[IGSSTATION-4098] OPMT: change of reference clock
Pierre.Uhrich at obspm.fr
Fri Oct 29 10:53:37 PDT 2010
Author: Pierre Uhrich (LNE-SYRTE, Observatoire de Paris)
Due to hardware maintenance activities to be conducted on the H-Maser
used as local oscillator for OPMT IGS station, we have performed a
change of reference clock on DOY 300, MJD 55496, Wednesday October 27
2010. The new reference clock is still an H-Maser, but old enough to
exhibit more noise compared to the former one. It is expected that after
a given period of time depending on that maintenance activity we might
go back to the former H-Maser in a few months from here.
We nevertheless advise potential users that OPMT data files might be
corrupted for DOY 300 and 301. In average, OPMT data might exhibit today
a small offset of about 1 ns with respect to the former situation, which
stays consistent with usual delay calibration uncertainties.
A new logfile for OPMT is joined to that email.
Please feel free to contact us in the case more detailed information
would be needed.
Dr Pierre Uhrich Pierre.Uhrich at obspm.fr
Equipe Métrologie du temps
LNE-SYRTE, Phone: + 33 (0)1 40 51 22 17
UMR CNRS 8630, Fax: + 33 (0)1 43 25 55 42
Observatoire de Paris,
61 avenue de l'Observatoire, F-75014 Paris, France.
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