usnognc

This module provides a class for interfacing with the USNO GNC (Guidance Navigation and Control) star catalog.

The GNC catalog provides high-precision astrometric data based on GAIA DR3, Hipparcos, and USNO’s bright star catalog for navigation applications.

Classes

USNOGNC

This class provides an interface to the USNO GNC (Guidance, Navigation, and Control) star catalog.

Function

download_gnc

Download the USNO GNC catalog from the official source.

Constants

DEFAULT_GNC_DIR

This gives the default directory of the GNC catalog file.