Vaisala BAROCAP PTB330, User Manual

Page: 130 / 139

User's Guide ______________________________________________________________________
128 _________________________________________________________________ M210855EN-C
0706-110
0706-111
where:
H
QNH
= station elevation [m]
g =
9.81 [m/s
2
]
R = 287 [J/kg/K]
T = 288.15 [K]
= -0.0065 [K/m]
where
p = measured air pressure [hPa]
h
HCP
= height difference between the barometer and reference
level [m]