[amsat-bb] Re: Playing with GPS
aa5pk at suddenlink.net
Sun Jul 25 17:19:17 PDT 2010
Garmin claims 15 meters average accuracy on their Web site.
----- Original Message -----
From: "Nigel Gunn G8IFF/W8IFF" <nigel at ngunn.net>
To: "Lee Ernstrom" <iamsavedbygrace at q.com>
Cc: <amsat-bb at amsat.org>
Sent: Sunday, July 25, 2010 6:37 PM
Subject: [amsat-bb] Re: Playing with GPS
> Nobody guarentees your GPS to be accurate to within 30 feet and neither does Google maps.
> My GPS usually claims around 10-12 feet accuracy provided it can see around 10 satellites.
> Leave your GPS on laying in your yard for a couple of hours plotting it's course and see how far it wanders.
> On 25-Jul-10 22:55, Lee Ernstrom wrote:
>> Hi Guys,
>> I have been playing around with my Garman NUVI GPS and comparing the
>> readings to Google Maps. This is something you call try at home. My
>> Garman says that the base of my HF tower is at 41.07430 N 112.03774 W.
>> When I punch in those coordinates in to Google Maps in the satelite view
>> mode the arrow points to a location about 30 feet away near the middle
>> of the lawn east of my driveway. When I play around with the
>> coordinates a little through interpolation and punch them in to Google
>> Maps several times I arrive at what appears to be the true coordinates
>> of the base of my HF tower at 41.074329 N 112.037770 W. I suppose that
>> is the significant difference that sixth decimal place makes. Check
>> both of these coordinates on Google Maps to see what I mean. Any
>> Lee Ernstrom
>> Syracuse, Utah DN31xb
>> Sent via AMSAT-BB at amsat.org. Opinions expressed are those of the author.
>> Not an AMSAT-NA member? Join now to support the amateur satellite program!
>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
>> No virus found in this incoming message.
>> Checked by AVG - www.avg.com
>> Version: 9.0.851 / Virus Database: 271.1.1/3026 - Release Date: 07/24/10 18:36:00
> Nigel A. Gunn, 1865 El Camino Drive, Xenia, OH 45385-1115, USA. tel +1 937 825 5032
> Amateur Radio G8IFF W8IFF (was KC8NHF), e-mail nigel at ngunn.net www http://www.ngunn.net
> Member of ARRL, GQRP #11396, QRPARCI #11644, SOC #548, Flying Pigs QRP Club International #385,
> Dayton ARA #2128, AMSAT-NA LM-1691, AMSAT-UK 0182, MKARS, ALC, GCARES, XWARN.
> Sent via AMSAT-BB at amsat.org. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
More information about the AMSAT-BB