: This bibliography was prepared to supplement Technical Report DRP-92- 1, Kinematic Differential Global Positioning System. The bibliography represents a current (as of March 1989) and comprehensive listing of publications and papers dealing with the Global Positioning System.

Global positioning system bibliography

From 20 October to 17 November 1986, three Contracting and three Government institutions took part in a cooperative evaluation of the accuracy of the Global Positioning System (GPS). In effect, acting as independent GPS users employing CIA-code single-frequency or P-code dual-frequency receivers, each organization computed satellite-to-user range prediction errors. Each institutional user computed statistical summaries of these User Range Errors (URE). The root-mean-square (rms) of the URE’s across all satellites, and over all 30-days of the test, as reported by each user ranged from a high of 4.8 meters to a low of 3.1 meters. The C/A-code users experienced the largest rms URE. The GPS is required to provide 6 meter rms URE. For the same test period, the GPS Operational Control System (OCS) computed URE performance measures of 2.0 meters (rms) and 2.5 meters (rms). This suggests that these GPS performance measures might be improved. Throughout the 30 day test, users reported that the daily rms URE were approximately steady-state. However, just prior to the test, the rms URE did appear correlated over several days with rms values near 6 meters. This URE degradation appeared to improve as NAVSTARS 3,6, and 10 were less and less eclipsed by the Earth shadow.

http://tf.boulder.nist.gov/general/pdf/2605.pdf

GPS Satellite-to-User Range Accuracies: A Calibration Experiment

A time comparison system using the ranging signal of the geostationary meteorological satellite (GMS) of Japan has been developed, and GMS measurements have been carried out between Korea Standards Research Institute (KSRI), Korea and Communications Research Laboratory (CRL), Japan. The result of the time comparison has shown that the precision of the GMS time comparison system at KSRI is about 10 ns. The GMS time-comparison system can be used for T/F transfer in the Asian and surrounding oceanic area with a precision of several tens of nanoseconds. >

Time comparisons between KSRI and CRL via the geostationary meteorological satellite of Japan

In the Time Service Department of the U.S. Naval Observatory, there are several operational programs that utilize time from the Global Positioning System (GPS) satellites in one form or another.



1
The monitoring of GPS time, derived from the ensemble of satellites, to ensure that it stays within one microsecond of the U.S. Naval Observatory Master Clock and to determine the quality of its performance between uploads.

2
The monitoring of the individual spacecraft clocks to determine their performance, both over the short term and the long term.

3
The monitoring of Coordinated Universal Time (UTC) as derived from GPS time in order to ensure that the accuracy of GPS as a time distribution system is good to 100 nanoseconds.

4
The performance of common-view time transfers between the Naval Observatory and other worldwide laboratories, to monitor timescales and to investigate signal propogation through the ionosphere.





This paper describes these four projects and discusses their importance to the Global Positioning System and to the world timing community.

W. J. Klepczynski

Papers

Operational results of GPS in timekeeping