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| en:ost:telescope:setup [2021/05/29 18:44] – [Creating a pointing model] rhainich | en:ost:telescope:setup [2021/05/29 19:59] (current) – [Via the handheld terminal] rhainich | ||
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| ====== Telescope setup and maintenance ====== | ====== Telescope setup and maintenance ====== | ||
| - | ===== Setup of the mount ===== | + | ===== Setup of the GM4000 QCI mount ===== |
| - | ==== Using the mount directly ==== | + | ==== Using the mount directly |
| === Alignment === | === Alignment === | ||
| Line 123: | Line 123: | ||
| 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: | + | 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: |
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