../ dmsp_15_ephemeris_20210420.txt 22-Jun-2023 00:46 109605 dmsp_16_ephemeris_20210420.txt 22-Jun-2023 00:46 109542 dmsp_17_ephemeris_20210420.txt 22-Jun-2023 00:46 109735 dmsp_18_ephemeris_20210420.txt 22-Jun-2023 00:46 109579