[time-nuts] ISS NTP operation problems.

[Magnus Danielson]

Hi,

On 2021-01-08 09:24, Poul-Henning Kamp wrote:
> --------
> Steven Sommars writes:
>
>> There is a ~600-700 msec RTT between the ground NTP servers and the ISS NTP server.
> How stable is that ?
>
> Is there a lot of sample-to-sample jitter ?
>
> Have they clamped the poll-rate on the S2 ?
>
Another aspect, how much have delay shifted with how ISS moves around,
and how well the packets match each other and (about) same delay of
transmission. There is a certain assumption about stability of link, but
a systematic modulation of link delay could potentially eat into causing
mismatches that for sure would upset things.

Cheers,
Magnus