[gps-talkusers] Re: Comparing two GPS elevation readings

Yes, but all things being equal, I find it interesting that they didn't come
up with the same variation.
I doubt there was one full second between my hitting the command on one,
then the other.
I realize GPS accuracy has that much variation.  It was more a comment about
the differences between the two units using the same model receiver,
reporting the same number of satellites, etc.
When it isn't snowing outside, I'll try it outside where they will certainly
get a clear shot at the sky.
We have no tall buildings around us.

Thanks,
Richard
 

-----Original Message-----
From: gps-talkusers-bounce@xxxxxxxxxxxxx
[mailto:gps-talkusers-bounce@xxxxxxxxxxxxx] On Behalf Of Ari Moisio
Sent: Thursday, December 18, 2008 10:48 AM
To: gps-talkusers@xxxxxxxxxxxxx
Subject: [gps-talkusers] Re: Comparing two GPS elevation readings


Hi Richard

  GPS altitude accuracy  is not as good as vertical  accuracy and depends
heavily on location of satellites. 20 to  30 meters (60 to 100 ft) is  a
typical altitude error and there might easily be more than 50 meters
variation within few minutes especially if the receiver does not have  a
good view to the sky.


--
mr. M01510 & guide Loadstone-GPS


On Thu, 18 Dec 2008, Richard Turner wrote:

> Greetings,
>
> I was curious about the elevation at our house due to some odd weather we
> are having.
> I have a Voice Sense with the latest Sense Nav, and a BrailleNote PK
running
> Sendero 5.2.  Both units are using a Holux m1000.
> Having them sitting side by side and the receivers in a window sill also
> side by side; the Voice Sense says we are at 269 feet, the PK says 226
feet.
> They both reported 18 feet accuracy with 9 satellites.
>
> I find that interesting.  Is that one of the differences with the 5.2
> release that may disappear once the Sense Nav is updated to the newest
SDK?
> Assuming they are going to do that of course.
>
> Thanks,
> Richard
>
>
>

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