def test_absoluteairmass():
relative_am = airmass.relativeairmass(ephem_data['zenith'], 'simple')
airmass.absoluteairmass(relative_am)
airmass.absoluteairmass(relative_am, pressure=100000)
def run_airmass(zenith, model):
airmass.relativeairmass(zenith, model)
