[time-nuts] Computing GPS Distance Error in Time

[Tim Shoppa]

Rule of thumb: every meter off in survey altitude is three nanoseconds.

The error due to inaccurate latitude/longitude is much smaller in
nanoseconds per meter for any reasonable viewable sky.

Tim N3QE

On Sun, Nov 3, 2013 at 10:51 PM, Bob Stewart <bob at evoria.net> wrote:

> I'm experimenting with an Adafruit receiver (MTK3339) and I'd like to be
> able to compute the time error delta between each reported position.  I can
> guess it's a vector difference between each two successive points converted
> to ns, but beyond that, I don't know what to do.  IOW, I need to know the
> time error as the thing reports it's wandering around the block.  Is the
> error only related to east and west movement, or does the north/south
> component play a role, too?
>
> Bob - AE6RV
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