There are about twelve people down at pole working on SPT so things are busy 24 hours a day. During the day the receiver and readout teams have been working on putting the focal plane together and testing the readout. During the night another team works on the guard ring.
The guard ring support structure was finished last night and you can see a beautiful picture of it below:
Yesterday evening Jason, Liz and I finished putting the focal plane together. In one of Liz's earlier posts you can see the feedhorns on the front of the detectors, but now they are covered up with filters (they look orange in the pictures). The filters block out most of the light coming from the sky so that our detectors only see the frequency of light they are designed to observe.
The SPTpol focal plane: