Here is an article on a homebuilt ultrasonic anemometer I found on Hack A Day:
http://hackaday.com/2013/08/21/ultrasonic-anemometer-for-an-absurdly-accurate-weather-station/
Steve
Here is an article on a homebuilt ultrasonic anemometer I found on Hack A Day:
http://hackaday.com/2013/08/21/ultrasonic-anemometer-for-an-absurdly-accurate-weather-station/
Steve