftmeter for small planetary probesA light weight radar altimeter-driftmeter applicable to landing planetary probes is described. The system utilizes a small light weight phased array antenna to generate three independent radio frequency beams. The range and Doppler along each of these beams is measured. The six measured quantitites are then combined with a resulting range (altitude) accuracy of 75 meters and a horizontal drift velocity accuracy of 6 cm/sec. The entire system weighs less than 3.7 kilograms and requires less than 9 watts of dc power.
Document ID
19720011867
Acquisition Source
Legacy CDMS
Document Type
Preprint (Draft being sent to journal)
Authors
Bryan, J. W. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 2, 2013
Publication Date
December 1, 1971
Subject Category
Instrumentation And Photography
Report/Patent Number
NASA-TM-X-65837
X-551-71-512
Report Number: NASA-TM-X-65837
Report Number: X-551-71-512
Accession Number
72N19517
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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