On Thu, 7 Sep 2006 13:12:07 +0200 (CEST), "Bart Smit" <[EMAIL PROTECTED]> wrote:
> >On Wed, September 6, 2006 5:22, Christopher Hoover said: > >> [ the story seems overblown to me, but still worth sharing. follow >> the last link for some real data. - ch ] > >The last link is interesting indeed. Seems that the problems are more >perceived than real, with the GPS constellation operating well within >spec, but users wanting more. A more basic question. Do these degradations affect ordinary users? The reason I ask is that I have a GPS navigation system on in my truck 24/7 and use it every waking hour (I'm a retired engineer who's living a childhood fantasy - driving a long-haul 18-wheeler :-) Fairly frequently I experience fairly long intervals where the system goes completely dead. The satellite screen is all red - the system knows where the satellites are but no signal is received. This can last for miles. I've relocated the receiver, even stopping and removing the receiver from the truck just in case EMI was the culprit. Then just as quickly, the receiver gets lock and everything is fine. The distance traveled - sometimes 10 miles or more - during an outage is such that ground interference can fairly confidently be eliminated. Almost all my running is on open interstates so ground factors can be eliminated. I've gotten curious enough about this to bring along another receiver but so far nothing has happened to give me an opportunity to check with the second receiver. The system is Street Atlas with the Delorme Earthmate hockey-puck receiver. I've had this system about 4 years and it is only in the last few months that this has started happening. I'd attribute this to something in my receiver except that I recall also having occasional loss of signal on my other receiver, a Magellan Meridian Platinum, which I just attributed to "stuff happens". John --- John De Armond See my website for my current email address http://www.neon-john.com Cleveland, Occupied TN Don't let your schooling interfere with your education-Mark Twain _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
