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New rain rate calculation

Discussion specific to Fine Offset and similar rebadged weather stations
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dane
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Re: New rain rate calculation

Post by dane »

Observations with build 583, installed and started about 15:07:
It's drizzling outside.
When Cumulus registers a bucket tip it is added to today's rain.
After a short delay I get a rain rate of 3.6 (or 4.5) mm/hour, and that lasts for 5 minutes.
Then rain rate goes back to zero.

Is that what you intended?

(By the way: no change in rain rate graph)
Ib
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steve
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Re: New rain rate calculation

Post by steve »

dane wrote:After a short delay I get a rain rate of 3.6 (or 4.5) mm/hour, and that lasts for 5 minutes.
Then rain rate goes back to zero.

Is that what you intended?
Yes, that sounds about right, assuming it was just the one tip and then no more in the next 5 minutes.
(By the way: no change in rain rate graph)
Annoyingly, I saw that problem coming, and thought I had fixed it. Inadvertently having two variables with the same name meant that I hadn't really fixed it.

Thanks,
Steve
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dane
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Re: New rain rate calculation

Post by dane »

Yes: only 1 tip about every 20 minutes now.
(But we've had 34.5 mm since midnight :( )
Ib
harrym1byt
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Re: New rain rate calculation

Post by harrym1byt »

Probably not much help, but I have just installed 583 to replace 575. There has been some rain today, mixed in with the odd bit of light snow. My rainfall rate guage shows three separate spikes each individually rising to a peak of (precisely ???) 0.14 inches.
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steve
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Re: New rain rate calculation

Post by steve »

harrym1byt wrote:Probably not much help, but I have just installed 583 to replace 575. There has been some rain today, mixed in with the odd bit of light snow. My rainfall rate guage shows three separate spikes each individually rising to a peak of (precisely ???) 0.14 inches.
If they're on the graph, they'll be from the history data, because of the bug that Ib spotted. But what you're seeing is the sort of thing that the new algorithm will produce.

Steve
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dane
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Re: New rain rate calculation

Post by dane »

Experiences with build 587:
stopped Cumulus at about 20:00 yesterday.
Installed 587 and started Cumulus today.
And rain graphs look "interesting": continuous rain rate of 1.3 mm from 20:00 to restart time.
And rain today restarted at 20:00 until midnight, then restarted at midnight.
Ib
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steve
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Re: New rain rate calculation

Post by steve »

I think in fixing the 'normal running' rain rate, I have broken the 'history data' rain rate. I will check.

It looks like your station's total rain count went back to zero at 20:00. You could check this by looking at the Dec08log.txt file.

Steve
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dane
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Re: New rain rate calculation

Post by dane »

No: total rain count in dec08log.txt looks OK: continues to grow from 282.3 at 20:00 to 285.6 now.
Ib
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steve
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Re: New rain rate calculation

Post by steve »

Could you let me have the last few files from your Diags folder, please?

Steve
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dane
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Re: New rain rate calculation

Post by dane »

Build 589 behaves beautifully: 3.6 mm for 5 minutes for 1 tip.
Thank you.
Ib
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steve
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Re: New rain rate calculation

Post by steve »

Great - thanks. It could have been better, if I could have got the 'intelligent' method to work. But I think this will do for now.

Steve
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TrOjAn
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Re: New rain rate calculation

Post by TrOjAn »

Well I am running the latest release and the rain chart shows no rain, it rained on and off all morning.. Any ideas?

TrOjAn
dc1500
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Re: New rain rate calculation

Post by dc1500 »

Hi Terry, looks like you didn't get enough to get a tip. If you mean this morning, a few lightish showers here which (I'm only three miles from Terry, btw) gave me 0.3mm. Perhaps you only got 0.29 ;-) Probably not Cumulus.
Dave
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TrOjAn
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Re: New rain rate calculation

Post by TrOjAn »

OK Dave, makes sense, I shall keep an eye on it, I was not sure how much a "tip" is so just went by eye.. blimey its raining, that sort of thing :)

TrOjAn
harrym1byt
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Re: New rain rate calculation

Post by harrym1byt »

584 seemed to be misbehaving in that once it saw rain, the line on the Rate graph stayed high and level for a long time -

0.14 inches appeared on the graph at just before 04:00 today and the line stayed at 0.14 until 18:00, when it suddely fell back to zero. I know there has been some rain today, but it has not been continuous, not obviously at exactly the same rate for 14 hours. Cumulus was not running during any of that period, if it makes a difference?

Now updated to 589.
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