KPF: Pre-Observing | Observing | Post-Observing

Locking down SoCal for High Winds

Owned by Josh Walawender
Last updated: Aug 23, 2024
2 min read

The official procedure is here: https://www.keck.hawaii.edu/draw/CARA/9114/9114-CA3003.pdf the content below was the original source for that procedure.

 

 

 

 

SoCal has external latches to secure the lid in high winds. These are straightforward to operate and it should be doable by anyone who can access the roof.

The latches have no software status, so we need to set an internal software interlock to ensure that SoCal does not try to operate while latched. If you are uncomfortable performing the software operations, call one of the KPF SAs to help.

 

SoCal Latched.jpg
The SoCal enclosure on the roof as viewed from the South-East. The two latches are circled in red. In this photo, the enclosure is latched against wind.

 

Lockdown Procedure

  • If SoCal is currently open and operating, on a KPF machine, run kpfParkSoCal to halt operation.

    • To determine if SoCal is operating, run kpfIsSoCalShutDown on a KPF machine. It will print a status message (e.g. “SoCal is closed and parked”).

    • Alternatively, look at the camera inside the SoCal enclosure. It is listed as “Solar Calibrator” on the Facility Cameras page. Or can be accessed directly (on the internal network) here.

  • On a KPF machine, run kpfDisableSoCal to set a keyword which will disable automatic operations from starting.

  • Proceed to the roof and set both latches.

Please note: there is no need to toggle the local/remote switch in the SoCal electronics box, so there is no need to get the key for the e-box before going to the roof.

Unlock Procedure

  • Proceed to the roof and unlatch both latches.

  • On a KPF machine, run kpfEnableSoCal to allow automated operation to commence at the next scheduled time.