Exit Consulting
Exit Consulting is proud to offer the GPSClock

GPS for Computer Clock Synchronization
Introduction to clock synchronization.

U.S. Naval Observatory's Time Service Department
Information about the USNO and GPS operations.

Boeing's GPS pages
Boeing's Product page discussing the new GPS satellites.

Coast Guard Navigation Center
GPS system status reports and details.

NASA JPL's International GPS Services
GPS tracking information, archives, and FAQs.

TimeSynch
The main page for NTP software.

Tardis
Clock setting software for Windows machines.

Time Synchronization Server, NTP web page
Information on NTP software and links to other clock synchronization programs.

The Aerospace Corporation's GPS Primer
Introduction to GPS.

Global Positioning System Overview
Detailed description of GPS and GPS operations.

PPSKit for Linux
Ulrich Windl's Linux kernel patches for precise time keeping.

Hewlett Packard Application Note 1289, The Science of Timekeeping (PDF document)
Incredibly detailed 88 page introduction.

GPS for everyone (book)
Very readable book on GPS.

The GPS Manual: Principles and Applications (book)
Book that focuses on business applications of GPS.

GPS: Theory and Practice (book)
This book includes mathematical details.

Tick and Tock
We operate two stratum one time servers.

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