Brian Inglis wrote:
> Martin Burnicki wrote:
>> At the single nanosecond accuracy level it would also be
>> important to *which* local realizations UTC(k) you are referring,
>> UTC(NIST), UTC(USNO), UTC(PTB), ...
>
> The source would need to provided by or calibrated against the ref,
>> at some cost!
> Unless at that level you just call it UTC(GPS), UTC(LCL), or UTC(MB)!
Since you can get a e.g. Trimble
NTP Server GNSS GPS with 440 channels
GPS, Simultaneous L1 C/A, L2E, L2C, L5
Galileo, Simultaneous L1 BOC, E5A, E5B, E5AltBOC2
GLONASS, Simultaneous L1 C/A, L1 P, L2 C/A , L2 P, L3 CDMA
BeiDou, B1, B2
SBAS, Simultaneous L1 C/A, L5
QZSS, L1 C/A, L1 SAIF, L2C, L5, LEX
WAAS
EGNOS
MSAS
GAGAN,
SDCM,
OmniSTAR, L-Band VBS/XP/G2/HP
RTX, (Trimble WWC)
...
Which have four different UTC base sources,
the units must already do something to combine the results,
to approximate {calculate} UTC(TAI)?.
--
E-Mail Sent to this address <[email protected]>
will be added to the BlackLists.
_______________________________________________
questions mailing list
[email protected]
http://lists.ntp.org/listinfo/questions
