The upwelling IRT on the 25M tower was insufficiently insulated to maintain an internal
reference temperature above 0 degrees C. Measurements of surface temperature were
over-estimated when instrument was below freezing.
Data will be reprocessed, but users can correct data using the following correction
If T_reference < -5?C, then
IRT_corrected = (IRT_original - 32.993K)/0.87238
where T_reference can be estimated with the ambient temperature (e.g.
inst_up_long_hemisp_dome_temp or inst_up_long_dome_temp)