NASA Home Page JPL Home Page Caltech Home Page
NASA - Jet Propulstion Laboratory vertical separator + View the NASA Portal
JPL Home JPL - Earth JPL - Solar System JPL - Stars and Galaxies JPL - Technology
Global Differential GPS System
About Us
System Description
- Overview
- Network
- Software
- References
Live Performance Monitoring
Customer Portal
Assisted GLONASS Data

Assisted GLONASS (A-GLONASS) data are now available to GDGPS customers, to enhance the performance of GLONASS chipsets.

The GLONASS navigation message, the GLONASS broadcast ephemeris and the GLONASS Almanac are redundantly provided from all three GDGPS Operations Centers (GOCs). The GLONASS navigation message, bit-by-bit, is provided as a real-time UDP binary data stream. The broadcast ephemeris and Almanac are provided in RINEX-like file formats from the GDGPS sFTP servers with a few minute latency.

More information on GLONASS predictions can be found here

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
link to First Gov NASA logo