We finished the radiometer wiring today.
The data logger we installed to record measurements isn’t working 100%, so we switched to a backup method. We worked so late, we had to stay the night on top of the mountain. The lab has bunks. It got quite cold outside at night, about -14C (7F), but not as cold as the liquid nitrogen (LN2) that arrived by snowcat tonight. The LN2 is about -196 C (-320 F) and we use it for calibration.