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When the index file is loaded, its index content is duplicated in memory for all the entries. These elements are described in the Table 1.




Table 1: Memory index elements coming directly from the index file.
Parameter Unit Comment
bloc records Entry position in index file
word words Entry position its this record
version -- Entry version
telescope code Telescope code
projid -- Project id
source -- Source name
dobs gag_date Observation date
ut rad Observation time
lst sec Local Sideral Time
az rad Azimuth
el rad Elevation
frontend -- Receiver names
scan -- Scan number
backend code Backend code
obstype code Observation type
switchmode code Switching mode
filstatus code Can read file or not?
calstatus code Calibration status
filename -- IMB-FITS file (no path)
itime nanosec Last indexing time (from 01-jan-1970)




Table 2: Memory-only index elements associated to each entry
Parameter Unit Comment
num -- Observation number
mnum -- Entry position in the Input indeX (IX)
fnum -- Entry position in the index file
idir code Associated index file and IMB-FITS directory
sort -- Sorting array

However, these elements alone are not enough to deal with each IMB-FITS file referenced in the index. Extra numbers are associated on-the-fly, at load time. The Table 2 summarizes those numbers. In details, here is the exact meaning of those numbers:


next up previous contents
Next: Scan date vs observation Up: Memory index Previous: Strategy   Contents
Gildas manager 2014-07-01