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Archiving spectral line data at AO
03MAR03
Data organization: Records,Scans,Files,Directories,
Archive Tables.
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The raw data is stored on disc ( 290 gigabytes of spectra
jan2001->mar2003 ).
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RECORDS contain a header followed by data.
Typically one second records are written to disc.
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Records are grouped into SCANS.
A scan can be an: on Position, off Position, strip
of a map, etc..
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A FILE contains the scans written at one session
on the telescope.
The file naming convention contains the date and the
project ID
corfile.23feb03.a1412.1
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Files are stored in disc directories by project name.
/proj/a1412/corfile....
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There are two types of ARCHIVE TABLES.
File Table: filename,
location, size, ptrs into scan table.
Scan Table: Scan information. One
entry per scan
Each table is stored by month as IDL save files.
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