Prepare ATCS For Flat Fields Procedure

Overview

This procedure prepares the telescope and dome to take flat fields, pointing the telescope to the dome flat screen.

Note

Only run the: auxtel/prepare_for/flats.py script if you have sufficient time to vent the telescope afterwards. It will leave the telescope and dome in position to start taking afternoon calibrations. This is telescope az = 205.7 deg. el = 39. deg. dome az = 20.0 deg.

Prerequisites

Be sure you have run previously the following procedure in the daytime checkout in ATQueue-love:

../../../_images/love-mtqueue-atqueue-panel.png

LOVE interface with the “ATQueue” panel.

../../../_images/love-available-scripts.png

LOVE interface with the AVAILABLE SCRIPTS list.

Post-Condition

Telescope is ready to take calibrations.

NOTE: make sure M3 is pointing to LATISS on nasmyth 2, mirror cover are is opened and the telescope is in position, as a final check.

Procedure Steps

Using the LOVE AT QUEUE, run the standard script auxtel/prepare_for/flat.py

No configuration is needed.

../../../_images/love_prepare_for_flat.png

LOVE interface with the auxtel/prepare_for/flat.py script.

This script performs:

  • Turn off ATAOS correction.

  • Put mirror back on the hard points.

  • Shut off the valves so we can test the pneumatics.

  • Open mirror covers and vents. Telescope moves to EL 70 deg. before opening the cover.

  • Put ATDomeTrajectory in disabled to prevent it from synchronizing with the telescope motion.

  • Telescope to flat-field position.

  • Dome to flat-field position.

  • ATDome trajectory in enabled state.

Make sure M3 is pointing to LATISS on nasmyth 2, mirror cover are is opened and the telescope is in position, as a final check.

  • Telescope azimuth flat position = 188.7 deg.

  • Telescope elevation flat position = 39.0 deg.

  • Dome azimuth flat position = 3.0 deg.

../../../_images/love-dome-mount.png

LOVE interface showing telescope and dome position for flats.

Contact Personnel

This procedure was last modified on Nov 14, 2023.

This procedure was written by TDB. The following are contributors: none.