Package observations

Submodules

ivs.observations.airmass: Calculate airmass according to various models.
ivs.observations.barycentric_correction: Compute the influence of earth's orbit around the sun, and absolute stellar velocities
ivs.observations.distance: Calculate the distance to a star with Lutz-Kelker bias
ivs.observations.visibility: This module allows to calculate the altitude and airmass of an object in the sky, to determine whether it is 'observable' during day or night time, and to get the separation to the moon.