../ dmsp_15_ephemeris_20121025.txt 22-Jun-2023 00:20 109627 dmsp_16_ephemeris_20121025.txt 22-Jun-2023 00:20 109470 dmsp_17_ephemeris_20121025.txt 22-Jun-2023 00:20 109517 dmsp_18_ephemeris_20121025.txt 22-Jun-2023 00:20 109493