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Global Differential GPS System
About Us
System Description
- Overview
- Network
- Software
- References
Live Performance Monitoring
Customer Portal
Assisted GPS Data

The GDGPS System can, and does, provide every imaginable A-GPS product. Since we control our system end-to-end we can produce any GPS observable. Since we have deep understanding of GPS and develop our own software tools, we can derive any GPS by-product with the highest possible quality.

Our A-GPS products are geared to provide seamless global support to the wireless industry for cell-phone-based positioning, E911 services, etc. The following GDGPS products are typically used to support A-GPS services:

However, any other product of the GDGPS System, combinations thereof, or just reformatted versions of these products, may consititute a valuable A-GPS product. We recognize that there is no single standard for all A-GPS products, and we will be happy to customize any of our products to your special requirements.

With a global real-time tracking network of nearly 100 sites we achieve at least 10 fold redundancy in real-time coverage of the GPS satellites, globally and uniformly. This incredibly robust tracking infrastructure, combined with our redundant GDGPS Operations centers yields extremely reliable A-GPS products, with better than 99.999% track record of reliability to-date.

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 GPS Data
- Assisted GLONASS Data
- GLONASS corrections, orbit and clocks

- Automatic Precise Positioning Service
- Consulting
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