Changing Observation Mode
The insrument has currently four main observation modes: imaging; imaging
polarimetry; spectroscopy; spectropolarimetry, and two sub modes for checking
aligments, obtaining dark frames, and so on. The page below describes how
to change the observation mode of the instrument. Please note that the
details given below are subject to change at any time.
How to Change Observation Mode
To change observation mode, type on demi or on trispec as follows.
% obsmode <mode_name>
The following value are currently available as mode_name.
image - Imaging mode
impol - Imaging polarimerty mode
spec - Spectroscopy mode
specpol - Spectropolarimetry mode
pupil - Pupil imaging mode
dark - Dark mode (the slit wheel will
be closed for obtaining dark frames)
% obsmode specpol
will change the insrument to the spectropolarimetry mode. If you run without
the command shows the current observation mode.
The obsmode command will change the positoins of several wheels
in the instrument for a requested mode, and records a requested mode in
the status file. However, if you manualy insert or desert grisms/wollaston
prisms/lens, the recorded mode might be incorrect. Please note this when
you move wheels by using other commands.
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Last Modification Date: 2001/02/18
Last Modification Author: Makoto