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 Post subject: Re: Barometer calibration
PostPosted: Wed Dec 21, 2011 1:09 am 
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Joined: Mon Dec 20, 2010 12:12 pm
Posts: 446
Location: Palmerston, NT, Australia
Weather Station: WS-1081 with rain gauge mod
Operating System: Windows 7 & 1.9.3 b1059
steve wrote:
Cumulus does very little with the supplied altitude. It assumes the station has been set up correctly for SLP and reads it directly from the station.

What's this do then? <#altimeterpressure>

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 Post subject: Re: Barometer calibration
PostPosted: Wed Dec 21, 2011 8:37 am 
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Joined: Mon Jun 02, 2008 6:49 pm
Posts: 17613
Location: Sanday, Orkney
Weather Station: Davis VP2
Operating System: Windows Home Server 2011
MickinMoulden wrote:
What's this do then? <#altimeterpressure>

It gives the station pressure corrected to sea level using the altitude of the station only (rather than taking other factors such as temperature into account).

On non-Davis stations, it's exactly the same as sea-level pressure, because those stations only do the simple correction anyway. On Davis stations, which do a more complicated calculation for SLP, it's calculated from various bits of data supplied by the station.

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