Global Positioning System Constellation Clock Performance

An overview of the Global Positioning System (GPS) constellation with respect to the lifetimes of space vehicles and space vehicle clocks, both active and deactivated, is presented. Analysis of clock performance with respect to frequency stability is reviewed. The operational Navstar timing signals...

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Bibliographic Details
Main Authors: Oaks, Jay, Largay, Marie M, Reid, Wilson G, Buisson, James A
Format: Report
Language:English
Subjects:
CLOCKS
COMPONENT REPORTS
CONSTELLATIONS
FREQUENCY STABILIZERS
GLOBAL POSITIONING SYSTEM
GPS(GLOBAL POSITIONING SYSTEM)
Navigation and Guidance
RUBIDIUM
SPACECRAFT
SYMPOSIA
Test Facilities, Equipment and Methods
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Description
Summary:An overview of the Global Positioning System (GPS) constellation with respect to the lifetimes of space vehicles and space vehicle clocks, both active and deactivated, is presented. Analysis of clock performance with respect to frequency stability is reviewed. The operational Navstar timing signals are ranked according to frequency stability for a sample time of 1 day. In addition, the performance of the Block IIR clocks is compared to that of two flight-qualified Block IIR rubidium atomic frequency standards undergoing life tests in the NRL Precision Clock Evaluation Facility. This work was performed under the sponsorship of the GPS Joint Program Office. See also ADM001507. Presented at the Annual Precise Time and Time Interval (PTTI) Planning Meeting (34th), held in Reston, VA, on 3-5 December 2002. Published in the proceedings of the meeting, p77-88, 2002. The original document contains color images.