The L5 Signal I wish to second Jim Spilker’s comments in his recent letter to the editor regarding the two wonderful GPS history articles by Brad Parkinson. My endorsement of his comments also inclu...
Read More →Covers from 1990, 1994, and 1998. Two Decades of GNSS Products Question: How has your product and services mix changed, with the evolution of GNSS technology and users, since 1990 (or since you...
Read More →A Close Look at GPS SVN62 Triple-Frequency Signal Combinations Finds Carrier-Phase Variations on the New L5 By Oliver Montenbruck, André Hauschild (DLR/German Space Operations Center), Peter Steigen...
Read More →By The Masked Engineer In a few weeks, we will again observe the tragic anniversary of the 9/11 attacks on the United States. This will mark nearly a full decade since that terrible day that changed ...
Read More →It has long been accepted that we may reasonably expect any new technical device to have some growing pains. If you examine the history of the space program you will discover evidence of this. In the ...
Read More →Greg Turetzky by Greg Turetzky I started my relationship with GNSS and Moore’s Law in 1985, writing software for GPS tracking loops on the Advanced Range Instrumentation Aircraft program at the Appl...
Read More →At press time, GPS spacecraft IIF-1 was set to be launched May 27 from Cape Canaveral Air Force Station in Florida. This first of a new generation of satellites will travel quickly — instead...
Read More →By Brady O’Hanlon, Mark L. Psiaki, Paul M. Kintner Jr., and Steven P. Powell Anomalous behavior of the L1 C/A-code carrier phase has been detected on PRN07/SVN-48. The anomalies are sudden step-...
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