Long Term Time Comparison With GPS Receivers

reportActive / Technical Report | Accession Number: ADA494350 | Open PDF

Abstract:

The Radio Research Laboratory RRL has been making the international time comparison since 1984 by using a GPS Global Positioning System time-transfer receiver which was developed by RRL GTR-I. Time comparisons are made on a routine base between RRL and USEuropean organizations by the common-view method to contribute data of the atomic clocks and the primary frequency standard of URL to the TAI. The time-transfer results between RRL and other time keeping organizations international and domestic via GFS using GTR-1 are presented. In the case of international time-transfer, between RRL and USNO, the precision is about 2O ns for more than a few-day comparisons, and in the case of domestic time-transfer, between RRL and TAO, the precision is about 15 ns. The system noise stability of via SVi - via SVj is 1 - 2 x 10 tau day in both cases. The ionospheric effect on time-transfer via the GPS Li signal was quantitatively estimated by using the total electron contests data measured at RRL. Instabilities due to the ionospheric effects are more than 2.6 x 10 tauday during around solar maximum and about 8 x 1O during solar minimum for the intercontinental time-transfers.

Author(s):
Imae, Michito ; Uratsuka, Makoto ; Miki, Chihiro ; Morikawa, Takao ; Akatsuka, Kosuke ; Yoshimura, Kazuyuki
Author Organization(s):
RADIO RESEARCH LABS TOKYO (JAPAN)
Descriptive Note:
Conference paper
Supplementary Note:
Pub. in the Proceedings of the Annual Precise Time and Time Interval (PTTI) Applications and Planning Meeting (17th) Held 3-5 Dec 1985 in Washington, DC.
Pagination:
0017

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Monitor Series:
X5
 Subject Terms
Joint Capability Areas:
JCA_8_Building Partnerships; JCA_6_Net Centric; JCA_8.2_Shape; JCA_1.3_Human Capital Management; JCA_1_Force Support; JCA_6.1_Information Transport; JCA_8.2.1_Partner with Governments and Institutions; JCA_5_Command and Control
Modernization Areas:
Space
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*ATOMIC CLOCKS, *RADIO RECEIVERS, *GLOBAL POSITIONING SYSTEM, JAPAN, ELECTRONS, FREQUENCY STANDARDS, COMPARISON, ORGANIZATIONS, SYMPOSIA, TIME
Field(s)/Group(s):
Test Facilities, Equipment and Methods, Navigation and Guidance
Keyword(s):
TIME COMPARISON, FOREIGN REPORTS
Report Date:
1985 Dec 01
Creation Date:
2009 Mar 11