Accession Number:

ADP004577

Title:

First Results of GPS (Global Positioning System) Time Transfer to Australia,

Descriptive Note:

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC

Report Date:

1984-04-02

Pagination or Media Count:

26.0

Abstract:

A Global Positioning System time transfer unit built by NBS under contract to JPL was installed at Tidbinbilla Deep Space Communications Complex of the NASA Deep Space Network in June 1983. It has been used to estimate the relationship to UTCUSNO MC of the Tidbinbilla frequency and time system TIDFTS based on a hydrogen maser, and thence to estimate the performance of the Australian free-running time scale UTCAUS. Data from the first three months has been analysed three ways by two-hop common view using JPL as intermediary by long-arc interpolation of measurements against space vehicle clocks and by long-arc interpolation of GPS-Time results. Residuals from a single quadratic fit through three months of UTCUSNO MC - TID FTS results were white noise with standard error 15 ns, and a flying clock measurement gave 70 ns agreement. A straight line fit through results UTCUSNO MC - UTC AUS gave 90 ns standard error and 120 bns agreement. It is proposed to use the GPS measurements to steer UTSAUS to UTCBIH, and to rename the existing time scale TAAUS. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE