Ensemble time and frequency stability or GPS satellite clocks

Autor:	T.K. Peppler, D.W. Allan
Rok vydání:	2003
Předmět:	business.industry Computer science Ranging Geodesy Stability (probability) Software Rubidium standard ComputerSystemsOrganization_MISCELLANEOUS Assisted GPS Electronic engineering Global Positioning System Satellite business Constellation
Zdroj:	Proceedings of the 42nd Annual Frequency Control Symposium, 1988..
DOI:	10.1109/freq.1988.27641
Popis:	In anticipation of cross-link ranging in the Global Positioning System (GPS) and the establishing of GPS ensemble time, the frequency stability characteristics of the clocks in the constellation were investigated. Once those characteristics were ascertained, the clock readings were optimally combined using the NBS time-scale-algorithm software to generate a GPS space clock ensemble. Frequency drifts of some parts in 10/sup 16/ per day were observed in the GPS cesium beam frequency standards on board the space vehicles. The GPS space clock ensemble frequency stability reached about 2 parts in 10/sup 14/. This is comparable to some of the best clock ensembles at major timing centers throughout the world. >
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::daffb07430a5b08ec374e2f79205cc35 https://doi.org/10.1109/freq.1988.27641 Zobrazit plný text záznamu