augmentation

January 10, 2012

GLONASS Modernization: Maybe Six Planes, Probably More Satellites

By GPS World Staff

December 1, 2011

The System: EGNOS Toolkits Enhance GPS Accuracy

By GPS World Staff

July 1, 2011

Integrity for Non-Aviation Users: Moving Away from Specific Risk

By GPS World Staff

Figure 1. Left, the orbit path of three QZSS satellites will eventually keep at least one of them directly over Japan at all times. Right, the inclined geosynchronous orbit of the fifth Compass satellite, launched in July, has a similar ground track and mission goal.

September 1, 2010

The System: Michibiki Takes Up Station and Other GNSS Constellation Updates

By Alan Cameron

May 1, 2010

The System: Galileo ICD, Free at Last

By GPS World Staff

FIGURE 9. The combined dual frequency availability of the SBASs with the southern hemisphere stations is shown.

March 1, 2010

Future Augmented: Coverage Improvement for Dual-Frequency SBAS

By GPS World Staff

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