Martin Rowley wrote:
"Hugh Newbury" wrote ...
Will be very interested to learn where the two rainfall gadgets are
positioned in view of some VERY close rainfall totals by other
correspondents for last month
Exactly 2m apart. The AWS's tipping bucket rim is 1.80m above the
ground.


... but presumably the standard gauge is at ground level?

Yes, standard height and level.

Also, have you had time to perform a check on the AWS gauge by passing
a measured volume of water through it?

Martin, I hadn't thought of that. Just tried it, and it seems to be
working OK, but only when I pour in a small amount very very slowly: eg
in 0.1mm doses into the tipping bucket set at 0.2mm. I'm not convinced
it would work with the sort of heavy rain showers we've been having: I
recently had a shower of 40.0mm/hr for a few minutes which I'm sure
would have swamped the tipping bucket. This is perhaps the cause of the
wide differences between the AWS and Std gauge here last month.

Thanks for the ideas.

Hugh

--

Hugh Newbury

www.evershot-weather.org