../ dmsp_15_ephemeris_20211013.txt 22-Jun-2023 17:04 109550 dmsp_16_ephemeris_20211013.txt 22-Jun-2023 17:04 109696 dmsp_17_ephemeris_20211013.txt 22-Jun-2023 17:04 109536 dmsp_18_ephemeris_20211013.txt 22-Jun-2023 17:04 109583