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Global Differential GPS System
About Us
System Description
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Live Performance Monitoring
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Integrity & Performance Monitoring

From monitoring the integrity of the GPS constellation, to situational awareness for theaters of operation, to the support of critical operations world-wide, the GDGPS System can assess the performance of the GNSS navigation signals in real-time.

JPL's network tracks each GNSS satellite with a denseR, global tracking network that provides extraordinary level of redundancy and the opportunity for strong majority voting schemes.

Our suite of monitoring tools provides customized alarm thresholds with as little as 4 seconds time to alarm, graphical and binary user interfaces, communications protocols, and around-the-clock operations for the most demanding applications. The GDGPS staff of engineers can tailor a performance monitoring application for your needs.

JPL GPS Integrity Monitor map
Snapshot from the JPL GPS Integrity Monitor web page (restricted access), depicting links between the GPS satellites and the ground tracking sites.

Real-time GNSS
Products & Services
Precise, Global, Reliable
- Embedded Autonomous Ephemeris Prediction (AEP) software
- Orbit & Clock Corrections
- Orbit & Clock States
- Broadcast Ephemeris & Almanac
- Complete 50 bps Navigation Message
- Global Ionospheric (TEC) Maps
- Raw Measurements
- Predicted Orbit & Clock States
- Integrity & Performance Monitoring
- Global Virtual Reference Network
- Assisted GNSS Data
- GLONASS corrections, orbit and clocks

- Automatic Precise Positioning Service
- Consulting
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