def get_equivalencies():
"""
Return a list of example equivalencies for testing serialization.
"""
return [
eq.plate_scale(.3 * u.deg / u.mm),
eq.pixel_scale(.5 * u.deg / u.pix),
eq.spectral_density(350 * u.nm, factor=2),
eq.spectral_density(350 * u.nm),
eq.spectral(),
eq.brightness_temperature(500 * u.GHz),
eq.brightness_temperature(500 * u.GHz, beam_area=23 * u.sr),
eq.with_H0(),
eq.temperature_energy(),
eq.temperature(),
eq.thermodynamic_temperature(300 * u.Hz),
eq.thermodynamic_temperature(140 * u.GHz, Planck15.Tcmb0),
eq.beam_angular_area(3 * u.sr),
eq.mass_energy(),
eq.molar_mass_amu(),
eq.doppler_relativistic(2 * u.m),
eq.doppler_optical(2 * u.nm),
eq.doppler_radio(2 * u.Hz),
eq.parallax(),
eq.logarithmic(),
eq.dimensionless_angles(),
eq.spectral() + eq.temperature(),
(eq.spectral_density(35 * u.nm) +
eq.brightness_temperature(5 * u.Hz, beam_area=2 * u.sr)),
(eq.spectral() + eq.spectral_density(35 * u.nm) +
eq.brightness_temperature(5 * u.Hz, beam_area=2 * u.sr))
]
def freq_to_velo(freqcoord, veloframe):
return OpticalVelocity(freqcoord.f.to(veloframe.representation_component_units.values()[0], equivalencies=eq.doppler_optical(veloframe.rest)))
def freq_to_velo(freqcoord, veloframe):
wavelength = list(freqcoord.f.to(list(veloframe.representation_component_units.values())))[0]
return OpticalVelocity(wavelength, equivalencies=eq.doppler_optical(veloframe.rest))
def freq_to_velo(freqcoord, veloframe):
return OpticalVelocity(
freqcoord.f.to(veloframe.representation_component_units.values()[0],
equivalencies=eq.doppler_optical(veloframe.rest)))