Last week’s Supreme Court ruling on GPS use for tracking criminal suspects makes U.S. law clear on this issue going forward, but it does not address tracking for commercial aspects. One U.S. newspaper editorialized, “the unanimous decision failed to resolve troubling questions about the privacy...More>>

LONDON — Technical conferences usually feature hits: advances in technology, new form factors, improved signal processing. But the opening day of the European Navigation Conference in London has dwelt instead on misses: vulnerabilities, threats, weaknesses that leave GNSS increasingly open to...More>>

We published a news story recently suggesting that Albert Einstein, the Mighty Hip Einie, got one thing wrong, or at least not quite totally right: the universal upper limit constituted by the speed of light. Precise-timing GPS receivers in a Geneva lab helped indicate that subatomic neutrinos can...More>>

China's GNSS, Compass or Beidou, intends to publish its signal interface control document (ICD) in October. Representatives of the system made an unprecedented showing at ION GNSS in Portland, and referred frankly to "internal deliberations" that may be at the root of much of the public uncertainty...More>>

The difference between navigation and communication signals — a key point not well or not at all understood in Washington — and an FCC rule that could cause LightSquared to foot substantial GPS refitting bills even if it prevails to interfere, were two of several subjects that came to light in...More>>

August's letters to the editor.More>>

You’ve got to put some in yourself, to get some out. Don't expect the FCC to make a rational decision in the Lightsquared versus GPS case. As clear as the conclusions may seem to an engineering mind examining the Technical Working Group’s report on the subject, the Federal Communications...More>>

Recent events, some of them summarized here, may appear to have dealt setbacks to LightSquared, the boundless opportunist of wireless broadband that just happens to interfere with GPS. But the company has not run out of moves yet. Would you, if you had $20 billion at stake? The latest gambit, led...More>>

Results from the LightSquared/GPS testing just concluded in the field near Las Vegas, Nevada, may produce overly optimistic results regarding the effects of the LightSquared signal on GPS receivers. This is because the LightSquared equipment may be broadcasting at lower-than-planned levels for its...More>>

Herein follow all the questions posed, broken into several topic groups. Some answers have been given. For many questions, we haven’t marshaled the time or energy to address – or maybe we plain don’t know. But the process is open for you to contribute. If you would like to suggest an answer...More>>