Rainer, Greg,
thank you both for thoughts and hints. Indeed, when I wrote "When
calculated by Weewx itself ("software" option enabled in weewx.conf), my
weather station shows 1001 hPa - still too low", I meant what Weewx
calculates and show on my webpage, not on console's display - display is
completely wrong in my opinion.
According to design of PWS, I own Ambient Weather WS-1001-WiFi clone. I use
HP-1000 driver. I don't know if it is designed wrong or not, but I know
that many people still use it.
Manual for my station say "To determine the relative pressure for your
location, locate an official reporting station near you (the internet is
the best source for real time barometer conditions, such as Weather.com or
Wunderground.com), and set your weather station to match the official
reporting station." I understand it, I should calibrate PWS entering proper
value from METAR for example.
But I still don't understand why Weewx, using "software" option for
calculating the sea-level (relative) pressure, shows too low value. As I
said, my station location AMSL in weewx.conf is "altitude = 550, meter"
(and for me it is neglible if it is 552 or 560; it is fraction of 1 hPa).
So the only way to show "real" value is to calibrate the relative pressure
(barometer in Weewx's terms) on the station's display and set
"prefer_hardware" in weewx.conf? I'm really confused.
Or maybe I have some units in weewx.conf messed up? I use metric system so
I entered meters when it was possible.
czwartek, 31 sierpnia 2023 o 02:39:14 UTC+2 Greg Troxel napisał(a):
> from the wiki page I sent
>
> For example, the FineOffset consoles can display either the station
> pressure (called 'absolute' pressure) or the station pressure plus an
> offset (called 'relative' pressure). T
>
> So Fine Offset equipment just does pressure badly.
>
> So get station pressure into weewx, do software from that, and tape over
> the "relative pressure" display on the console so nobody can see it!
>
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