On Wednesday, October 1, 2014 8:31:13 AM UTC+1, wrote:
"Dave Cornwell" wrote in message

...

David Mitchell wrote:

About �39/49/59 for the Three models, the cheapest looks a reasonable

option.

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Christmas list?





I have a wind speed app already on my phone. Cost �1-50. It works by

analysing the spectrum of sounds as it blows over the microphone. Filters

out other noise so very clever. It is really very good and will give an

accurate beaufort force. WSM wind speed monitor for i and android.

For temperature I wave my hands around (accurate to 1 degree) :-)

The phone has a temperature sensor but takes a long while to react to being

out of my pocket. I also have ViewRanger gps which will give altitude and

therefore pressure. Humidity is measured by how much I am sweating allowing

for terrain and slope (accurate to 10%) :-)



Will

--

http://www.lyneside.demon.co.uk/Hayt...antage_Pro.htm

Will Hand (Haytor, Devon, 1017 feet asl)

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and now do the Zambretti calculation