[gps-talkusers] Re: THe earthmate:
- From: "lazzaro" <lazzaro@xxxxxxxxxxxx>
- To: <gps-talkusers@xxxxxxxxxxxxx>
- Date: Fri, 4 Jun 2004 18:46:04 -0400
I was under the impression, perhaps mistakenly, that there were
professional portable GPS receivers that might increase the accuracy of
the system.
-----Original Message-----
From: gps-talkusers-bounce@xxxxxxxxxxxxx
[mailto:gps-talkusers-bounce@xxxxxxxxxxxxx] On Behalf Of Chip Orange
Sent: Friday, June 04, 2004 8:48 AM
To: gps-talkusers@xxxxxxxxxxxxx
Subject: [gps-talkusers] Re: THe earthmate:
This is the kind of question that belongs on the news groups
alt.satellite.gps and sci.geo.satellite-nav.
My understanding that what you're refering to as a "pro" unit costs many
thousands of dollars, and must remain stationary in one place for a very
long period of time to get a very accurate fix. I think they may
require the deployment of multiple antennas as well. It's nothing that
really would apply to us and our needs here.
Most of the time, with WAAS working (which does take up to 5 minutes
after starting the receiver, and is currently only in north america) the
accuracy is less than 3 meters. It's not likely you'll need more
accuracy than that, so what would you want out of a "pro" unit that
you're not getting at the moment?
The only other thing I can think of is that there are units which have
accelerometers built-in as well, which they use as part of a
"dead-reckoning" system for the times when they lose the satellite fix.
These are meant for people on the move, but again are many thousands of
dollars.
Chip
=20
> -----Original Message-----
> From: gps-talkusers-bounce@xxxxxxxxxxxxx=20
> [mailto:gps-talkusers-bounce@xxxxxxxxxxxxx] On Behalf Of lazzaro
> Sent: Thursday, June 03, 2004 7:38 PM
> To: gps-talkusers@xxxxxxxxxxxxx
> Subject: [gps-talkusers] Re: THe earthmate:
>=20
> I'm interested in using other receivers because we'd like to=20
>explore so called pro units. We're not even sure if the pro=20 models
>have higher accuracy. Is there a site that compares=20 the efficiency
>of GPS receivers so one can do a comparison? =20
>=20
> -----Original Message-----
> From: gps-talkusers-bounce@xxxxxxxxxxxxx
> [mailto:gps-talkusers-bounce@xxxxxxxxxxxxx] On Behalf Of Chip Orange
> Sent: Thursday, June 03, 2004 4:01 PM
> To: gps-talkusers@xxxxxxxxxxxxx
> Subject: [gps-talkusers] Re: THe earthmate:
>=20
>=20
> Mike will have to answer that one; my guess is that they are=20
> giving some special initialization command to the SportTrack=20
> that they don't give to any other model.
>=20
> While the BN may work with any GPS receiver, Sendaro would be=20
> taking on a lot of extra support issues if they made that=20
> claim. The earthMate is particularly easy for a blind person=20
> to deal with, but I bet there are models out there which aren't.
>=20
> If I were buying a receiver to go with the BN product, I=20
> wouldn't buy anything other than what Sendaro recommended=20
> without a very strong reason; and I would do it with the=20
> understanding that I may run into issues that are difficult=20
> to deal with. =3D20
>=20
> That being said, maybe you've got a good enough reason so=20
> that armed with the knowledge that all GPS receivers output=20
> the same data, you'd be willing to try one for some special=20
> reason. For instance, you may want to share one with a=20
> sighted spouse, so the spouse picks it out for its nice color=20
> display and maps or some other reason.
>=20
> Hth,
>=20
> Chip
>=20
> =3D20
>=20
> > -----Original Message-----
> > From: gps-talkusers-bounce@xxxxxxxxxxxxx=3D20
> > [mailto:gps-talkusers-bounce@xxxxxxxxxxxxx] On Behalf Of=20
> joe j lazzaro
> > Sent: Thursday, June 03, 2004 4:22 PM
> > To: gps-talkusers@xxxxxxxxxxxxx
> > Subject: [gps-talkusers] Re: THe earthmate:
> >=3D20
> > If the Sendero/Humanware BrailleNote GPS system is=20
> compatable=3D20 with
>=20
> >other receivers, I'm wondering why there are only two=3D20 =20
> listed on the
>=20
> >menu? If I were to use another unit not listed=3D20 on the=20
> menu, which=20
> >receiver should this be set to? =3D20 =3D20 Joseph J. Lazzaro =20
> >HTTP://JoeLazzaro.Com =3D20 =3D20 =3D20 =3D20
>=20
>=20
>=20
Other related posts: