rain gage jitters

By: kh6dk, 7:55 PM GMT on February 25, 2017

I found at least one source of the rain gage jitter, which was RF from my ham radio station. To try to track it down, I put in scripting to flag jitter in the rain gage input reads - signals occuring within too small a time period to be real, which also incremented the rainfall counter, and noticed this morning while yaking on the radio that the jitter count went up.

Anyway, I installed a bypass cap from the raingage signal line input to ground, and th...

instrumentation

extreme values

By: kh6dk, 3:07 AM GMT on February 25, 2017

The arduino seems to be prone to jitters of some sort and I'm seeing extreme spikes in windspeed and rainfall, cause unknown. Installed couple of bypass caps at the digital/interrupt pin input to ground. In the meantime, I've put in software filters to trap extreme values, like 75 mph gusts and 45 fain gage tips in five seconds - raingage is in the arduino code..

Updated: 7:00 AM GMT on February 25, 2017

Tipping Rain Gage Ideas

By: kh6dk, 6:07 PM GMT on February 24, 2017

Very tippy this gage. Mast mounting is not working out with too much flex in the mast. Vibration seems to the cause of false tips on the gage. A multiple tip event in a short interval e.g. 5 seconds and single tips in the adjacent time frames can be filtered as likely noise, but a single tip cannot without corroboration.

A mast mount is nice though. Maybe try the software approach and watch for false positives and negatives.

A single tip ...

wind/rain package addition

By: kh6dk, 8:56 AM GMT on February 21, 2017

A wind/rain instrument package from Argent Data Systems is now online and in testing. I like the package but have an electrical issues with the anemometer, so while waiting for parts I stood up a work around with a 3144 hall effect sensor mounted to the anemometer housing with a couple of magnets stuck on servo tape. Very nice to have the anemometer and wind vane ... we're still trying a few approaches with the software. Right now there's no attempt at reporting ce...

pws

Front rainfall total 4.45"

By: kh6dk, 6:27 PM GMT on February 13, 2017

... and dry after the front


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Personal Weather Stations

Kalauao Ridge
Aiea, HI
Elevation: 436 ft
Temperature: 66.3 °F
Dew Point: 41.8 °F
Humidity: 41%
Wind: Calm
Wind Gust: 0.0 mph
Updated: 7:45 AM HST on March 01, 2017
Kalauao Ridge
Aiea, HI
Elevation: 436 ft
Temperature: 66.3 °F
Dew Point: 41.8 °F
Humidity: 41%
Wind: Calm
Wind Gust: 0.0 mph
Updated: 7:45 AM HST on March 01, 2017

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