Re: Barometric Pressure vs Altitude

[LASHLEYT@dteenergy.com]

Using Bob's data the formula would be:

y=1028.4e-4E-5x

where:  x is feet
   and y is in millibars


Tom Lashley
LashleyT@DTEenergy.com

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• To: Multiple recipients of list <radsafe>
• Subject: Re: Barometric Pressure vs Altitude
• From: Bob Flood <bflood@SLAC.Stanford.EDU>
• Date: 30 Jun 99 14:36:26
• In-reply-to: <919B8699AC21D2118B7B00805FCCCC35896B74@mnmail09.nspco.com>
• Reply-to: UNIX2.DECO.COM:radsafe@romulus.ehs.uiuc.edu
• Sender: radsafe@romulus.ehs.uiuc.edu

At 01:06 PM 6/30/99 -0500, you wrote:
>Anyone know a quick thumbrule about barometric pressure vs altitiude, or
>where to find one?

I don't have a formula, but...

Surface pressure - about 1,000 mb (millibars)

Approximations:
850 mb - 5,000 ft
700 mb - 10,000 ft
500 mb	- 18,000 ft
300 mb - 30,000 ft

Hope this is useful.

===================================
Bob Flood
Dosimetry Group Leader
Stanford Linear Accelerator Center
(650) 926-3793
bflood@slac.stanford.edu
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