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Digital Doppler measurement with spacecraftDigital and analog phase-locked loop (PLL) receivers were operated in parallel, each tracking the residual carrier from a spacecraft. The PLL tracked the downlink carrier and measured its instantaneous phase. This information, combined with a knowledge of the uplink carrier and the transponder ratio, permitted the computation of a Doppler observable. In this way, two separate Doppler measurements were obtained for one observation window. The two receivers agreed on the magnitude of the Doppler effect to within 1 mHz. There was less jitter on the data from the digital receiver. This was due to its smaller noise bandwidth. The demonstration and its results are described.
Document ID
19910069897
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Kinman, Peter W.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Hinedi, Sami M.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Labelle, Remi C.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Bevan, Roland P.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Del Castillo, Hector M.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Chong, Dwayne C.
(JPL Pasadena, CA, United States)
Date Acquired
August 14, 2013
Publication Date
August 1, 1991
Publication Information
Publication: IEEE Transactions on Instrumentation and Measurement
Volume: 40
ISSN: 0018-9456
Subject Category
Space Communications, Spacecraft Communications, Command And Tracking
Accession Number
91A54520
Distribution Limits
Public
Copyright
Other

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