Subject: Re: IGS polar motion parameterization and smoothing
From: Gerd Gendt 
Date: Tue, 01 Jan 2008 11:17:54 +0100
To: "Jim.Ray" 
CC: ...

Dear Jim,

Thanks for the plots.
I only would like to note that GFZ erp-files also contain some "smoothing".
We are forcing the offsets+rates to be continuous at the day boundaries
(Remi is removing this constraints). There must be some additional software
differences between CODE and GFZ (orbits are also 3d arcs in both cases).

Happy new  year, to all of you

Gerd

PS. You can get the missing erp-data from the ACC line (in final/pole the
collected data; and in final/orbit the submissions).
SIO is had not submitted the missing week!

Subject: Re: IGS polar motion parameterization and smoothing
From: Gerd Gendt 
Date: Thu, 03 Jan 2008 16:01:43 +0100
To: "Jim.Ray" 
CC: Gerd Gendt 

Dear Jim,

you latest plots for the discontinuities are very interesting, its
astonishing
what the ACs have done so far.
GFZ is setting some constraints, otherwise our discontinuities would
even larger,
I guess, but the constraints, are not too tied. They should only avoid
rather strange
behavior in case of not so good data and networks (which is nowadays not
the case
anymore).

Best regards
Gerd