[gps-talkusers] Re: A general question

When you are over an area that isn't mapped or you don't have maps for, the
A and C commands will give you the message, " position unknown" 

It is great to hear your story of using the GPS as a new user. 

It looks like you are picking up things quite well and experimenting as you
used it during flight.

For better GPS coverage on a plane, it is best that the receiver is placed
against the window. Honestley, it wouldn't make a difference if you had 10
feet accuracy as compared to 50 feet when you are traveling at 500MPH and at
40,000 feet.

Thanks, 
 
Kevin 
I would encourage you to visit the Chaos World of Assistive Technology Blog
at: 
http://www.chaosat.wordpress.com/
Postings are dealing with the latest and greatest happenings, tips and
tricks and other items of interest. 

-----Original Message-----
From: gps-talkusers-bounce@xxxxxxxxxxxxx
[mailto:gps-talkusers-bounce@xxxxxxxxxxxxx] On Behalf Of George B
Sent: Thursday, May 29, 2008 9:50 AM
To: gps-talkusers@xxxxxxxxxxxxx
Subject: [gps-talkusers] Re: A general question

You need to have the state maps loaded for each state the plane is flying
over so if you are over a state and it is not in your map folder you will
not get any a or c commands, but you will get speed and alt. because that is
a sat to recerver only and does not need a map only a software to receiver
to sat connection.

> -----Original Message-----
> From: gps-talkusers-bounce@xxxxxxxxxxxxx [mailto:gps-talkusers- 
> bounce@xxxxxxxxxxxxx] On Behalf Of Donald L. Roberts
> Sent: Thursday, May 29, 2008 09:44
> To: gps-talkusers@xxxxxxxxxxxxx
> Subject: [gps-talkusers] A general question
> 
> As a user of the Sendero product for less than two weeks along with my 
> recently acquired Mpower BT, I am enjoying learning the uses of this 
> marvelous toy.
> 
> I recently took it on a jet plane from Minneapolis to Sacramento which 
> prompts me to ask this question.  I had the window seat on this flight 
> and fastened the Holux 236 to my shirt collar, so it was relatively 
> close to the window.  It took the Holux perhaps two minutes to acquire 
> a fix, and signal quality was only fair with five satellites as I 
> recall.  And now for the question.  Why did neither the A command nor 
> the C command yield any information?  I do not recall verbatim the 
> response, but the bottom line was that it could not seem to get a fix.  
> Conversely, I was able to determine both speed and altitude.  So the 
> question is why could I not ascertain the nearest city or LL 
> coordinates?
> I am certain there is a logical reason for this, but I am too new at 
> this sort of thing to understand the fine points.
> 
> Thanks for any responses.
> 
> Don Roberts



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