[ntp:questions] frequency adjusting only

Ulrich Windl Ulrich.Windl at RZ.Uni-Regensburg.DE
Wed Jul 9 13:56:58 UTC 2008

"David L. Mills" <mills at udel.edu> writes:

> Evandro,
> We didn't account for gravity and time dilation, as the errors in the
> extrapolated ephemeris data dominated the error budget. I am told accurate
> spacecraft navigation needs time to the nanosecond. In principle, the

Wow! Spacecraft steering with nanosecond accuracy! Or did they talk about
longtime stability as in the past for long (sea) ship journeys?

Just wondering,

> Proximity-I protocol and NTP onwire protocol can do that, I don't think the
> transceiver clocks and onboard rover clocks are anywhere near that caliber.

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