NDLI: On-orbit performance of Milstar rubidium and quartz frequency standards

Content Provider	IEEE Xplore Digital Library
Author	Bhaskar, N.D. Matt, A.D. Russo, N. McClelland, T. Bloch, M. Meirs, M.
Copyright Year	1997
Description	Author affiliation: Aerosp. Corp., Los Angeles, CA, USA (Bhaskar, N.D.)
Abstract	Atomic frequency standards play a critical role in many space systems. The most notable examples are the satellite navigation systems (GPS and GLONOSS). The excellent navigational accuracy of these systems is largely due to the outstanding performance of the on-board cesium and rubidium atomic frequency standards. Future navigation systems will have atomic standards with even improved performance than the current ones. A new generation of military communication satellites-(Milstar) carry on-board multiple redundant rubidium atomic frequency standards which have been designed to meet stringent performance and operational requirements. We have over 3 years of on-orbit performance data of a Crystal Master Oscillator (XMO) on-board the 1" Milstar satellite and over 18 months of on-orbit performance data of a Rubidium Master Oscillator (RMO) on-board the 2/sup nd/ Milstar satellite. 2 RMOs were also placed on long-term life tests in a simulated, space-like environment. In this paper we present data on the long-term on-orbit performance of an XMO and an RMO on-board the Milstar satellites. In addition to the frequency stability we also present long-term data of 2 parameters which critically influence the RMO performance, light intensity from the Rb resonance lamp and the RMO temperature. These along with many others are telemetered to ground. We also compare the on-orbit data with the ground life test data. Our goal is to get some insight into the physics of longterm aging of the rubidium atomic frequency standards.
Starting Page	329
Ending Page	337
File Size	392515
Page Count	9
File Format	PDF
ISBN	078033728X
DOI	10.1109/FREQ.1997.638566
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-05-30
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Frequency Atomic clocks Satellite navigation systems Oscillators Life testing Global Positioning System Military communication Military satellites Stability Resonance
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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