[time-nuts] Cable length calibration

[Tim Shoppa]

We are all time nuts, so there's an obvious answer: What you do, is raise
the GPS up to a height the same as the cable length. You then drop it,
measure the time until it hits the ground, and use d = 0.5 a * t * t to
calculate d. Then you correct for the velocity factor.

Tim N3QE

On Wed, Jun 29, 2016 at 3:28 PM, Hal Murray <hmurray at megapathdsl.net> wrote:

>
> brooke at pacific.net said:
> > At one point they were looking into making a GPS time receiver where the
> > cable length calibration would be built-in.
>
> How would you do that?
>
> The obvious way is to compare the time you get with a known-good time, but
> if
> you had that, why would you want this new GPS with an unknown cable length.
>
> You might be able to do it by measuring the DC drop.  Getting enough
> accuracy
> seems tough.
>
>
> --
> These are my opinions.  I hate spam.
>
>
>
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