Research & Development

Source: Richard Langley

November 1, 2011

Innovation: Digging into GPS Integrity

By Richard B. Langley

Source: Richard Langley

October 1, 2011

Innovation: Filling in the Gaps

By Richard B. Langley

Source: Richard Langley

September 1, 2011

Innovation: The Right Attitude

By Richard B. Langley

Source: Richard Langley

July 1, 2011

Innovation: Multipath Minimization Method

By Richard B. Langley

Source: E. Simona Lohan, Mohammad Z. H. Bhuiyan, and Heikki Hurskainen

June 1, 2011

Innovation: MBOC Signal Options

By Richard B. Langley

Figure 1. Satellite tracking and carrier-phase anomaly summary during the observation time-span. These data were collected in a dense urban environment in both static and kinematic mode. The superimposed red-points show epochs where carrier-phase observables are either missing or contaminated with cycle slips, loss of locks, and/or other measurement anomalies.

May 1, 2011

Innovation: Doppler-Aided Positioning

By Richard B. Langley

Source: Richard Langley

April 1, 2011

Innovation: GLONASS

By Richard B. Langley

Source: Richard Langley

March 1, 2011

Innovation: Realistic Randomization

By Richard B. Langley

Courtesy of Richard and Marg Langley.

February 1, 2011

Innovation: GNSS and the Ionosphere

By Richard B. Langley

FIGURE 1. Overall concept of search and rescue system. (Image: Cospas-Sarsat)

January 1, 2011

Innovation: The Distress Alerting Satellite System

By Richard B. Langley

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