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Regenerative pseudo-noise ranging for deep space applicationsCurrently, ranging for deep space missions is performed by turning around the uplink ranging modulation and remodulating it onto the downlink carrier. This method results in about 1.5 MHz of noise also being modulated onto the downlink, severely degrading the received ranging SNR on the ground. This degradation must be compensated for by either increasing the integration time of the received signal, which increases the length of time for the track, or increasing the downlink ranging signal's modulation index, which decreases the power available for the telemetry modulation. A method for the regeneration on the spacecraft of a pseudo noise (PN) ranging signal has been developed. This method allows for an increase of up to 30dB in the received downlink ranging power. The increased power can be used to decrease the measurement uncertainty, reduce the time of the measurement, or increase the power allocated to the downlink telemetry. This system was implemented in the Spacecraft Transponding Modem that was developed by JPL for NASA.
Document ID
20060044098
Acquisition Source
Jet Propulsion Laboratory
Document Type
Conference Paper
External Source(s)
Authors
Berner, Jeff B.
Kinma, Peter W.
Layland, James M.
Date Acquired
August 23, 2013
Publication Date
October 29, 2001
Meeting Information
Meeting: ESA 3rd Workshop on Tracking, Telemetry and Command Systems for Space Applications
Location: Noordwijk
Country: Netherlands
Start Date: October 29, 2001
Distribution Limits
Public
Copyright
Other
Keywords
deep space ranging
pseudo-noise ranging
regenerative ranging
PN ranging

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