en:ost:telescope:setup

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en:ost:telescope:setup [2021/05/29 18:44] – [Creating a pointing model] rhainichen:ost:telescope:setup [2024/07/11 07:45] (current) – [Refining the alignment] rhainich
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 ====== Telescope setup and maintenance ====== ====== Telescope setup and maintenance ======
    
-===== Setup of the mount =====+===== Setup of the GM4000 HPS II mount =====
  
-==== Using the mount directly ====+==== Using the mount directly via the handheld terminal ====
 === Alignment === === Alignment ===
  
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     * to improve the accuracy all stars should be spread across the whole sky     * to improve the accuracy all stars should be spread across the whole sky
  
-There are further methods to change/improve the alignment that are documented in the manual of the GM 4000 QCI, which can be found in room 2.009.+There are further methods to change/improve the alignment that are documented in the manual of the GM 4000 HPS II, which can be found in room 2.009.
  
  
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 The Periodic Error Correction (PEC) can help to improve the tracking accuracy of the mounting by accounting for periodic errors of the worm gear. This error usually has a period of approx. 3 min 20 sec (3.3 minutes), while the PEC can correct for shorter periods, too. The error of the worm gear is usually irrelevant as long as the observations are only carried out with an eyepiece -- in case longer observations are taken with CCDs, the corrections of this error are getting important. The Periodic Error Correction (PEC) can help to improve the tracking accuracy of the mounting by accounting for periodic errors of the worm gear. This error usually has a period of approx. 3 min 20 sec (3.3 minutes), while the PEC can correct for shorter periods, too. The error of the worm gear is usually irrelevant as long as the observations are only carried out with an eyepiece -- in case longer observations are taken with CCDs, the corrections of this error are getting important.
  
-The PEC has to be calibrated before it can operate properly. For this purpose, the mount needs detailed information on the deviations from the ideal tracking behavior. One possibility to achieve this is by centering a bright star in an eyepiece and following its motions with the hand terminal (the N - S - E - W buttons) for a while. A more sophisticated option is based on the [[en:ost:ccds:ccdops#Guiding|autoguide functionality]] of our CCD cameras, as the precision is higher this way. Start the PEC calibration on the hand terminal with:+The PEC has to be calibrated before it can operate properly. For this purpose, the mount needs detailed information on the deviations from the ideal tracking behavior. One possibility to achieve this is by centering a bright star in an eyepiece and following its motions with the hand terminal (the N - S - E - W buttons) for a while. A more sophisticated option is based on the [[en:ost:ccds:ccdops#Guiding|autoguide functionality]] of our CCD cameras, as the precision is higher this way. It is recommended to train the PEC directly via the handheld terminal. The training algorithm of the PEC is started by means of:
  
 <code>Drive -> A-PEC control -> A-PEC Training</code> <code>Drive -> A-PEC control -> A-PEC Training</code>
  • en/ost/telescope/setup.1622313856.txt.gz
  • Last modified: 2021/05/29 18:44
  • by rhainich