../ dmsp_15_ephemeris_20110712.txt 22-Jun-2023 00:18 109388 dmsp_16_ephemeris_20110712.txt 22-Jun-2023 00:18 109494 dmsp_17_ephemeris_20110712.txt 22-Jun-2023 00:18 109635 dmsp_18_ephemeris_20110712.txt 22-Jun-2023 00:18 109635