News
Three's the Challenge July 20, 2010 By: André Hauschild,Oliver Montenbruck,Peter Steigenberger,Richard B. Langley
A small variance in the L5 signal, which remains well within signal specifications and will not affect pseudorange measurements, may show some impact on triple-frequency combinations of the signal’s carrier phase in high-precision applications. Observations suggest a temperature-dependent line...more >>
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GPS L5: The Real Stuff June 18, 2010 By: André Hauschild,Michael Meurer,Oliver Montenbruck,Peter Steigenberger,Richard B. Langley,Stefan Erker
The L5 signal of the new Block IIF satellite shows a very favorable signal strength (Fig. 1), which is somewhere in between the L1 and L2C signal strength for the employed antenna and slightly higher than that of the GIOVE-A/B satellites. While the L5 test signal of the second-last Block IIR-M...more >>
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Evaluating the Performance of GPS/GIOVE Integrated Precise Point Positioning June 10, 2010 By: André Hauschild,Landon Urquhart,Marcelo Santos,Oliver Montenbruck,Peter Steigenberger,Richard B. Langley,Wei Cao
Precise point positioning (PPP) has gained an increasing importance with the availability of precise orbit and clock information, for example from the International GNSS Service (IGS). Whereas PPP was limited in the past to post-processing due to the latency of the precise satellites ephemerides,...more >>
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CONGO: First GPS/GIOVE Tracking Network for Science, Research September 1, 2009 By: André Hauschild,Oliver Montenbruck,Peter Steigenberger,Urs Hugentobler,Uwe Hessels
Selected results from the COoperative Network for GIOVE Observation (CONGO) demonstrate how the global network provides early familiarization with the new Galileo signals and access to precise GIOVE orbit and clock information, to develop new processing techniques for multi-constellation,...more >>
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Innovation: L5 Signal First Light June 1, 2009 By: André Hauschild,Michael A. Temple,Michael Meurer,Oliver Montenbruck,Richard Langley,Stefan Erker,Steffen Thölert
Great excitement surrounds the activation of a new transmitter from a satellite — an occasion dubbed first light. Research groups around the globe joined the GPS Wing in monitoring and analyzing the first L5 signals from space. We describe the equipment and procedures used to capture and analyze...more >>
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