wind speed too low on WH1080

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Normal usage.

What is the expected output? What do you see instead?
The console shows abobut 2.2 times more wind speed than wfrog for average and 
gust speed of wind.

What version of the product are you using? On what operating system?
wfrog 0.8.1, pywws-11.05_r380, ubuntu 10.04, WH1080

Please provide any additional information below.
Probably stupid, but i've kind of worked around this by adding *2.2 to
/usr/lib/wfrog/wfdriver/station/wh1080.py like this:

e.mean.speed = units.MphToMps(data['wind_ave']*2.2)
e.gust.speed = units.MphToMps(data['wind_gust']*2.2)

There is no mathematical reason for 2.2, but that produces readings close to 
reality...

I'm using m/s units

Original issue reported on code.google.com by karst...@gmail.com on 11 Jun 2011 at 12:20

[GoogleCodeExporter]

It seems that the conversion from mph to mps should not be done. We can remove 
it:

e.mean.speed = data['wind_ave']
e.gust.speed = data['wind_gust']

Jan, can you confirm and make the change?

Original comment by laurent....@gmail.com on 11 Jun 2011 at 1:24

• Changed state: Accepted
• Added labels: Milestone-Release0.9

[GoogleCodeExporter]

There is one little things i cann't declare.
Why the decimal number always is zero by the pressure(1016.0), and not in the 
graphics.
Why there is no rainrate, Is the formula "$unitstr('rain',$units.rain)/h" 
correct ?!
I don't have learned programming with python. So it are questions.
I also think that the conversion from mph to mps should not be done.

Original comment by duinzi...@gmail.com on 24 Jun 2011 at 7:24

Attachments:

• Pressure1.png
• Pressure2.png
• Pressure3.png
• Pressure4.png

[GoogleCodeExporter]

You earlier added an offset for pressure to seaLevel/calibration (thanks :-)

The rain collector is a bit coarse and do not react to light rain. (And bird's 
debris in the protecting net makes it worse). Some propose adding a funnel on 
the collector, making it collect more rain - but that will need scaling.

The general question is: do you plan to make offset+scaling possible on all 
sensors (also multiple) or can I do it myself already somehow?

Original comment by pk2...@gmail.com on 28 Jul 2011 at 3:21

[GoogleCodeExporter]

I hope you make an offset+scaling on all sensors, because i can't program in 
python.
I hope you will publish this here.

Original comment by duinzi...@gmail.com on 3 Aug 2011 at 1:55

[GoogleCodeExporter]

If you can program in python, i hope you will do it for for us all.
I only made some calibration to the driver.

Original comment by duinzi...@gmail.com on 9 Aug 2011 at 8:24