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Global Differential GPS System
About Us
System Description
- Overview
- Network
- Software
- References
Live Performance Monitoring
Customer Portal
Complete 50 bps Navigation Message

For assisted-GNSS (A-GNSS), E-911, and other applications requiring weak-signal acquisition-aiding techniques, the GDGPS System provides a global binary navigation data product, containing the navigation data stream from all transmitting GNSS satellites.

The multiply-redundant GDGPS tracking network enables majority voting schemes to ensure the integrity of this product, where every bit counts. This product is available redundantly from all three GDGPS Operations Centers (GOCs).

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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