Assisted GNSS Data
The GDGPS System provides a comprehensive suite of Assisted-GNSS (A-GNSS) products for the wireless industry and E911 applications. These products significantly reduce Time-To-First-Fix (TTFF) and enable positioning in weak-signal environments.
Our A-GNSS product suite includes:
- Predicted Orbit and Clock States - Long-term satellite orbit and clock predictions for GPS, GLONASS, Galileo, BeiDou, and QZSS
- Broadcast Ephemeris and Almanac - Validated broadcast navigation data with error detection and correction
- Complete 50 bps Navigation Message - Full navigation message stream with integrity verification through majority voting
- Embedded AEP Software - Autonomous ephemeris prediction software for embedded applications requiring no external connectivity
These products are designed to support various A-GNSS protocols and can be delivered through multiple distribution channels including TCP/IP streaming, FTP retrieval, and direct integration with wireless carrier networks.
The GDGPS multiply-redundant tracking network ensures continuous product availability from all three GDGPS Operations Centers (GOCs), providing the reliability required for safety-critical E911 applications.
Key Benefits
- Reduced TTFF: Significantly faster first fix in handsets
- Weak-signal acquisition: Positioning in urban canyons and indoor environments
- Multi-constellation support: GPS, GLONASS, Galileo, BeiDou, QZSS
- High reliability: Triple-redundant operations centers
- E911 compliance: Meets regulatory requirements for emergency location services
- Global coverage: Worldwide tracking network support