This report summarizes the activities of the Italian INAF VLBI Data Center. Our Data Center is located in Bologna, Italy and belongs to the Institute of Radioastronomy, which is part of the National Institute of Astrophysics

Negusini, M.

Sarti, P.

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Italy INAF Data Center Istituto di Radioastronomia–Bologna
Italy INAF Data Center Report
M. Negusini, P. Sarti
Abstract
This report summarizes the activities of the Italian INAF VLBI Data Center. Our Data Center is
located in Bologna, Italy and belongs to the Institute of Radioastronomy, which is part of the National
Institute of Astrophysics.
1. Introduction
The main analysis activity and storage is concentrated in Bologna, where we store and analyze
single databases, using CALC/SOLVE software.
The IRA started to store geodetic VLBI databases in 1989, but the databases archived in
Bologna mostly contain data including European antennas from 1987 onward. In particular, most
of the databases available here have VLBI data with at least three European stations. However
we also store all the databases with the Ny-A˚lesund antenna observations. In 2002, we decided to
store the complete set of databases available on the IVS data centers, although we limited the time
span to the observations performed from 1999 onwards. All the databases have been processed
and saved with the best selection of parameters for the final arc solutions. In order to perform
global solutions, we have computed and stored the superfiles for all the databases.
In some cases we have introduced GPS-derived wet delays into the European databases (1998
and 1999 EUROPE experiments, for the time being), as if they were produced by a WVR. These
databases are available and stored with a different code from the original databases. In order to
produce these databases, we have modified DBCAL, and this new version is available to external
users.
2. Computer Availability and Routing Access
To date, the main computer is a Linux workstation, on which Mark 5 Calc/Solve version 10
was installed and to which all VLBI data analysis was migrated. The Internet address of this
computer is sarip.ira.inaf.it. Since 2011 a new server with a storage capacity of 5 TB has been
available, and, therefore, all experiments performed in the previous years were downloaded and
archived, thus completing the catalog. The older experiments will be analyzed in order to perform
global long term analysis. At present, the databases are stored in the following directories:
1 = /data2/dbase2
2 = /geo1/dbase1
3 = /geo1/dbase
4 = /geo1/dbase3
The superfiles are stored in:
/data1/super1
The list of superfiles is stored in the file /data2/mk5/save files/SUPCAT. The username for
accessing the databases is geo. The password may be requested by sending an e-mail to
negusini@ira.inaf.it.
226 IVS 2012 Annual Report
https://ntrs.nasa.gov/search.jsp?R=20150003894 2019-08-31T11:13:26+00:00Z


Italy INAF Data Center Report

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