On Mon, Aug 1, 2016 at 10:16 AM, jmltech <[email protected]> wrote:
> > 1) The VWS data does not have dewpoint, heatindex or windgust10 values. > Do I need to add these values to the archive table as I'm inputting records? > > If you want to produce reports and plots with dewpoint and heatindex then, yes, you should calculate them and include them. For windgust, if you don't have it stored in the VWS database, then it's gone. Nothing you can do about it. > 2) I have tested my installation using the simulator, then switched over > to test the davis driver. All seems to be working. After a few minutes, I > switched the VWS data logger back to VWS so that I wouldn't miss any > records. If I start with a new archive table (using sql to delete current > test records) will there be any issues after I update the table with all of > my VWS archived records? > Don't see why there would be. Am I missing something? > > 3) The VWS had an archive rate of 15 minutes. Can I switch to 5 minutes > once I switch over to weewx, or will this cause problems with historical > averages? > In theory, this should not be a problem but, unfortunately, there is a flaw in the daily summaries tables (issue #61 <https://github.com/weewx/weewx/issues/61>) that prevents changing the archive interval. We have a fix in the works, so it should eventually be OK. In any case, even without the fix, there is only a problem with averages that span across the change in archive interval boundary. Highs and lows will be fine. > 4) is storing this many records in an sqlite table okay? > > Nine years of data at a 15 minute sampling rate is actually not that much. My own station has 10 years at a 5 minute sampling rate --- about 170 MB --- and it's never been an issue. > 5) any other gotchas in doing a conversion to weewx? > Please note that field 'rain' is the amount of rain that fell *during that archive interval*. That is, it's the amount of rain that fell in the five minute sampling window. Also, see the Wiki <https://github.com/weewx/weewx/wiki/Barometer,-pressure,-and-altimeter>for the differences between the three different kinds of pressure: barometer, pressure, and altimeter. -tk -- 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.
