rss_ringoccs.tools.et_to_spm module

Purpose:

Convert ephemeris time to seconds past midnight (SPM).

Dependencies:

1. numpy
2. spiceypy

rss_ringoccs.tools.et_to_spm.et_to_spm(et_vals, kernels=None, ref_doy=None)

Convert ephemeris time to seconds past midnight.

Arguments

et_vals (float or np.ndarray):  ET seconds past J2000

Keyword Arguments

kernels (str or list):  Path to NAIF kernels ref_doy (int):Reference day of year, typically used for occultations that occur over multiple days

Returns

spm_vals (float or np.ndarray):  Seconds past midnight