OEM

Figure 2. GPS is visible in the spectrum only if a narrow resolution bandwidth is used. This spectrum was obtained with a center frequency of 1575.42 MHz, a frequency span of 4 MHz, a resolution bandwidth of 10 Hz, root-mean-square averaging with 20 averages, and a reference level of 250 dBm.

October 1, 2010

Innovation: Record, Replay, Rewind

By Richard B. Langley

October 1, 2010

Letter to the Editor: History Articles Set Record Straight

By GPS World Staff

September 1, 2010

Spoofing Detection and Mitigation with a Moving Handheld Receiver

By GPS World Staff

September 1, 2010

Challenged Positions: Dynamic Sensor Network, Distributed GPS Aperture, and Inter-nodal Ranging Signals

By GPS World Staff

June 25, 2010

Spectracom Releases 8-Channel GPS Simulator for Nav Device Testing

By GPS World Staff

At the JPO. Frank Butterfield of Aerospace, Col. Parkinson, and Cdr. Bill Huston, deputy JPO director from the U.S. Navy, in the early 1970s. A model of a Phase I GPS satellite stands on the table between the latter two. (Credit: Bradford W. Parkinson and Stephen T. Powers)

June 1, 2010

Part 2: The Origins of GPS, Fighting to Survive

By GPS World Staff

Mathematician Bill Guier (l) and physicist George Weiffenbach (r), told APL Research Center director Frank T. McClure (c), about their success using Doppler tracking for satellites. “McClure’s brain started going into fast forward,” remembered John Dassoulas. “Knowing the navigational challenges the U.S. Navy faced, McClure said, ‘Well, if you can find out where the satellite is, you ought to be able to turn that problem upside down and find out where you are.’" (Credit: Bradford W. Parkinson and Stephen T. Powers)

May 1, 2010

Part 1: The Origins of GPS, and the Pioneers Who Launched the System

By GPS World Staff

Figure 8. (a) Frequency distribution of 12 1-hour samples of GPS height data; (b) the 12 1-hour samples combined.

May 1, 2010

Innovation: Accuracy versus Precision

By Richard B. Langley

April 12, 2010

Aeroflex Introduces Portable Positional Simulator for GPS/Galileo Receivers

By GPS World Staff

April 1, 2010

Innovation: GPS by the Numbers

By Richard B. Langley

Innovation: Record, Replay, Rewind

Letter to the Editor: History Articles Set Record Straight

Spoofing Detection and Mitigation with a Moving Handheld Receiver

Challenged Positions: Dynamic Sensor Network, Distributed GPS Aperture, and Inter-nodal Ranging Signals

Spectracom Releases 8-Channel GPS Simulator for Nav Device Testing

Part 2: The Origins of GPS, Fighting to Survive

Part 1: The Origins of GPS, and the Pioneers Who Launched the System

Innovation: Accuracy versus Precision

Aeroflex Introduces Portable Positional Simulator for GPS/Galileo Receivers

Innovation: GPS by the Numbers

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