varwg.meteo.meteox2y.norm_pressure

varwg.meteo.meteox2y.norm_pressure(p, at, h=454.0)

normalize pressure to sealevel

formula from wikipedia.de for linear temperature gradient 0.0065K/m

Parameters:

pfloat or numpy.array of floats

pressure [hPa]

atfloat or numpy.array of floats

air temperature [deg C]

hfloat, optional

height above sea level of measuring station [m] default value = 454.0 (height of station Stuttgart-Lauchaecker)

Returns:

p_nnfloat or numpy.array of floats

sea level pressure [hPa]

Examples

>>> "%.9f" % norm_pressure(930,10.0)
'982.074383073'

>>> "%.9f" % norm_pressure(930,10.0,h=765)
'1019.090035371'

>>> at = np.array((0.0, 2.5, 5.0, 7.5, 10.0))
>>> p = np.array((925, 930, 935, 932, 931))
>>> norm_pressure(p,at,h=765)
array([1016.98077228,  1021.60706988,  1026.24032953,  1022.10690872,
        1020.18583111])