Converting sea level corrected pressure to actual air pressure

rikoshea_at_yahoo.com
Date: 02/17/05 

Date: 17 Feb 2005 08:57:58 -0800

Hello,
a previous discussion indicated that actual air pressure readings
from places located at altitude (such as Mexico city) are conveted to
sea-level values so that surface pressures from various parts of the
country can be compared.

My question is given a sea-level correct pressure can it be converted
back to
the original actual air pressure and if so what algorithm would be
required ?

I am assuming that parameters such as altitude, air temperature,
relative humidity or dew point temp are available if required as
inputs.

Thanks & regards

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