Tools for Automated Observing
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  System requirements
Getting Started
  Modeling slew times
  Measuring camera
  download times
  Specifying filter
  names and numbers
  Modeling the local
  Creating user profiles
  Initializing target
  Customizing the
Daily Operation
  Starting observatory
  control software
  Updating target
  Generating a list of
  potential targets
  Preparing a list of
  observation requests
  Running the
  Starting scheduled
Image Acquisition with
the MU Script
  Customizing the
  File locations and
  telescope name
  Station data
  Basic parameters
  which determine
  script behavior
  Dome parameters
  Filter parameters
  Safe telescope
  Image compression
  CCD camera
  Telescope slewing
  Telescope slew
  Pointing corrections
  Timing tolerance/
  waiting times
  Bias frame
  Dark frame
  Flat field
  Image shifts for
  binned calibration
  Weather station
  Focus parameters
    Page 1
    Page 2
  Aiming exposure
  Starting MU
  Sequence of events
  during an observing
  run using MU
Timing Refinement
  Collecting timing
  Analyzing timing
  Adjusting the
  empirical timing
Other Tools
  Slew time
  measurement script
  Minor Planet Checker
  query script
  Regression program
  Software updates
  License agreement
  Contact the author
Image acquisition with the MU script

Customizing the MU script (continued)

CCD camera parameters

dayCameraTemp = 0.                    ' Camera setpoint temperature (deg C) in daytime
nightCameraTemp = -20.                ' Camera setpoint temperature (deg C) in nighttime
CameraCoolingTime = 20.               ' Time (min) required by the camera to cool down from the 
                                      ' daytime setpoint to the nighttime setpoint; cooling will
                                      ' start this amount of time before sunset
waitForSetpoint = True                ' True to wait until nighttime setpoint temperature is
                                      ' reached within tolerance specified by setpointTol
setpointTol = 1.5                     ' Tolerance (deg C) for checking that nighttime setpoint 
                                      ' has been reached
dayTempOnCompletion = True            ' True to change CCD setpoint temperature to
                                      ' dayCameraTemp on script completion
unlinkOnCompletion = False            ' True to terminate link to the camera on 
                                      ' script completion

  • dayCameraTemp. Specify the working camera temperature (in degrees Celsius) to be used when the camera is not taking images (usually in daytime).

  • nightCameraTemp. Specify the working camera temperature (in degrees Celsius) to be used when the camera is taking images (usually at night or in twilight).

  • CameraCoolingTime. Specify the approximate time (in minutes) which the camera cooler takes to lower the temperature from dayCameraTemp to nightCameraTemp. The script will start to lower the camera temperature this amount of time before sunset.

  • waitForSetpoint. If you set this parameter to True, the script will only start taking calibration or science images after the camera temperature is within setpointTol degrees Celsius of the nighttime setpoint temperature (nightCameraTemp). While this ensures that all your images are taken at the desired temperature, it may lead to delays in starting the observations if the camera cooling system can't reach the nighttime setpoint fast enough (which may happen if you use a nighttime setpoint which is lower than the cooler may sustain, or if you start the script too late). If you set this parameter to False, the script will start taking images at a suitable time (usually imaging starts with taking bias and dark frames, immediately afer sunset), even though the camera temperature may be far from the nighttime setpoint.

  • setpointTol. Specify a temperature tolerance (in degrees Celsius) with respect to the nighttime setpoint temperature (nightCameraTemp). If waitForSetpoint is set to True, setpointTol is used to check if the nighttime setpoint temperature has been reached. Irrespective of the value of waitForSetpoint, a warning message will be produced if an image is taken when the camera temperature deviates from the nighttime setpoint by more than setpointTol degrees Celsius.

  • dayTempOncompletion. Set this to True to change the setpoint temeprature to its daytime value (dayCameraTemp) at the end of the night's observations, and to False to keep the setpoint at its nighttime value (nightCameraTemp) after the end of the observations.

  • unlinkOnCompletion. Set this to True to terminate the link from the observatory control computer to the CCD camera at the end of the night's observations.

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Next: Telescope slewing parameters

© 1999-2004 Paulo Holvorcem