LEDAS 
Leicester Database and Archive Service
What's New
Contact Details
Getting Help
Overview
LEDAS
    User Guide
NAM Poster 2004
LEDAS Personnel
Other Database
    Sites
Local Links
Acknowledge
    LEDAS
Line
Footer
E-mail
Downtime expected shortly as all LEDAS services are moved to a new server.
next up previous contents
Next: Calibration files Up: The ROSAT Data Archive Previous: Analysis software: ASTERIX

Processing status of the archive data

The standard analysis software system (SASS) is used to process the raw telemetry from the satellite into a format that users can work with (using ASTERIX). In January 1994 a new version of the SASS was introduced. From this date all new data entering the archive was processed to this standard, known as ``REV2". In addition, a programme of reprocessing of the old REV0 and REV1 datasets (ie. those originally processed before Jan. 1994) was undertaken. This procedure is now almost complete; only 3% of the archive remains to be converted into REV2 format. This should not be a major issue for most users; the ASTERIX system uses interface routines which convert each type of dataset into the standard HDS formats. The precise details of the construction and contents of each set of files downloaded from the archive are therefore of minor importance. The existence of REV0/1 data in the archive is mentioned here only for completeness.



 
HOME
SEARCH
SERVICES INFO SOFTWARE ViZieR BLASTA DSS
ARCHIVES ASCA CHANDRA GINGA ROSAT ARNIE