I am watching the sensor package and comparing the values that I see in the AG with the same values reported by other sensors that are nearby and I see a consistent difference that appears way out of range.
My AG Outdoor is located on a post within a few centimeters of max recommended height (203 cm). The location is on the shady side of the post in a garden that is shaded by large trees.
I have a weather station temp/humidity sensor installed about 8m away on a post in a location that is shaded all day long by large trees.
I have an additional sensor package inside a small greenhouse/shed a little less than 5m from the AG.
The weather station reports Temp / Humidity / Heat Index (Feels Like) / Dew Point / VPD
The sensor inside the greenhouse reports Temp / Humidity / Barometric Pressure / Dew Point / VPD
The AG Outdoor reports Temp / Humidity / Heat Index (Feels Like)
Letting Temp = A ; Humidity = B ; Heat Index = C ; Dew Point = D ; VPD = E ; Barometric Pressure = F
Weather station is WS ; AG is AG ; and Greenhouse is SP
For WS we have A = 81.5 ; B = 72 ; C = 85.6 ; D = 71.4 ; E = 0.30 inHg
For AG we have A = 86.2 ; B = 72 ; C = 96
For SP we have A = 88.2 ; B = 61 ; F = 30.16 inHg ; D = 73 ; E = 1.76 kPa (o.52 inHg)
The calculated Heat Index for the AG, though it calculates correctly if you use the documented equation, always is way above the reported Heat Index from the weather station. The weather station closely matches the values reported by wunderground.com for the local area during the day.
I have seen the Heat value regularly reported above 123F at the same time the weather station is reporting a value 15F or more under that.
What part of the calibration am I missing in correlating these values between closely spaced sensor packages?
I do have an anemometer/wind vane installed and it has a solar energy/UV exposure meter. I do not know whether those parameters are considered in the WS correction of Feels Like temp.
The weather station is an assemblage of Ecowitt components with individual sensors placed according to guidelines in locations that are favorable for their accuracy. The exception is the wind vane/anemometer which is not on a tall pole or tower but is closer to the ground than recommended so wind values may be compromised.
The greenhouse sensor is a SensorPush HTP.xw.
I’m trying to understand how to compensate for the differences between these packages.
