Wind Direction when winds are calm should not be zero

[GaryFunk]

I think you will find that zero wind does not affect the 1 minute average.

This is how WeatherFlow calculates (did the last time I checked) the average.

Calculate wind vector-direction

Here is the code I use to determine average wind direction. Past tests have shown it to match WeatherFow 100%, d is an array of 20 rapid_wind observations and is the formula uses wind speed to “weight” the direction vector. WeatherCalc.calcWind = function(d) { var i, EW_Vector = 0, NS_Vector = 0, gust = 0, lull = 999, s = 0; for (i = 0; i < d.length; i++) { s += d[i][1]; EW_Vector += Math.sin(0.01745329252 * d[i][2]) * d[i][1]; NS_Vector += Math.cos(0.01745329252 * d[i][2]) *…