[IGSSTATION-6305] Fwd: OPMT: change of reference clock.

[Pierre Uhrich]

Dear Colleagues,

When considering that this information was not forwarded to the IGS mailing list, I assume there is an issue somewhere. I have scanned again the joined log file, but have not seen what was possibly wrong with it. Thank you to let me know what we have to do in addition to that so that the information and the new log file be distributed to IGS network.

Best regards.
P. Uhrich

Début du message réexpédié :

> De : Pierre Uhrich <Pierre.Uhrich at obspm.fr>
> Objet : OPMT: change of reference clock.
> Date : 27 août 2015 15:37:42 UTC+02:00
> À : "igsstation at igscb.jpl.nasa.gov" <igsstation at igscb.jpl.nasa.gov>
> Cc: rnt lne <rnt.lne-syrte at obspm.fr>
> CCi: Pierre Uhrich <Pierre.Uhrich at obspm.fr>
> 
> Author: Pierre Uhrich (LNE-SYRTE, Observatoire de Paris)
> 
> Dear Colleagues,
> 
> We have carried out a change of external clock for the IGS station OPMT on DOY 238, MJD 57260, Wednesday August 26, 2015.
> The reference clock is from now on directly UTC(OP), the real time prediction of UTC produced in Observatoire de Paris (OP).
> The change occurred between 16:00 and 17:20 UTC. We advise potential users that OPMT data files might be corrupted for DOY 238.
> 
> UTC(OP) is currently generated in an independent way from an H-maser ensemble steered on the LNE-SYRTE Primary and Secondary Frequency Standards, which are a Cesium fountain FO1, a Cesium/Rubidium fountain FO2 and a mobile fountain FOM. When required, an additional frequency steering is achieved monthly after BIPM Circular T is released, depending on the offset between UTC and UTC(OP). During the last twelve months, the departure of UTC(OP) from UTC did not exceed 3.4 ns.
> 
> A new log file for OPMT is joined below.
> 
> Please feel free to contact us in the case more detailed information would be needed.
> Best regards.
> Pierre Uhrich.
> 
> 
> 
> 
> Pierre Uhrich
> 
> Ingénieur-Chercheur LNE		Pierre.Uhrich at obspm.fr
> 
> LNE-SYRTE	
> Observatoire de Paris	
> 61 avenue de l'Observatoire
> 75014 Paris
> France
> 
> Tél.: + 33 (0)1 4051 2217
> Fax.: + 33 (0)1 4325 5542
> 
> 

Pierre Uhrich

Ingénieur-Chercheur LNE		Pierre.Uhrich at obspm.fr

LNE-SYRTE	
Observatoire de Paris	
61 avenue de l'Observatoire
75014 Paris
France

Tél.: + 33 (0)1 4051 2217
Fax.: + 33 (0)1 4325 5542


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