../ dmsp_15_ephemeris_20211013.txt 22-Jun-2023 16:36 109550 dmsp_16_ephemeris_20211013.txt 22-Jun-2023 16:36 109696 dmsp_17_ephemeris_20211013.txt 22-Jun-2023 16:36 109536 dmsp_18_ephemeris_20211013.txt 22-Jun-2023 16:36 109583