BasicP API

description here.

wave_to_freq(wave)	convert Wavelength to Frequency.
freq_to_wave(freq)	convert Frequency to Wavelength.
Dvlocity_to_Dshift(p0, v)	given Doppler velocity and the line central wavelength/frequency, compute Doppler shift in wavelength/frequency.
get_Doppler_width(p0, Te, Vt, am)	Given central wavelength/frequency, relative atomic mass of a line, and the temperature, turbulent velocity, compute the corresponding Doppler Width.
get_Level_gamma(Aji, idxJ, gamma)	Given Einstein A coefficient of Levels, upper index of Lines, compute radiative damping constant for each Level.
get_Line_Gamma(idxI, idxJ, gamma, Gamma)	Given Einstein radiative damping constant of Levels, compute radiative damping constant of Lines.
get_damping_a(_Gamma, _dopWidth_hz)	Given the radiative damping constant and the Doppler Width (in frequency unit) of the line, compute damping constant a.