We did have a failure on the 3DR radio at -51 F. Radio died and won't come back.
We used the APRS.FI tracking as well and it showed great.
As you can see, there is NO insulation in our fiberglass box. Cameras on outside have no insulation.
All electronics worked for 3 flights now and still work (except the 3DR)
Sparkfun datalogger worked this time. I need to DL the APM2 data yet.