As this issue goes to press in late August, the first Japan Aerospace Exploration Agency Quasi-Zenith Satellite System (QZSS) space vehicle, nicknamed Michibiki, holds steady for a September 11 launch...
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By John Nielsen, Ali Broumandan, and Gérard Lachapelle Ubiquitous adoption of and reliance upon GPS makes national and commercial infrastructures increasingly vulnerable to attack by criminals, terr...
Read More →Michibiki has more Twitter followers than you and me put together. All of you, and all of me with my 17 followers. Michibiki hit 16,284 when I signed on just now, and she (he?) has not yet even emerge...
Read More →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 ...
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