grss.fit.fit_utils

grss.fit.fit_utils#

Utilities for the GRSS orbit determination code

Functions

et2mjd(ephem_time)

Converts JPL NAIF SPICE Ephemeris time to Modified Julian Date.

get_codes_dict()

Creates a dictionary of MPC codes and their corresponding longitude, geocentric latitude, and distance from the geocenter

get_mpc_observatory_info()

Read in the MPC observatory codes and return them as a dictionary.

get_observer_info(obs_df)

Creates a list of observer information for each observer code for passing into a libgrss PropSimulation object

get_radar_codes_dict()

Creates a dictionary of radar codes and their corresponding longitude, geocentric latitude, and distance from the geocenter

get_sbdb_elems(tdes[, cov_elems])

Get a set of desired elements for small body from SBDB API

get_sbdb_info(tdes)

Return small body orbit information from JPL SBDB API

get_sbdb_raw_data(tdes)

Get json data from JPL SBDB entry for desired small body

get_similarity_stats(sol_1, cov_1, sol_2, cov_2)

Get similarity statistics between two solutions.

mjd2et(mjd)

Converts Modified Julian Date to JPL NAIF SPICE Ephemeris time.

parallax_to_lat_lon_alt(lon, rho_cos_lat, ...)

Convert parallax constants to geocentric longitude, latitude, and distance.