Re: correct air pressure

[Chris Alston <alstonc@odrge.odr.georgetown.edu>]

>Date: Thu, 26 Mar 1998 10:10:18 -0600 (CST)
>From: "T. Welty" <tjw@engr.uark.edu>
>X-Sender: tjw@engr
>To: Chris Alston <alstonc@odrge.odr.georgetown.edu>
>Subject: Re: correct air pressure
>
>
>Mr. Alston:
>
>	Our facility is at an altitude of ~1275 ft asl.  The barometric
>pressure at the local airport is corrected to sea level.  Therefore, when
>we first started measuring barometric pressure, there was a discrepancy we
>could not explain at first.
>
>	We learned that the pressure at the airport is corrected to sea
>level so that pilots can reset the altimeter in their aircraft.  The
>barometric pressure we measure with our equipment is considered "station
>pressure" and is as close to the actual pressure that instruments in our
>facility will be exposed to.  I believe there is an approximate correction
>of 1" of Hg per thousand feet.
>
>T. Welty
>
>^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>Tim Welty/Southwest Radiation Calibration Center/Fayetteville, Arkansas
>Phone: 501-575-6309/FAX: -7318/E-mail:tjw@engr.uark.edu
>WWW: web.engr.uark.edu/engr/enrc/srcc.html              17/06/97
>
>
>