Ensembling clocks of Global Positioning System

Author

Satin, Arthur L. ; Leondes, Cornelius T.

Author_Institution

Aerosp. Corp., Los Angeles, CA, USA

Volume

Issue

fYear

1990

fDate

1/1/1990 12:00:00 AM

Firstpage

Lastpage

Abstract

The Global Positioning System (GPS) is a satellite navigation system capable of providing 15-m position accuracy. Its system time reference is currently one of the monitor station clocks. Using a simple two-clock example, it is shown analytically that improved reference time stability and overall state estimation accuracy can be achieved by constructing GPS time as an ensemble of all system clocks and that the problem of covariance divergence can be handled by the introduction of pseudomeasurement processing

Keywords

clocks; measurement standards; radionavigation; satellite relay systems; time measurement; Global Positioning System; covariance divergence; measurement standards; monitor station clocks; pseudomeasurement processing; reference time stability; satellite navigation; state estimation accuracy; time reference; Clocks; Covariance matrix; Equations; Filters; Global Positioning System; Monitoring; Navigation; Phase measurement; State estimation; White noise;

fLanguage

English

Journal_Title

Aerospace and Electronic Systems, IEEE Transactions on

Publisher

ieee

ISSN

0018-9251

Type

jour

DOI

10.1109/7.53415

Filename

53415

Link To Document

https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1343078