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A high performance frequency standard and distribution system for Cassini Ka-band experiment

Show simple item record Wang, Rabi T. Calhoun, M. D. Kirk, A. Diener, W. A. Dick, G. J. Tjoelker, R.L. 2006-06-12T22:33:45Z 2006-06-12T22:33:45Z 2005-08-29
dc.identifier.citation 2005 Joint IEEE International Frequency Control Symposium (FCS) and Precise Time and Time Interval (PTTI) Systems and Applications Meeting, Vancouver, British Colombia, Canada, August 29-31, 2005. en
dc.identifier.clearanceno 05-2945
dc.description.abstract This paper provides an overview and update of a specialized frequency reference system for the NASA Deep Space Network (DSN) to support Ka-band radio science experiments with the Cassini spacecraft, currently orbiting Saturn. Three major components, a Hydrogen Maser, Stabilized Fiber-optic Distribution Assembly (SFODA), and 10 Kelvin Cryocooled Sapphire Oscillator (10K CSO) and frequency-lock-loop, are integrated to achieve the very high performance, ground based frequency reference at a remote antenna site located 16 km from the hydrogen maser. Typical measured Allan Deviation is 1.6 -14 1 0a't 1 second and 1.7 x 10 -15 at 1000 seconds averaging intervals. Recently two 10K CSOs have been compared in situ while operating at the remote DSN site DSS-25. The CSO references were used operationally to downconvert the Ka band downlink received from the Cassini spacecraft in a series of occultation measurements performed over a 78 day period from March to June 2005. en
dc.description.sponsorship NASA/JPL en
dc.format.extent 3637370 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2005. en
dc.subject sapphire en
dc.subject oscillator en
dc.subject Cassini en
dc.title A high performance frequency standard and distribution system for Cassini Ka-band experiment en
dc.type Preprint en

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