Difference between "Windbearing" and "CurrWindBearing"

[stefanbagnato]

What is the difference between the "Windbearing" and "CurrWindBearing" entries in SQL? It "looks" like WindBearing may be a rolling average whereas CurrWindBearing is by the minute. However, I took an average of each value for yesterday, and Windbearing was 195 deg while CurrWindBearing was 173 deg, which is a surprising difference being more than 20 deg apart.

[mcrossley]

Windbearing is the last instantaneous wind direction from the station.

CurrWindBearing is the average direction over the last 10 minutes (default) of all the speed/direction readings from the station (so 1 every 2.5 seconds for your Davis) using vector addition.

[stefanbagnato]

Ah okay. Kind of figured one was an average. I am surprised they were that different, but maybe the day was an anomaly.

[mcrossley]

It's not a simple average, it's the result of a vector addition of all the individual reading vectors.