The International DORIS Service July 2003 – December 2005 report

IDS Report – July 2003 to December 2005 10
4 THE CENTRAL BUREAU: IDS INFORMATION SYSTEM
Laurent Soudarin (1)
(1) CLS, France
Within the IDS, the information is provided through the web and ftp sites of the Central Bureau,
the Data Centers and the Analysis Coordination, depending on the kind of information. Day-to-
day news of general interest are given to the DORIS community by the DORIS mail service. The
DORIS report and the IDS Analysis Forum mailing lists are devoted to the Analysts. This report
gives an overview of the IDS information system.
4.1 WHAT AND WHERE
IDS has three data/information centers:
• CB: the Central Bureau web and ftp sites at CLS
• DC: the Data Center(s): * CDDIS: web and ftp sites * IGN: ftp site
• AC: the Analysis Coordinator webpage at IGN/LAREG
The baseline storage rules are as follows:
DC store observational data and products + formats and analysis descriptions. The DCs will
issue monthly bulletins (with respective dates shifted by 1/2 month) giving the current status of
the data and product storage. .
CB produces/stores/maintains basic information on the DORIS system, including various
standard models (satellites, receivers, signal, reference frames, etc). .
AC refers to CB and DC information on the data and modelling, and generates/stores analyses
of the products.
Two criteria are considered for deciding where files are stored/maintained:
1. the responsibility on their content and updating,
2. the easiness of user access.
Data-directed software is stored and maintained at the CB, analysis-directed software is
stored/maintained, or made accessible through the AC site.
To avoid information inconsistencies, duplication is minimized. Logical links and cross
referencing between the three types of information centers is systematically used.