학술논문
Ensembling clocks of Global Positioning System
Document Type
Periodical
Author
Source
IEEE Transactions on Aerospace and Electronic Systems IEEE Trans. Aerosp. Electron. Syst. Aerospace and Electronic Systems, IEEE Transactions on. 26(1):84-87 Jan, 1990
Subject
Language
ISSN
0018-9251
1557-9603
2371-9877
1557-9603
2371-9877
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.ETX