Figure: bcs_24hr_plot, '11-dec-91'
If you do not know exactly which period you are interested, you can
get an idea of what the BCS has seen either by producing light curves using
BCS_24HR_PLOT, using WBDA to examine files, or by producing a
grey-scale image of spectra against time within a selected file
using GS. Fig. 2 shows a sample output for
the routine BCS_24HR_PLOT.
0.1 in
If you interested only in whether the BCS has seen anything, this
can be determined using BCS_24HR_PLOT. This routine works using
either the BDA roadmaps or the Observing Log (OBD files in the case of
the BCS) and allows plots of a selected day to be made. The start of
each (per-orbit) BDA file is marked, as are the times of SAAs and
nights. By default, the observing log is used and channel 3 (Ca XIX)
is selected. Note: YODAT does NOT need to have been run before
BCS_24HR_PLOT.
IDL> bcs_24hr_plot,'dd-mmm-yy' [,chan=n]
IDL> bcs_24hr_plot,'dd-mmm-yy',/bda [,chan=n]
The widget-driven interface WBDA allows the user to examine any BDA
file on the data directories. This routine allows the user to interactive
work with the data, plotting the light curve and also plotting spectra
for selected times with the data.
IDL> wbda
If you are interested in more detail of what spectra the BCS has
observed, use GS - this routine must be run after the data has been read in
with YODAT. There is a limit of how much data can be handled at a time
(about 900 spectra), and some selection of the required time interval may be
needed using the methods described above, but for the per-orbit files, this
limit may not be a problem. The advantage of GS is that you can get a good
idea of what has been seen in the spectra - a particularly useful tool if
you are trawling for data. Remember, all the routines that run from GS
(those that have names starting with GS_) require that a time-period be selected
first using the cursor routine, GS_CUR.
IDL> .run gs
IDL> .run gs_cur
Warning: If there is a gap in the time coverage in a data file,
the time axis on the GS greyscale plot may not be uniform!!