The blue metallic box below the acquisition/guider box contains the filter wheel(s), labelled on the East and West sides. Each wheel has 8 filter positions; position 1 is the reference and position 8 is always empty, so that with two wheels installed, one wheel should always have position 8 in the beam (unless one wheel contains neutral density filters). '''Filters must not be removed from the filter wheels.'''
Throughout 20222023, the filters in the 1-m wheels will be as follows:
{| class="wikitable" border="1"
* Remarks: Any applicable notes, e.g. the RA & Dec zeropoints for the specific coordinates used.
== Current known issues Troubleshooting ==
'''Telescope pointing The table below describes some problems/time server error'''you might encounter. Some can be tackled by the observer (see column 4). If the suggested steps to be followed by an observer fail, please call a technician.
If you encounter telescope pointing problems{| class="wikitable" border="1"|-! Symptom! Cause! Solution! Who to call|-| The TCS GUI disappears/won't open| The 40inch_lodestar_source_extract service needs to be running on ioserver1.| Check if the process is running, if it is reported as "inactive (dead)" then restart it and check again: ssh io@ioserver1.suth <br>systemctl status 40inch_lodestar_source_extract <br>systemctl start 40inch_lodestar_source_extract <br>systemctl status 40inch_lodestar_source_extract| IT or electronics standby.|-| Telescope pointing problems| There may be a time server error.| Check the time and date displayed on the TCS. If it is incorrect, as phone for assistance.| Electronics standby.|-| Dome Shutter obscuring the cause could be telescope| The dome does not find its position, and therefore does not follow the time servertelescope correctly. If | Point the date/time is wrongtelescope to zenith (with dome in auto), please call or rotate the electronics technician for assistancedome so that it can establish its position by passing through some of the cardinal points.| Observer|}
==Webcam==
