download_gnc

giant.catalogs.usnognc:

giant.catalogs.usnognc.download_gnc(target_directory, verify_checksum=True)[source]

Download the USNO GNC catalog from the official source.

This function downloads the GNC catalog CSV file and optionally verifies its integrity using the provided SHA256 checksum.

Parameters:

  • target_directory (Path) – Directory to save the catalog file

  • verify_checksum (bool) – Whether to verify the downloaded file’s checksum