[gps-talkusers] Re: accuracy among trees
- From: "Michael May" <mikemay@xxxxxxxxxxxxxxxx>
- To: <gps-talkusers@xxxxxxxxxxxxx>
- Date: Thu, 21 Jun 2012 06:46:00 -0400
Marco,
I wouldn't expect the GPS signal to get through any kind of metal siding.
Yes, there are batteries for the 747.
It would be interesting for you to record a Replay when you are in some of
those remote areas, especially among the trees. Then others can check out
your route and we could also see what the coverage was like.
Sounds fun.
Mike
-----Original Message-----
From: gps-talkusers-bounce@xxxxxxxxxxxxx
[mailto:gps-talkusers-bounce@xxxxxxxxxxxxx] On Behalf Of Marco Migotti
Sent: Thursday, June 21, 2012 1:29 AM
To: gps-talkusers@xxxxxxxxxxxxx
Subject: [gps-talkusers] Re: accuracy among trees
Since I live in a house with aluminum siding, I find that it is hard to get
more than 3 satelites indoors but haven't yet gotten the chance to try the
forest yet to see its sensitivity. I'm really happy with the 747 so far and
it has incredible battery life too. My next vacation involves taking a trip
along the Alaska highway between dawson creek bc to Haynes junction in
Alaska. I'm planning to use sendero for the journey and I am sure I'll find
lots of places to test out the forest sensitivity. From what I can tell
about the length of the highway and the scarcity of towns along it, I'm
planning to purchase a couple more batteries for my voicenote. Is there a
spare battery available for the IBlue 747? '
Marco
-----Original Message-----
From: gps-talkusers-bounce@xxxxxxxxxxxxx
[mailto:gps-talkusers-bounce@xxxxxxxxxxxxx] On Behalf Of Michael May
Sent: Wednesday, June 20, 2012 1:15 PM
To: gps-talkusers@xxxxxxxxxxxxx
Subject: [gps-talkusers] accuracy among trees
Hello list,
The GPS accuracy is so much better with the iBlue 747 Pro that we hardly
bring up accuracy questions like we used to. Certainly there are multi path
issues among tall buildings but we still get a position fix. It amazes me
sometimes how well it works in some buildings.
Most of my GPS use in the woods is in Northern California where you have
tall trees but mostly with pine needles and not leaves. I find that it takes
longer to acquire a position among these tall trees but eventually the GPS
comes through with 3 or 4 satellites. It is rare that I cannot get a
position fix at all.
I am wondering how true this is in other parts of the US or world where the
trees may be denser and with leaves instead of needles. Based on the physics
of GPS frequencies, leaves that are effectively 8 inches or larger would
potentially block GPS signals.
Anyone have wooded areas where they cannot get a GPS fix?
Mike
May, CEO Sendero Group
Developers of accessible GPS and distributors of technology for the blind
Office Phone: 888-757-6810, extension 101
Email: MikeMay@xxxxxxxxxxxxxxxx
Sendero web: http://www.senderogroup.com General GPS Web:
http://www.AccessibleGPS.com Mike May Personal:
http://www.CrashingThrough.com
Sendero Address: 1857 Glenmark Way, Roseville, CA 95747
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