[time-nuts] Sure Electronics GPS

Kiwi Geoff geoff36 at gmail.com
Mon Jan 17 08:46:09 UTC 2011

Rix Seacord wrote:
> The SureElectronics unit is general within 10 feet with no observed off the
> wall excursions.

One possibility Rix, perhaps it may be like the Garmin 18x which has a
very stable position with no sudden excursions ( with its Average Mode
ON ).

The 18x gives position in discrete 13 cm steps (quanta) of longitude,
that change very slowly (if the GPS is stationary).

However when the 18x is averaged long term, it has the same ability to
predict position as a standard GPS receiver whose output is averaged
long term.

So "maybe", what you are seeing, is a heavy filtering algorithm in action.

Regards, Geoff.

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