TAT probe indication - A320
During icing conditions the probe heat is selected when on the ground. The TAT probe is not heated in this case, so, my question is, how accurate is the SAT on the ground? I mean, if the ATIS is indicating zero degrees, but the SAT shows 2 or 3 degrees (after several hours sitting at the bay), is it ok to use what is indicated on this system?
Many thanks.