Re: Bug#842934: ITP: casacore-data-predict -- Earth orientation parameter prediction tables for casacore

["Jonathan Quick" <jon@hartrao.ac.za>]

Hi Ole

On Wed, November 2, 2016 2:07 pm, Ole Streicher wrote:
> Package: wnpp
> Severity: wishlist
> Owner: Ole Streicher <olebole@debian.org>
> X-Debbugs-CC: debian-devel@lists.debian.org, debian-astro@lists.debian.org
>
> * Package name    : casacore-data-predict
> * URL             : http://maia.usno.navy.mil/
> * License         : Public domain
>   Description     : Earth orientation parameter prediction tables for
> casacore
>
> The IERS Prediction tables provide predictions for the time-varying
> orientation of the terrestrial reference frame within the quasi-inertial
> celestial reference frame for casacore.
>
> The package will contain the `IERSpredict` and `IERSpredict2000` tables
> for casacore.

These tend to be moving goal posts.  Post-analysis of VLBI sessions (and
related space geodetic techniques) gives measurements of EOPs (which are
unknown functions of time due to myriad torques applied to the earth by wind,
ocean, other bodies, human activities etc.)  The predictions are just that, an
estimate at a point in time of the future evolution of these parameters which
is subsequently obsoleted by the actual measurements.  Hence packaging these
predictions would be of little value, and by their nature, the further into
the future one predicts, the less accurate they become.

Regards
  Jon
>
> The package is a part of the effort taken by Benda Xu and me within the
> Debian Astro team to split up the original "casacore-data" package (RFP
> #761146) by data source into smaller packages which can be maintained
> independently.
>
> The package will be maintained on our git repository under
>
> https://anonscm.debian.org/cgit/debian-astro/packages/casacore-data-predict.git
>
> Best regards
>
> Ole
>
>
>