Dear Axel,

I personally don't think that the ECC file has something to do with
discontinuities. ECCDAT.ecc contains ecc values for Mobile
Occupations maily, since all fixed antennas have zero values
(with some exception, see also below).

The only useful information you have regarding discontinuities are
the epochs contained in the file esm2005a.dat, where for example
Earthquake epochs are given, e.g. Denaly EQ in Fairbanks, etc.
However I still do not know what is the nature of the "events" in
Medicina and EFLSBERG. To fill in the discontinuity SINEX
block, we do not need to know the offsets, since these are
estimated in the combination and stacking of the time series.

On the other hand, I noticed that in the ECC file, you have some
none zero values for fixed antennas, after rail repairs. Normally
this kind of "displacement" changes the location of the antenna
physical point in space and therefore a new DOMES number should
have been assigned. I already mentioned this many times to IVS
colleagues, but I have never been informed about these cases.

Regards
Zuheir


Axel Nothnagel wrote :

> Dear Jim, dear colleagues,
> Thank you for volunteering to do our homework.
> I have access to two files containing pertinent information to discontinuities 
> of VLBI sites. They belong to the Solve software. I distribute these assuming 
> that the GSFC colleagues do not object. Other groups may have additional 
> information.
> 
> ECCDAT.ecc 
> keeping all the offsets known by epoch and magnitude 
> 
> esm2005a
> keeping epochs of discontinuities without values for the offsets
> 
> Medicina, DSS65 and EFLSBERG have measured offsets but they never made it into 
> the ECCDAT.ecc file for whatever reason.
> I have to dig them out and will send them later.
> 
> Best regards, Axel

-- 
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Zuheir Altamimi                           Email : altamimi@ensg.ign.fr
Institut Geographique National            Phone : 33 1 64 15 32 55
ENSG/LAREG                                FAX   : 33 1 64 15 32 53
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