QFE2QFF: QFE2QFF
In jonasbhend/pressurehelper: Convert historical air pressure records

Description Usage Arguments Details Examples

Reduce absolute atmospheric pressure to sea level

1	QFE2QFF(QFE, elevation, latitude, temperature)

`QFE`	local atmospheric pressure (in hPa)
`elevation`	height AMSL of barometer (in m)
`latitude`	latitude of station (in degree)
`temperature`	air temperature at station (in Kelvin)

The mean temperature of the fictituous air column between station elevation and sea level is estimated using a lapse rate of 0.0065 K/m.

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## should be a 1000 hPa at sea level
QFE2QFF(990, elevation=88, latitude=15, temperature=298.15)
QFE2QFF(990, elevation=88, latitude=15, temperature=25)