Subject: [IGS-ACS-316] test s/w for higher-order iono corrections (fwd)
From: "Jim.Ray" <jim.ray@noaa.gov>
Date: Thu, 04 Mar 2010 09:21:34 -0500
To: igs-acs@igscb.jpl.nasa.gov
CC: Manuel Hernandez Pajares <manuel@ma4.upc.edu>,
    Manuel Hernandez Pajares <mhpajares@gmail.com>,
    Haroldo Marques <haroldoh2o@gmail.com>, p.defraigne@oma.be,
    Miguel Juan-Zornoza <miguel@fa.upc.edu>, Jaume Sanz <jaume@mat.upc.edu>,
    Elizabeth Petrie <elizabeth.petrie@newcastle.ac.uk>,
    Andrzej Krankowski <kand@uwm.edu.pl>, Steve.Hilla@noaa.gov,
    galera@fct.unesp.br, Marcio Aquino <Marcio.Aquino@nottingham.ac.uk>,
    Lutz Simon <simon.lutz@aiub.unibe.ch>, rorus@ma4.upc.edu,
    Manuel Hernandez-Pajares <manuel@mat.upc.edu>, gpetit@bipm.org

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IGS-ACS Mail      04 Mar 06:22:00 PST 2010      Message Number 316
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Dear ACs,

Please see the information below from Manuel Hernandez
Pajares about a new *test* s/w package to compute the
2nd order iono correction.  This follows the development
described in the updated Chapter 9 of the IERS Conventions.
I urge all ACs to test and evaluate this package and
please report any problems or apparent bugs.

For the time being, I recommend *against* actual
operational adoption until it is clear that there are
no outstanding issues.  It would be best to try to
coordinate the IGS adoption of such a model later this
year in order to quantify its effects on IGS products.

I would very much like to thank Manuel and the ad hoc
group (cc list) that he assembled to put together and
test this package.  It has been a remarkably successful
demonstration of collaboration and cooperation!

With regards and thanks,
--Jim


-------- Original Message --------
Subject: Re: Higher-oder iono corrections: New software update
Date: Thu, 04 Mar 2010 09:09:03 +0100 (CET)
From: Manuel Hernandez Pajares <manuel@ma4.upc.edu>
To: Jim.Ray <jim.ray@noaa.gov>
CC: Manuel Hernandez-Pajares <mhpajares@gmail.com>

Hi Jim,

I have not received new inputs so please go ahead with the
last I2 subroutine release for AC testing:

http://gage14.upc.es/MANUEL/.I2/i2_soft_update_v1d.20100218.tgz

Just a few general remarks:

- It is a completely new software done from scratch, evolved
with the contributions of an informal working group of
voluntaring people, so it still can contain bugs.

- Only the second order ionospheric correction is incorporated
by the time being.  It is the more important, and there is a
clear consensus of how to apply it (additional higher
ionospheric order terms and effects could be incorporated
in future after more discussion).

- The programming has been done priorizing the general
applicability among the numerical/memory efficiency.

In spite I will be very committed in several points before
the next IGS meeting (exams for a new position, local
organization of an Intl. meeting, new project and extra
teaching) I will do my best to try provide some feedback
if needed.

Thank you again for your encouragement and continued support
to IGS ionospheric activities,

Manuel


=======================================
Dr. Manuel Hernandez-Pajares,  gAGE/UPC
manuel@mat.upc.es    http://www.gage.es
Mod. C3, Desp. 209 Campus Nord UPC
Jordi Girona 1, 08034-Barcelona (Spain)
Tel/Fax: 34+93 401 6029 / 5981
Skype: manuel_hp
=======================================