Here "t" stands for a time in seconds, and "n" stands for the number of exposures.
Bias and multiple bias frames
bias take a bias frame and save it, with OBSTYPE defined as BIAS
multbias "n" make multiple exposures, all with OBSTYPE defined as BIAS
Normal exposures (all commands use similar arguments)
arc "t" "name" take and save an exposure, with the OBSTYPE defined as ARC
dark take and save a dark frame, with OBSTYPE defined as DARK
flash take and save an exposure, with the OBSTYPE defined as FLASH
flat take and save an exposure, with the OBSTYPE defined as FLAT
run take and save an exposure, with the OBSTYPE defined as RUN
sky take and save an exposure, with the OBSTYPE defined as SKY
Multiple exposure sequences (all commands use similar arguments)
multarc "n" "t" "name" make multiple exposures, all with OBSTYPE defined as ARC
multdark make multiple exposures, all with OBSTYPE defined as DARK
multflash make multiple exposures, all with OBSTYPE defined as FLASH
multflat make multiple exposures, all with OBSTYPE defined as FLAT
multrun make multiple exposures, all with OBSTYPE defined as RUN
multsky make multiple exposures, all with OBSTYPE defined as SKY
Test exposures
glance "t" take one exposure and leave in the glance file
promote promote the glance file to a normal run
scratch "m" "t" take one exposure and save it to a scratch file numbered "m"
promote "m" promote a scratch file to a normal run
Changing image size
bin "x" "y" select binned readout of the detector
disable_win suspend the effect of windowing on a CCD
enable_win resume windowing after disable_win (q.v.)
window "window number" "xw" "yw" "xoff" "yoff"
define a read-out window on a CCD
Changing CCD speed
clear_speed "type" set the clear speed, to STANDARD to QUICK
nonastro change the readout speed to NONASTRO
quick set the readout speed to QUICK
readout_speed "type" change the read-put speed of the CCD
rspeed "type" synonym of readout_speed
slow change the readout speed to SLOW
standard change the readout speed to STANDARD
turbo change the readout speed to TURBO
Interrupting an exposure (these have to be preceeded by Cntr-Z)
abort abort an observation, discarding and associated data
finish terminate an exposure immediately; saving the data
newtime "t" change the length of an exposure
pause suspend an exposure
resume restart an exposure suspended by pause (q.v.)
Housekeeping
cleanup get rid of system remains after SHUTDOWNOBSSYS
dasreset use this on lpss12 when having FOX problems;
see trouble shooting section. Follow with STARTOBSSYS
on lpss10.
obsdata "directory" "size" define the FITS data directory,
and define approximate FITS file size in Mb
preflash "t" set the length of a CCD preflash
rtc_sync synchronize the real time clock on the CCD controller
setup_ccd "name" prepare CCD channel; part of STARTOBSSYS
shutdownobssys kill the system
shutter "" move or unjam the shutter (arguments: open/close/unjam)
startobssys use to start up or when when a subtask has died