[TowerTalk] Wired Anemometer for Tower?

[Roger (K8RI) on TT]

On 4/29/2014 9:59 PM, Jim Lux wrote:
> On 4/29/14, 5:08 PM, Al Kozakiewicz wrote:
>> I'm not going to belabor the point.  Wind speed is derived by 
>> measuring the change in rotational position divided by time.   The 
>> shorter the sampling interval (time), the lower the measurement 
>> accuracy. There is no reason for this to controversial.
>>

Just count the pulses, and divide by time.  Plastic anometers have very 
little rotational mass.

With out getting fancy you can easily get better than 1 mph accuracy.

To me, more than every three seconds is wasted energy/effort/money/time 
as is all the effort expended to measure errors that are meaningless 
unless you want lab accuracy for a study.  Then calibration becomes a 
major portion of the effort. Then you need standards traceable to the 
NBS and someone certified to do it.  Been there and done that, but not 
with anemometers.

73

Roger (K8RI)