Will add more pictures later…
Hibernation Effort
Yesterday (Dec 9) Peter and I went up to ML to work on the following:
- Remove Heliax cables – Together we were able to remove 29 cables that consisted of a mix of 9-m, 7-m, and 2-m lengths. The cables are stored in the support cone below the telescope and are separated by lengths. We believe we can complete the removal of the Heliax cables within the platform with 2 more days of work (requires two persons).
- Repair right rear exist frame – When we arrived we noticed the metal structure holding the canopy down had broken away. It turn out that the two bolts holding it down were stripped (possibly wrong size to start?) so we replaced them with the correct size. Photo after repair shown here.
- Remove AC plugs for ROACH-2 chassis – When we arrived we found 2 of the 4 ROACH bays were powered up unintentionally via the WTI network power switch, probably as a result of a power failure recovery routine. In order to prevent this from happening in the future we removed the AC power plugs to the rear of all 32 ROACH-2 units. We left the WTI units powered on so that we can perform remote reboots of network switches and other accessories.
- Pull long extension cord from Eaton UPS to Control Container – Being that we will no longer power up the ROACH-2 hardware, we decided to use the large Eaton UPS, model 9170+, to power the PCs and other accessories within the Control Container.
I’ve attached the 6 views of the telescope as it stands today. There is still much to do but hopefully with the stiff Heliax cables out of the way things will go a bit faster.
-Peter, Derek
YTLA network fixed
After troubleshooting the network today, I replaced the media converter (fiber from the visitor building to ethernet) in the junction box outside the control room, and that brought the network back online. Much thanks to Naomi for her remote help.
-Adam
Preparing for hibernation mode
Today Adam and I were at the site preparing the hardware to go into hibernation mode. The ROACH2’s and helium compressors were powered down, which was sad to do. We also opened the shelter to take some pictures of the newly coated dishes and also to patch the shelter fabric.
Adam took pictures of the primary and secondary dishes and emailed them to Sally in Hilo to upload into the dish database. On Thursday, I will have Casandra measure the resistance measurements of the primary and secondary.
Adam also assembled 2 storage racks that went into the storage container and on Thursday, Adam will assemble 2 more that will go into the sleeping container.
I took some pictures of the hardware today and asked Sally to create a YTLA database just for the pictures, so that we will know the location of each hardware, if we need to put it back in the future.
On Thursday, Adam, Casandra and I will start bringing down 2 dishes off the platform to transport down to the hilo lab. Also we will be organizing the sleeping rooms for the storage racks.
Adam, Sally, Casandra, Peter