Article: 9149 of sci.geo.satellite-nav From: "Paul Nutt" Newsgroups: sci.geo.satellite-nav Subject: Re: Sept 27 - GPS off by up to 5 miles - Anyone notice? Date: Mon, 1 Oct 2001 22:23:44 -0700 Organization: Posted via Supernews, http://www.supernews.com Message-ID: References: <9p353j$so7$1@samba.rahul.net> <3BB5D6B1.64925075@home.com> X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 X-Complaints-To: newsabuse@supernews.com Lines: 51 Path: news.meer.net!sea-read.news.verio.net!dfw-artgen.news.verio.net!dfw-peer.news.verio.net!news.verio.net!newsfeed.mathworks.com!feeder.qis.net!sn-xit-02!sn-post-02!sn-post-01!supernews.com!corp.supernews.com!not-for-mail Xref: archive.mv.meer.net sci.geo.satellite-nav:9149 Hello from: N45 32 56.5 W122 37 30.5 "DO" wrote in message news:shgerto0k1ult6cjfll52hvqca886khsfp@4ax.com... > On Sat, 29 Sep 2001 14:15:10 GMT, Peter Rathmann > wrote: > > >Gilles Kohl wrote: > >> > >> Clarence, > >> > >> On 29 Sep 2001 00:37:07 GMT, dold@34.usenet.us.com wrote: > >> > >> >A few weeks ago, I turned on my eTrex yellow inside the house, hooked up to > >> >my computer to download some tracks. There was a query on this group about > >> >something to do with Streets & Trips, so I brought up S&T. I watched my > >> >little car icon drifting south, at 100+ mph, wandering off the Southern > >> >Coast of California. I suppose that it started at my house in Northern > >> >California, but had hit open ocean before I noticed ;-) > >> >The eTrex display agreed with S&T. I don't get very good lock inside the > >> >house, with one or two satellites locked most of the time. > >> > >> Does the eTrex have a simulator mode ? May you have activated it > >> unnoticedly ? > > > >I've seen the same kind of behavior a couple times under poor reception > >conditions. It started up with a location far from the actual one and > >then settled on an erronious solution for position and speed. Mine > >showed me at an altitude of 1000' and speed of 725 mph over the north > >Pacific while I was actually on a bike path at about 15 mph. Once it > >got an additional satellite lock it switched back to the right place and > >speed. > > This happened to me one time with a GPSMap76. It showed my altitude > to be over 4000 feet (I live in Portland near sea level) and showed a > speed of over 700mph in some direction totally different from my > direction of travel. While I've never determined my Ford Bronco's top > speed, I suspect that it is somewhere below 110mph, so I'm fairly > certain that unless I entered some sort of time warp I wasn't > travelling at 700mph. > > The problem went on for about 30 seconds, and then stopped and has > never repeated itself.