[time-nuts] Weather/units question for European members
paulswedb at gmail.com
Fri May 23 21:36:58 EDT 2014
I think wind speed is also in Bueforts. Pretty sure thats misspelled.
On Fri, May 23, 2014 at 9:16 PM, Mark Sims <holrum at hotmail.com> wrote:
> I am building a weather sensor that includes a ultrasonic anemometer to
> measure wind speed, direction, and air temperature. It uses 4 cheap ($1
> each) HC-SR04 ultrasonic rangefinder modules that output a pulse width
> proportional to the time of flight of the sound signal (topic is time nut
> related since it simultaneously measures the speed of sound in 4
> directions to a pretty good accuracy/resolution using a cheap-ass
> microprocessor - ATMEGA328 (like and Arduino)... and does so without using
> any counter-timer channels).
> Now the question... I would like it to be able to output data in imperial
> or metric units. In what units is the typical wind speed reported
> (meters/sec, km/hour, ?). Also air pressure
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