../ dmsp_15_ephemeris_20181021.txt 22-Jun-2023 00:38 109567 dmsp_16_ephemeris_20181021.txt 22-Jun-2023 00:38 109544 dmsp_17_ephemeris_20181021.txt 22-Jun-2023 00:38 109517 dmsp_18_ephemeris_20181021.txt 22-Jun-2023 00:38 109495