## Re: v215 Rainfall tweak.

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• Grass is just now READY to MOW!!! We have been mowing since March down here! South Steve ...... think south!
Message 1 of 13 , May 2, 2007
Grass is just now READY to MOW!!!

We have been mowing since March down here!

South Steve ...... think south!
• 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
Message 2 of 13 , May 27, 2007

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 always 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 my case). WU states hourly rain of 0.3mm. Also odd increments are seen here. (Carried decimal places I guess) The total at WU is correct 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 instead of the surface area tweak?(more on this later in a sidetrack)

CONCLUSION:
Everyting works really nice, the matters I talk about uneven increments will only be of cosmetic considerations if you plot directly from these values.

SIDETRACK ON BUCKET VOLUME AND ACCURACY:

When doing the maths to derive a tweak factor. I also calculated the theoretic volume needed to get 0,02in or 0,5mm of rain with the original gauge. That added up to 3500mm^3 needed to make it tip. Of course I went ahead to check mine since it was down from the roof.

I spent much time to measure the actual volume needed for mine, and was surprised to find that it took 3800mm^3. Quite a difference. MORE THAN 8%! So I've been under measuring for two years. It has actuelly 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)
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 rainfall/tip tweak so You don't have to come up with a tweak for the tweak (if you know what I mean). OK folks don't loose your sleep over this. But I bet you're gone go out there with a straight edged container and a ruler to see how your's are performing. Maybe some of you will apply a tweak for an unmodified sensor to bias your measurements?

Greetings from Norway and GET WET!
Audun
WS-3600 direct serial
modified raingauge
http://vindkast.com

--- In wuhu_software_group@yahoogroups.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 for
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 middle
of rain shower (messing up my daily and hourly totals), the
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 tweak!

--- In wuhu_software_group@yahoogroups.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.

----

http://home.comcast.net/~wuhu_software/

• Audun, 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 determine the number of
Message 3 of 13 , May 27, 2007
Audun,

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 determine
the number of tips based upon the station type although this could
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
useful.

I am not sure I quite understand the tweak of a tweak. Can you simply
bump up your tweak by another 8% to compensate?

Thanks.

--- In wuhu_software_group@yahoogroups.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
always
> 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 my
> case). WU states hourly rain of 0.3mm. Also odd increments are seen
> here. (Carried decimal places I guess) The total at WU is correct
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
increments
> will only be of cosmetic considerations if you plot directly from
these
> values.
>
>
> SIDETRACK ON BUCKET VOLUME AND ACCURACY:
>
> When doing the maths to derive a tweak factor. I also calculated the
> theoretic volume needed to get 0,02in or 0,5mm of rain with the
original
> gauge. That added up to 3500mm^3 needed to make it tip. Of course I
went
> ahead to check mine since it was down from the roof.
>
> I spent much time to measure the actual volume needed for mine, and
was
> surprised to find that it took 3800mm^3. Quite a difference. MORE
THAN
> 8%! So I've been under measuring for two years [X-(] . It has
actuelly
> 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
rainfall/tip
> tweak so You don't have to come up with a tweak for the tweak (if
you
> know what I mean [;)] ). OK folks don't loose your sleep over this.
But
> I bet you're gone go out there with a straight edged container and a
> ruler to see how your's are performing. Maybe some of you will
apply a
> tweak for an unmodified sensor to bias your measurements?
>
that
>
> Greetings from Norway and GET WET!
> Audun
> WS-3600 direct serial
> modified raingauge
> http://vindkast.com <http://vindkast.com>
>
> --- In wuhu_software_group@yahoogroups.com
> <mailto:wuhu_software_group@yahoogroups.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 for
> 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
middle
> of rain shower (messing up my daily and hourly totals), the
> 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
tweak!
>
>
> --- In wuhu_software_group@yahoogroups.com
> <mailto:wuhu_software_group@yahoogroups.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.
>
> ----
>
>
> http://home.comcast.net/~wuhu_software/
> <http://home.comcast.net/~wuhu_software/>
>
• wuhu, 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 that. I have no
Message 4 of 13 , May 27, 2007
wuhu,
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
that.
I have no problems handlig the rainfall reported today. I round
everything to the exaxt multipples of 0,2mm (which is correct for my
tweak)

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
surface area)

wuhu. Your software is wonderful and, the work you do is truly
amazing.

Audun
http://vindkast.com

--- In wuhu_software_group@yahoogroups.com, "wuhu_software"
<wuhu_software@...> wrote:
>
> Audun,
>
> 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
determine
> the number of tips based upon the station type although this could
> 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
> useful.
>
> I am not sure I quite understand the tweak of a tweak. Can you
simply
> bump up your tweak by another 8% to compensate?
>
> Thanks.
>
>
> --- In wuhu_software_group@yahoogroups.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
> always
> > 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
my
> > case). WU states hourly rain of 0.3mm. Also odd increments are
seen
> > here. (Carried decimal places I guess) The total at WU is correct
> 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
> increments
> > will only be of cosmetic considerations if you plot directly from
> these
> > values.
> >
> >
> > SIDETRACK ON BUCKET VOLUME AND ACCURACY:
> >
> > When doing the maths to derive a tweak factor. I also calculated
the
> > theoretic volume needed to get 0,02in or 0,5mm of rain with the
> original
> > gauge. That added up to 3500mm^3 needed to make it tip. Of course
I
> went
> > ahead to check mine since it was down from the roof.
> >
> > I spent much time to measure the actual volume needed for mine,
and
> was
> > surprised to find that it took 3800mm^3. Quite a difference. MORE
> THAN
> > 8%! So I've been under measuring for two years [X-(] . It has
> actuelly
> > 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
> rainfall/tip
> > tweak so You don't have to come up with a tweak for the tweak (if
> you
> > know what I mean [;)] ). OK folks don't loose your sleep over
this.
> But
> > I bet you're gone go out there with a straight edged container
and a
> > ruler to see how your's are performing. Maybe some of you will
> apply a
> > tweak for an unmodified sensor to bias your measurements?
> >
others
> that
> >
> > Greetings from Norway and GET WET!
> > Audun
> > WS-3600 direct serial
> > modified raingauge
> > http://vindkast.com <http://vindkast.com>
> >
> > --- In wuhu_software_group@yahoogroups.com
> > <mailto:wuhu_software_group@yahoogroups.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
for
> > 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
> middle
> > of rain shower (messing up my daily and hourly totals), the
> > 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
> tweak!
> >
> >
> > --- In wuhu_software_group@yahoogroups.com
> > <mailto:wuhu_software_group@yahoogroups.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.
> >
> > ----
> >