[Loadstone] Observations on Accuracy with Two Receivers

Len Burns len at gatamundo.com
Mon Oct 22 21:39:00 BST 2007

Hi Mike,

This is indeed interesting.  One question, when outside, did you test
in a stationery position or were you moving?  I am also interested in
something else if you were moving.  This morning I was monitoring my
speed.  I was out on the levy, and was moving steadily in a quite open
area along the river.  I was noticing my heading varying plus or minus
about 10 degrees, and my speed jumping all over the place from 1 mph
to around 6.  The truth was likely around 4.  This was the royaltech
2110.  The accuracy I was seeing most of the time around 29 feet.  In
fairness I had just come from my run, and I was carrying the receiver
in the pocket of my running shorts.  This means that it was swinging
pretty freely which may impact all of the above.

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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> Loadstone at loadstone-gps.com
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and leave a trail."
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