def wavelength(self, wavelength):
setattr(self, "_wavelength", wavelength)
if not isinstance(wavelength, Quantity):
valerr = ValueError(
'Wavelength range must be a sequence with exactly two values',
'expressing a frequency or wavelength range')
try:
# assume meters
wavelength = wavelength * Unit("meter")
except ValueError:
raise valerr
try:
if len(wavelength) != 2:
raise valerr
except TypeError:
raise valerr
# transform to meters
wavelength = wavelength.to(Unit("m"),
equivalencies=spectral_equivalencies())
# frequency is counter-proportional to wavelength, so we just sort it
# to have the right order again
wavelength.sort()
self["WAVELENGTH"] = "{start}/{end}".format(start=wavelength.value[0],
end=wavelength.value[1])
def band(self, band):
setattr(self, "_band", band)
if not isinstance(band, Quantity):
valerr = ValueError(
'Band must be a sequence with exactly two values',
'expressing a frequency or wavelength range')
try:
# assume meters
band = band * Unit("meter")
except ValueError:
raise valerr
try:
if len(band) != 2:
raise valerr
except TypeError:
raise valerr
# transform to meters
band = band.to(Unit("m"), equivalencies=spectral_equivalencies())
# frequency is counter-proportional to wavelength, so we just sort
# it to have the right order again
band.sort()
self["BAND"] = "{start}/{end}".format(
start=band.value[0], end=band.value[1])
def band(self, band):
setattr(self, "_band", band)
if not isinstance(band, Quantity):
valerr = ValueError(
'Band must be a sequence with exactly two values',
'expressing a frequency or wavelength range')
try:
# assume meters
band = band * Unit("meter")
except ValueError:
raise valerr
try:
if len(band) != 2:
raise valerr
except TypeError:
raise valerr
# transform to meters
band = band.to(Unit("m"), equivalencies=spectral_equivalencies())
# frequency is counter-proportional to wavelength, so we just sort
# it to have the right order again
band.sort()
self["BAND"] = "{start}/{end}".format(
start=band.value[0], end=band.value[1])
