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Laser Doppler And Range Systems For SpacecraftReport discusses two types of proposed laser systems containing active transponders measuring distance (range) and line-of-sight velocity (via Doppler effect) between deep space vehicle and earth-orbiting satellite. Laser system offers diffraction advantage over microwave system. Delivers comparable power to distant receiver while using smaller transmitting and receiving antennas and less-powerful transmitter. Less subject to phase scintillations caused by passage through such inhomogeneous media as solar corona. One type of system called "incoherent" because range and Doppler measurements do not require coherence with laser carrier signals. Other type of system called "coherent" because successful operation requires coherent tracking of laser signals.
Document ID
19900000053
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Kinman, P. W.
(Caltech)
Gagliardi, R. M.
(University of Southern California)
Date Acquired
August 14, 2013
Publication Date
February 1, 1990
Publication Information
Publication: NASA Tech Briefs
Volume: 14
Issue: 2
ISSN: 0145-319X
Subject Category
Electronic Systems
Report/Patent Number
NPO-17486
Accession Number
90B10053
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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