Here are links to other web sites which you may find useful.

	American National Standards Institute - Home Page
	British Approvals Board for Telecommunications - Home Page
	British Standards Institution - Home Page
	Updated daily. Just to show that we have a sense of humour!
	European Space Agency
	European Telecommunications Standards Institute - You can download relevant standards from this site.
	Galileo European Satellite Navigation System
	Galileo Joint Undertaking
	Global Positioning System
	GPS & GLONASS Satellite Tracking
	International Telecommunications Union - You can download relevant standards from this site.
	Knowledge Transfer Network
	National Institute of Standards and Technology - Workshop on Synchronisation in Telecommunication Systems.
	The National Physical Laboratory run the Time and Frequency User Group in the UK.
	Nigel Allen's online library of useful telecoms information/contacts etc.
	Ofcom is the regulator for the UK communications industries, with responsibilities across television, radio, telecommunications and wireless communications services.
	The Russian Federation Information Centre - GLONASS information.
	WORLDTIME® is a service featuring an interactive world atlas, information on local time, as well as sunrise and sunset times in several hundred cities, and a database of public holidays worldwide.
	United Kingdom Accreditation Service - Home Page
	US Coastguard Navigation Centre
	Time Service Department of the US Naval Observatory. Good info on GPS plus time of day.