6586Re: v215 Rainfall tweak.
- May 27, 2007wuhu,
Maybe it's only a typo from you, but 1[in]=25.4[mm]. When it comes to
adding a tweaked rainfall to currdat.lst. I can't see the need for
I have no problems handlig the rainfall reported today. I round
everything to the exaxt multipples of 0,2mm (which is correct for my
And you've got the point of tweaking the weak. The bump of 8% is the
twek of the tweak :) (adding more to the tweak than just increased
wuhu. Your software is wonderful and, the work you do is truly
--- In firstname.lastname@example.org, "wuhu_software"
> WUHU simply does a conversion from mm to Inches (1 Inche=24.4 mm).
> Neither the console or HW report the bucket tips. You could
> the number of tips based upon the station type although this couldsimply
> prove to be tricky.
> As far as the currdat.lst data, I thought maybe I could output a
> seperate field for [rain_total] to show the tweaked rainfall total,
> something like [tweaked_rain_total]. Let me know if this would be
> I am not sure I quite understand the tweak of a tweak. Can you
> bump up your tweak by another 8% to compensate?my
> --- In email@example.com, "fikkaud"
> <audun.fikke@> wrote:
> > Feedback on Rain Tweak:
> > WUHU is working fine with my modified raingauge and the new tweak
> > applied.
> > I have observed the following:
> > General:
> > currdat.lst increments rainfall changes between two values. This
> must be
> > due to decimals carried on within WUHU. The total will ofcourse
> > be correct. I guess It's always been like this.
> > Q: What is the exact rainfall/tip used by WUHU in it's
> calculations? Is
> > it 0.02in = 0.508mm?
> > Weather Underground:
> > Every rain shower starts with a tweaked measurement of 0.19mm (in
> > case). WU states hourly rain of 0.3mm. Also odd increments areseen
> > here. (Carried decimal places I guess) The total at WU is correctthe
> by the
> > end of the day.
> > My raingauge is modified (and tested) to give exactly 0.20mm/tip
> > (~0.008in). Maybe it's better to have a fixed 'rain/tip' value
> > of the surface area tweak?(more on this later in a sidetrack)
> > CONCLUSION:
> > Everyting works really nice, the matters I talk about uneven
> > will only be of cosmetic considerations if you plot directly from
> > values.
> > SIDETRACK ON BUCKET VOLUME AND ACCURACY:
> > When doing the maths to derive a tweak factor. I also calculated
> > theoretic volume needed to get 0,02in or 0,5mm of rain with theI
> > gauge. That added up to 3500mm^3 needed to make it tip. Of course
> > ahead to check mine since it was down from the roof.
> > I spent much time to measure the actual volume needed for mine,
> > surprised to find that it took 3800mm^3. Quite a difference. MORE
> > 8%! So I've been under measuring for two years [X-(] . It has
> > dripped down 150tonnes of water on my land that I didn't catch. (I
> > know... Weather freak....but I don't have that much land either
> [:D] )
> > This makes it apparent that there are individual differences from
> > production, friction and maybe other sources of error.
> > During the last showers I've got my measurements verified against
> > measurements taken with ancient rain measurement techniques.
> > So fellow rainmakers, this is the reason I'm asking for a
> > tweak so You don't have to come up with a tweak for the tweak (if
> > know what I mean [;)] ). OK folks don't loose your sleep over
> Butand a
> > I bet you're gone go out there with a straight edged container
> > ruler to see how your's are performing. Maybe some of you willothers
> apply a
> > tweak for an unmodified sensor to bias your measurements?
> > Instead of spinning your heads on this topic I do agree with
> > you should start uploading your webcams to WU instead. I do.
> > Greetings from Norway and GET WET!
> > Audun
> > WS-3600 direct serial
> > modified raingauge
> > http://vindkast.com <http://vindkast.com>
> > --- In firstname.lastname@example.org
> > <mailto:email@example.com> , "Mike Frerkes"
> > <mfrerkes@> wrote:
> > I have installed the new version of WUHU and it appears to be
> > working
> > very well. Luckily it has been raining non-stop where I live
> > the
> > last 24 hours, so I was able to test it with a real weather
> > scenario. Although I switched from VWS to WUHU right in the
> > of rain shower (messing up my daily and hourly totals), the
> > readings
> > were similar to those of two other nearby stations.
> > With the new funnel I've attached to my WMR, the rainfall
> > resolution
> > is now .008 inches. The modifications I've made aren't
> > aesthetically
> > pleasing...but it gets the job done. Thanks for adding this
> > --- In firstname.lastname@example.org
> > <mailto:email@example.com> , "wuhu_software"
> > <wuhu_software@> wrote:
> > I have created a new version of WUHU with a rainfall tweak.
> > Please test it if you have a need, otherwise hold off.
> > Feedback appreciated.
> > ----
> > Software Download:
> > http://home.comcast.net/~wuhu_software/
> > <http://home.comcast.net/~wuhu_software/>
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