[gps-talkusers] Re: GPS receivers
- From: "Michael May" <mikemay@xxxxxxxxxxxxxxxx>
- To: <gps-talkusers@xxxxxxxxxxxxx>
- Date: Wed, 27 Feb 2013 15:11:23 -0800
Les,
More sensitive receivers become important among buildings and canyons. In
the open, it doesn't much matter what you have.
The acquisition time will be impacted the same way.
Mike
-----Original Message-----
From: gps-talkusers-bounce@xxxxxxxxxxxxx
[mailto:gps-talkusers-bounce@xxxxxxxxxxxxx] On Behalf Of Les Kriegler
Sent: Wednesday, February 27, 2013 8:55 AM
To: gps-talkusers@xxxxxxxxxxxxx
Subject: [gps-talkusers] Re: GPS receivers
Hi Mike,
Thanks for the detailed explanation about GPS receivers. If one travels in
an urban area, will the iPhone receiver perform comparably to an external
receiver? Also, can you comment on acquisition time of these receivers
versus the iPhone's built-in receiver? Thanks.
Les
-----Original Message-----
From: gps-talkusers-bounce@xxxxxxxxxxxxx
[mailto:gps-talkusers-bounce@xxxxxxxxxxxxx] On Behalf Of Michael May
Sent: Wednesday, February 27, 2013 9:43 AM
To: gps-talkusers@xxxxxxxxxxxxx
Subject: [gps-talkusers] GPS receivers
Great to see all the conversation. Do please change up the subject line so
we can track the different threads.
We have been testing the Garmin Glo GPS receiver. It is one approved by
Apple for the iPhone. Because it receives at a rate of 10 times per second
versus the once per second of other receivers, it won't easily work with our
notetakers. Chris did get it to work but it wasn't simple.
It will definitely be more sensitive and acquire in more places than the
built-in iPhone GPS. Remember again that when the iPhone shows a position,
it can be quite inaccurate if in fact it has no GPS signal and is just using
the cell signals.
GPS receivers have a sensitivity rating, the lower the DBM, the more
sensitive. The better receivers like the iBlue and QSTARZ have been in the
minus 150 to 160 range. The Garmin Glo is in the minus 180 range.
It sells for around $99. Here is one more benefit as copied from the Garmin
website.
GLO can receive position information from both the GPS and GLONASS satellite
constellations, allowing it to connect to up to 24 more satellites than
devices that rely on GPS alone. This allows GLO to lock on to satellites
approximately 20 percent faster and remain connected even at high speed.
What's more, GLO updates its position information at 10 times per second -
that's up to 10 times more often than the GPS receivers in many mobile
devices.
Michael 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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