Shutdown

Overview

At the end of the night, ATTCS and LATISS CSCs should be set to STANDBY. Telescope and dome should be parked. The parking position for AuxTel is El = 80 deg, Az = 0.0 deg, rot = 0.0 deg. For the dome, the parking position is at Az = 285.0 deg with closed dome slit shutter.

Precondition

Stopping Scheduler

The Scheduler automatically adds new targets to the queue until the start of nautical morning twilight. If there are no targets, the Scheduler will stop adding new ones. If you need to stop the Scheduler manually, you can use the auxtel/scheduler/stop.py script from ATScriptQueue without any additional configuration.

See more detailed descriptions on stopping the scheduler.

Post-Condition

  • Status of Telescope and Dome

  • Status of Mirrors and Mirror Covers

  • Status of CSC components of ATTCS and LATISS

    ../../../_images/CSC.png

Procedure Steps

Shutdown AuxTel

After stopping scheduler, you can shutdown AuxTel using auxtel/shutdown.py script from ATQueue. without any configurations as below.

../../../_images/shutdown_script.png

This script performs the following steps:

  1. Closing the M1 cover: First, it disables ATAOS corrections. Then, it closes the M1 cover and vent gates. If mirror is opened, auxtel/shutdown.py script will not able to close the dome slit.

  2. Closing the Dome Shutter: It closes the dome shutter if it is opened. If the dropout door is open, you can close manually via button at the AuxTel or with auxtel/atdome/close_dropout_door.py script without configuration.

  3. Parking the Dome: The parking position is Az = 285.0 deg. Then, the dome following is disabled after parking.

  4. Parking the Telescope: The parking position is El = 80 deg, Az = 0.0 deg, rot = 0.0 deg for AuxTel telescope. Tracking will be stopped.

  5. Putting ATTCS CSCs in STANDBY: The AT CSC components ATMCS, ATPtg, ATDome, ATDomeTrajectory, ATAOS, ATPneumatics, ATHexapod will transition to STANDBY.

    After parking and shutdown for Auxillary Telescope are completed, you can check the status of dome and telescope on LOVE.

  6. Send LATISS to STANDBY: After parking the AuxTel and taking daytime calibration, the LATISS CSCs are still in ENABLED state. Run auxtel/standby_latiss.py on ATQueue to transition all CSCs for LATISS (ATCamera, ATOODS, ATHeaderService, ATSpectrograph) to STANDBY.

Ending the Night

During the shutting down procedures, you can check and complete all logging and administrative tasks including:

  • Finish filling out the night log, including time loss, weather loss, and gathering fault reports for the night.

  • Send the summary and night log link to rubinobs-nightlog mailing list (rubin-night-log [at] lists.lsst.org).

  • Leave the summary of the night on channel #summit-auxtel.

Closing the Vent Gate

This step can be proceed any point of the previous shutdown steps, but it is recommended to do it on the way down to the hotel at the end of the night.

Go up to the AuxTel and

  • Turn off extraction fan.

  • Close all vent gates using the remote controller.

  • Make sure the dome shutter is closed, and the AuxTel and dome are on the parking position. Building should be sealed.

Contingency

In the event that this standard dome and telescope closure procedure fails, and an emergency shutdown is required, refer to the emergency dome closure instructions.

This procedure was last modified on Apr 02, 2025.