[gps-talkusers] Re: clarifications
- From: "Chip Orange" <Corange@xxxxxxxxxxxxxxx>
- To: <gps-talkusers@xxxxxxxxxxxxx>
- Date: Thu, 20 May 2004 13:59:09 -0400
One advantage, is that in what are called "urban canyons", where
satellites may drop in and out due to temporary blocking of the signal
by buildings, the earthmate claims to continue to track your position
accurately with as few as 2 satellites.
Their reasoning is quite sound, and rather obvious once you think about
it; it goes: If once we ever get an exact position fix (using 4
satellites), and we drop to 3 (where the altitude is not known), we'll
go on assuming the previous altitude. If we drop to 2 satellites (which
yields, via a mathematical algorithm, an answer of 2 possible positions
on the surface of the earth), we'll use the one that was closest to the
last known position when we had more satellites.
Otherwise, as Mike as already detailed, it's faster and smaller, and has
no buttons or screen to deal with. It also has WAAS, which greatly
increases positional accuracy in north america, but evidently the
Magellan 310 does not have this (I didn't know you could still buy a GPS
receiver which didn't have WAAS capability).
(sorry if I'm a little late on this thread, I'm behind in my reading).
Chip
=20
> -----Original Message-----
> From: Jan Stirbens [mailto:jstirbens@xxxxxxxxxxxxx]=20
> Sent: Thursday, March 18, 2004 12:43 PM
> To: GPS-TalkUsers@xxxxxxxxxx
> Subject: Re: clarifications
>=20
> Hello:
>=20
> What is the difference between the Earthmate and the Sportrak=20
> scanner? I just purchased the Sportrak receiver and am new=20
> to GPS. Are there many advantages of purchasing the=20
> Earthmate over the Sportrak?
>=20
>=20
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> > ----- Original Message -----
> >From: Michael May <MikeMay@xxxxxxxxxxxxxxxx
> >To: GPS-TalkUsers@xxxxxxxxxx
> >Date: Thu, 18 Mar 2004 08:12:26 -0800
> >Subject: Re: clarifications
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> >Wendy,
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> >The Earthmate receiver would be selected with the Garmin=20
> item under the=20
> >GPS Options menu.
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> >The price is for a receiver with nothing to do with software=20
> or maps.=20
> >It is the receiver we are shipping with the GPS package now.=20
> If someone=20
> >already has the BrailleNote GPS and wants to upgrade to this=20
> receiver,=20
> >they can order it and perhaps sell their Sportrak on EBay.
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> >Mike
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> >At 07:50 AM 3/18/2004, you wrote:
> >>Mike:
> >>Does the Earthmate price include maps for new customers or is the=20
> >>price on the web page for people who already have the maps?=20
> Also, as=20
> >>it is not a Magellan or a Garman what option would be used=20
> for setting=20
> >>up the Braille Note with Earthmate?
> >>At 06:56 AM 3/18/04 -0800, you wrote:
> >>>Hello from CSUN.
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> >>>I have received a few private emails generated by our=20
> press release=20
> >>>and by some of you going to the Sendero web site.
>=20
> >>>I didn't mention in the release that we are distributing a=20
> very cool=20
> >>>and unique tactile watch. This actually has a remote link=20
> to GPS. The=20
> >>>company that developed it was also working on a GPS watch and they=20
> >>>were presenting the GPS
> >>> watch in a session with me at the ION conference 3 years=20
> ago. The =20
> >>>developer thought I'd be interested in a new way of=20
> reading a watch =20
> >>>tactually and showed me an early prototype. They have now=20
> asked if we =20
> >>>would distribute the watch in the U.S. It just came out a=20
> few months =20
> >>>ago. There is a short description on the Sendero site and we will =20
> >>>enhance that description shortly.
>=20
> >>>Basically, there is a solid vibration for the hour hand and a=20
> >>>pulsating vibration where the minute hand is. Normal=20
> tactile markings=20
> >>>surround the crystal but of course there is no need for=20
> the crystal=20
> >>>to open. The watch is submersible and very attractive. It=20
> is also nearly $400.
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> >>>I asked the developers if we could connect it to a GPS=20
> system so you=20
> >>>could get vibrating directional information. I don't think they=20
> >>>thought I was serious.
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> >>>The Earthmate receiver is available on the Sendero web=20
> site and is shipping.
>=20
> >>>The indoor navigation device is strictly in early=20
> prototype testing=20
> >>>and has a long way to go before it is commercial and even longer=20
> >>>until it is affordable.
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> >>>The new software version is still in alpha testing with additional=20
> >>>features being developed. We just wanted folks to know=20
> your input was=20
> >>>being converted to code. No indication of when that will=20
> come out as=20
> >>>there is lots to add and test still.
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> >>>Mike
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>=20
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> >>>Michael G. May
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> >>>CEO Sendero Group
>=20
> >>>Developers and distributors of BrailleNote GPS Now distributing=20
> >>>BrailleNote, VoiceNote and Miniguide
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> >>>MikeMay@xxxxxxxxxxxxxxxx
> >>>http://www.SenderoGroup.com
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> >>>(530) 757-6800, Fax (530) 757-6830, Mobile (530) 304-0007 Sendero=20
> >>>Group, LLC
> >>>1118 Maple Lane, Davis, CA 95616-1723, USA
>=20
>=20
> >>Wendy
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>=20
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> >Michael G. May
>=20
> >CEO Sendero Group
>=20
> >Developers and distributors of BrailleNote GPS Now distributing=20
> >BrailleNote, VoiceNote and Miniguide
>=20
> >MikeMay@xxxxxxxxxxxxxxxx
> >http://www.SenderoGroup.com
>=20
> >(530) 757-6800, Fax (530) 757-6830, Mobile (530) 304-0007 Sendero=20
> >Group, LLC
> >1118 Maple Lane, Davis, CA 95616-1723, USA
>=20
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