Davis vantage stations report every 2.5 seconds I believe and the rainfall rate is also calculated so. Atleast for stations reporting in rapidfire mode I believe the same value that gets displayed on the console can be sent to WU also?
On Fri, 3 Aug 2018 at 10:43, Andrew Milner <[email protected]> wrote: > Rainfall as a rate is some amount of rain per some defined time period. > OK, we can measure the rain quantity - but what is the time period over > which the rain has fallen?? Instantaneous would be a time period of zero > so would result in zero!! So do we use 1 second, 5 seconds, 10 seconds, 1 > minute, 5 minutes, 10 minutes, or one hour as the time period?? If you use > say 10 seconds then I suppose you need to report every 10 seconds (colossal > overheads at WU if every staion reported every 10 seconds). However, if > you report every 10 minutes but have a rainrate over a 10 second period, > what do you report to WU as the rainrate for the 10 minute period? You > cannot just upload the 10 second rate as over the 10 minute period it would > not be correct!! So, you are almost forced into the current WU arrangement > as possibly being the best compromise situation...….. > > My view anyway ……. > > > > On Friday, 3 August 2018 07:17:13 UTC+3, Praveen Chandrasekaran wrote: >> >> Hi, >> >> I am discussing with Tim Roche of WU over trello on rainfall rate in WU. >> Ideally I would have liked if WU reported instantaneous rainfall rate than >> the accumulated rainfall in last 60 minutes. Here is what Tim Roche replied >> on trello: >> >> Rainfall rate and daily precip are inputs to the PWS data. if they are >> sent we use them. >> >> http://wiki.wunderground.com/index.php/PWS_-_Upload_Protocol >> >> >> I have again replied to him with the below: >> >> >> The PWS upload protocol only has below: >> >> rainin - [rain inches over the past hour)] -- the accumulated rainfall in >> the past 60 min >> >> This is not instantaneous rainfall rate. This is interpreted as the >> rainfall accumulated in past 60 mins and sent by weewx to WU. Some details >> on same in below thread too: >> https://www.wxforum.net/index.php?topic=9155.0 >> >> >> I was just wondering if weewx can be hacked/modified to send >> instantaenous rainfall rates instead of SQLSUM. If so where should I make >> the changes? (restful.py) >> >> >> Maybe others here can also chime in on the trello board so that we can >> sort out this issue. Reporting rainfall over last hour as rainfall rate >> doesn't make sense. Particularly in tropical areas where we may get short 5 >> minutes bursts of rains. >> >> >> Trello board link: >> >> >> https://trello.com/c/roVxyTpV/29-submit-bug-reports-june-july-2018 >> >> >> Regards, >> >> Praveen >> >> >> -- > You received this message because you are subscribed to a topic in the > Google Groups "weewx-user" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/weewx-user/RIPidfs42h0/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
