@EnvBioPhys
What I find hard to understand is this part of your comment:
Fortunately, we (METER, formerly Decagon and UMS) have good scientists on staff that are aware of these issues. The ATMOS 41 has a pyranometer to measure solar radiation and an anemometer to measure wind speed, both of which are primary factors that control solar heating of the temperature sensor.
... which implies that well known companies like the ones mentioned (market references, among others), have been doing all wrong.
On the other hand, you have a low-cost Pyranometer w/ 5% accuracy + a Low Cost Ultrasonic Anemometer w/ 3% accuracy (roughly +/- 8% uncertainty already) ... then you use those values in a "simple energy balance calculation". My deep apology but Energy Balance is not simple at all. Let's forget that for now.
Is your Energy Balance affected by the sun angle of incidence (Direct, Diffuse and Reflected Radiation)?
Do you consider the position of the sun throughout the day?
Do you have GPS built-in to calculate the position of the sun throughout the day?
Just those basic details, will add at least another 5%-10% uncertainty to your "Energy Balance" equation (18% uncertainty and counting).
I could add the decay of humidity sensor (+/- 3%), pressure uncertainty changing everything in
pV=nRT (directly affecting dew point and everything else by the way) ...
Bottom line ... it's physically impossible for you to offer "Accuracy ±0.6 °C", I would optimistically estimate ± 2 to 3 °C, which is fine for some applications but totally inadequate for others (e.g Agriculture).
Your response is not offensive just to me, it is offensive to anyone that knows a little bit of physics or to anyone closely interested in weather measurement.
The main purpose of measuring climate is to understand its evolution and to predict phenomena that can directly affect our safety, our economy ... at the end of the day, our ability to keep the planet healthy for future generations.
± 1 °C variation can destroy a crop, melt an Iceberg or raise the sea level 1 cm.
If you don't see it, it doesn't exist. Spreading ignorance doesn't help.
That's why global warming are FAKE NEWS (if you know what i mean).
Have a good day