In this section, you may select from many GPS references. If you experience any broken links please report them to our Navigation Information Service.
GPS General References
GPS Week Number Rollover
GPS SPS Performance Standard
GPS Technical References
GPS Satellite Antenna Panel Patterns
These documents describe technical characteristics of the antenna panels on the GPS Block IIR and Block IIR-M satellites. The satellite manufacturer, Lockheed Martin, compiled the information based on its design specifications and ground test measurements of the antenna panels. This link to Lockheed Martin's website is not meant to endorse any company products or views.
IS-GPS-200 Navstar GPS Space Segment/Navigation User Interfaces
IS-GPS-800 Navstar GPS Space Segment/User Segment L1C Interface
IS-GPS-705 Navstar GPS Space Segment/User Segment L5 Interface
Navstar GPS Control Segment to User Support Community Interfaces
ICD-GPS-060 GPS User Equipment (Phase III) Interface Control Document for the Precise Time and Interval (PTTI)
GPS User Equipment Introduction
Space and Weather sites