[time-nuts] NIST time services

[Paul]

On Mon, Mar 24, 2014 at 4:26 AM, Poul-Henning Kamp <phk at phk.freebsd.dk>wrote:

> In message <CABbxVHuQc0144==21mDa_R8ErKov=
> EM+9rVRbPggeXNZZTjnAg at mail.gmail.com>
> , Chris Albertson writes:
>
> >Yes.  NTP calls it "root distance" [...]
>
> And it is generally useless, because people don't calibrate it.
>

How do you calibrate root distance assuming that it's "one-half the
roundtrip root delay plus the root dispersion plus minor error
contributions not considered here"?