The outermost layer of our thermal insulation is, as I mentioned yesterday, a layer of thin aluminized mylar. Dana, Sean and Frank spent most of the day working on this, and got things finished for one module. This will reflect a large amount of the heat and light from the sun, making sure that we keep the instrument at the temperatures we want during flight.
It also makes the payload shiny.
We very much appreciate the flexibility of our BLAST colleagues for letting us use some of their precious payload building space to finish the mylar layer.
In the afternoon, we had our first bit of interesting weather. The sky got overcast and the wind picked up and the visibility got pretty bad, but we still did not get an official change from "Condition 3", which means that it was still considered safe to go outside. It certainly looked ominous, but ended up clearing up again before it was time to go back to McMurdo.
*I got up early to watch my alma mater, Northwestern, find another new and exciting way to lose a football game despite being ahead in the final seconds. I probably should have just stayed asleep.