Sujet : Re: The old definition of second is winning against SI idiocy
De : jp (at) *nospam* python.invalid (Python)
Groupes : sci.physics.relativityDate : 28. Jun 2025, 22:34:00
Autres entêtes
Organisation : Nemoweb
Message-ID : <g6va57pHymBZXf8nZsA8UPrSXe4@jntp>
References : 1 2 3
User-Agent : Nemo/1.0
Le 28/06/2025 à 23:29, Maciej Woźniak a écrit :
On 6/28/2025 9:22 PM, Paul B. Andersen wrote:
> Den 27.06.2025 10:34, skrev Maciej Woźniak:
>> On 4/10/2025 10:41 PM, Paul.B.Andersen wrote:
>>
>> > GPS clocks are adjusted down by (1 - 4.4647e-10)
>> > so the adjusted clock will measure a mean solar day
>> > to last 86400 s, and the clock will stay in sync with UTC.
>>
>> That's right - the clocks made for serious measurements
>> are adjusted (calibrated) to count seconds of 1/86400
>> of a mean solar day.
>
> Quite right.
> The GPS-SV clocks are indeed made for serious measurements.
> And the designers of the GPS understood that they
> had to adjust the clocks down by ((1 - 4.4647e-10) \
> The Galileo-SV clocks are also made for serious measurements.
> And the designers of the Galileo GNSS understood that they
> had to adjust the clocks down by ((1 - 4.7218e-10) to
> make the SV-clock stay in sync with UTC and would have
> measured 86400 seconds in a mean solar day.
>
> The GLONASS-SV clocks are also made for serious measurements.
> And the designers of GLONASS understood that they
> had to adjust the clocks down by ((1 - 4.3582e-10) to
> make the SV-clock stay in sync with UTC and would have
> measured 86400 seconds in a mean solar day.
Summarizing - for serious measurement
we have to rely on the old second
instead that mad nonsense your bunch of
idiots is insisting on.
QED.
BTW, you really should learn some basics.
UTC, TAI, GPS time - they're similar but
slightly different (and, of course, none
of them dilates).
Why did you snipped this ? Cannot answer ?
‹ You know of course why the SV-clocks made for serious measurements
in the different GNSS systems have to be adjusted differently.
Or don't you? ›