../ dmsp_15_ephemeris_20120909.txt 22-Jun-2023 00:20 109635 dmsp_16_ephemeris_20120909.txt 22-Jun-2023 00:20 109629 dmsp_17_ephemeris_20120909.txt 22-Jun-2023 00:20 109683 dmsp_18_ephemeris_20120909.txt 22-Jun-2023 00:20 109791