[Loadstone] Observations on Accuracy with Two Receivers

Shawn Kirkpatrick shawn at odyssey.cm.nu
Tue Oct 23 01:15:52 BST 2007

Any test you run indoors is probably invalid. This is because of multi-path 
and reflection issues. We've done a controlled test with three different 
receivers and the royaltek and holux receivers were quite good. The accuracy 
values are just an estimate of what the receiver thinks the accuracy is. The 
actual accuracy could be different. The value you got with the royaltek 
seems quite high. The holux using the mtk chipset will probably have more 
satellites. This means you'll probably have a signal in most conditions but 
the quality of that signal may not be that good sometimes.

On Mon, 22 Oct 2007, Michael O. Hanson wrote:

> Changing accuracy from a number to a number of feet was a great improvement.
> I don't want to start the great GPS receiver controversy or anything like
> that.
> Some users might find the information below helpful.  I do not claim that
> these test results are anything close to conclusive.  They are my
> observations.
> My testing was not performed under scientific or controlled conditions.
> Other users could get vastly different results for any number of reasons.
> I tested a Holux M-2000 and a Royaltec RBT-2110.  I tested both receivers in
> my living room and outside.
> The Holux got average readings of between twenty and thirty feet.  The
> lowest was 20.8 feet.  The highest was thirty feet.
> The Royaltec got readings of between fifty-five feet and ninety-four feet.
> The lowest was fifty-four feet.  The highest was ninety-six feet.
> The Holux averaged eight to ten out of twelve satellites.  The Royaltec
> averaged four out of twelve.
> I know the Royaltec is somewhat better at tracking direction changes.  It is
> a perfectly usable receiver in my experience.  If there is some factor I am
> not taking into account, please let me know.
> Mike Hanson
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