Hi Marlon
three more remarks:
1. comparing to neighbouring environment may not always be helpful - as
rainfall is not a homogeneous phenomenon and 100 m away from your sensor
there may even be no rainfall at all - or vice versa. A proper manual
gauge close to your sensor makes more sense.
2. your WH65 arrray with its rain gauge may not be at the same height as
your manual gauge ! To be considered.
Did you clean your rain gauge (WH65) properly ?
3. if you are looking for more accuracy:
get yourself a WH40 with a rim height extension
(https://www.wxforum.net/index.php?topic=44074.0) and a GW1100 (or
GW2000) as your WH2910 console (Froggit WH3000SE) cannot receive the
WH40 - mount it at 1-1.5 m above ground and put your manual gauge close
to it - same height.
Use a calibration factor of 1.02 for the WH40 - due to imperial/metric
conversion.
And then you are much better set for your endeavours.
Your issue(s) is(are) in my opinion not weewx related but
console/sensor/location related.
On 06.11.2023 08:18, Marlon wrote:
Thank you Rainer and Gary
The effortnis greatly appreciated and I will find a way to give back
to weewx community for this.
There's a lot here on the last posts that have given me a lot of food
for thought. Im going to have to launch a huge project here to find
the way these other sites have created discrepancies and how I can fix
that to get the data normalised.
The 824mm is the amount that matches my plastic guage and neighbouring
farms, So it's the number I need to work towards.
Once I have that figured out, there's still the original question of
whether the new events into wee will work after the interval change.
Strangest thing is getting the same weirdness from Wu, weathercloud,
ecowitt, etc. That does make the console sound guilty, but with that
said, that number is most correct. Confusing.
But I'll then post the findings here, and possibly some code so that
this thread can have the usefulness to others in the future.
Thank you
Marlon
On Monday, 06 November 2023 at 09:04:02 UTC+2 Rainer Lang wrote:
summary data shown on the ecowitt.net <http://ecowitt.net>
dashboard are the values from the console and can be changed by
the user in the console. At ecowitt.net <http://ecowitt.net> no
summarizing is done for the displayed tiles, just display of what
the console sends. What is shown there is user responsibility. If
the user makes adjustments, they are simply taken over and
displayed. => you can only conditionally expect accuracy in the
summary counts - it may or may not not match the really stored
5-minute (or longer period summarized data depending on the
retention policy) data. (we can see the discrepancies between
import summaries, NOAA summaries and dashboard tile summaries)
If there is a discrepancy between this summary data shown on the
dashboard tiles and the summarized end-of-day data for rain, this
is most likely user caused. (800+ vs. 470)
Data from the import was all properly stored - discrepancies are
likely to be user caused and not we_import caused.
On 06.11.2023 05:48, gjr80 wrote:
I have spent this morning working through the csv data, the NOAA
format reports on your web site and the data on Ecowitt.net.
There are a couple of issues going on. First, the bulk of the
difference between the Ecowitt.net yearly rainfall (presently
showing 824.1mm) and that imported by wee_import (approx 507mm)
is due to data inconsistencies on Ecowitt.net. The yearly
rainfall value displayed by Ecowitt.net is taken from the yearly
rain field (presumably uploaded by the station). If you look
through the 2023 tabulated data for the station on Ecowitt.net
you will see the yearly rainfall value was non-existent until 6
June when it took on the value 585.1mm, but if you sum the
monthly rainfall values from 1 January until 6 June you get
something of the order of 254mm (it is impossible to say exactly
due to discrepancies between the values in the various
Ecowitt.net rain fields). This accounts for some 330mm of the
difference. I have also found at least one place where the
Ecowitt.net rain data goes backwards (23 February 06:00 monthly
rainfall is 5.6mm, the 10:00 entry indicates 0.8mm fell taking
the monthly total to 6.6mm, the 14:00 entry shows no rain but the
monthly value jumps back to 5.6mm), whilst this may or may not
impact the import (it depends on how the import is setup) it begs
the question are there other data discrepancies that may impact
the import. I haven't yet checked for any other similar
discrepancies.
I have also noticed discrepancies in the NOAA format reports. For
some reason the 2023 report shows the March rainfall as 100.8mm,
whereas the March 2023 report shows a monthly total of 105.6mm.
The archive and daily summary tables both have 105.6mm for March,
but for some reason the monthly report is off. Ecowitt.net also
shows 105.6mm for March. Similarly in October. The October 2023
report shows 28.4mm but the 2023 reports shows October with
27.1mm, the archive and daily summary tables both record 28.4mm.
I will have to look at this further, but at present I would be
wary of rainfall in the yearly NOAA reports; the monthly reports
seem to show the true value.
So far I have not been able to fault wee_import.
Gary
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