Jerry, do you have an RM Young or Vaisala radiation shield to put head to head against the Baranti?
They have been around a long time, are 'standard' but very pricey new (eBay has them pretty good once in awhile) and I'm wondering if the new design as taken the passive method one step further towards true ambient temps.
I recall seeing a graph from Young, I think, on how wind speed affects the temperature, based against temperature. It was as much as 4 degrees different on a calm warm day, if I recall.
Are you also logging if there is sunshine vs. overcast to see if there are greater degrees of disparity on a cloudy day vs. sunshine?