get_planet_indicies#

VSPEC.helpers.get_planet_indicies(planet_times: astropy.units.Quantity, tindex: astropy.units.Quantity) → tuple[int, int]#

Get the indices of the planet spectra to interpolate over.

This helper function enables interpolation of planet spectra by determining the appropriate indices in the planet_times array. By running PSG once for multiple “integrations” and interpolating between the spectra, computational efficiency is improved.

Parameters:

  • planet_times (astropy.units.Quantity) – The times (cast to since periasteron) at which the planet spectrum was taken.

  • tindex (astropy.units.Quantity) – The epoch of the current observation. The goal is to place this between two elements of planet_times

Returns:

  • int – The index of planet_times before tindex

  • int – The index of planet_times after tindex

Raises:

ValueError – If multiple elements of ‘planet_times’ are equal to ‘tindex’.