../ dmsp_15_ephemeris_20120529.txt 22-Jun-2023 00:20 109467 dmsp_16_ephemeris_20120529.txt 22-Jun-2023 00:20 109531 dmsp_17_ephemeris_20120529.txt 22-Jun-2023 00:20 109682 dmsp_18_ephemeris_20120529.txt 22-Jun-2023 00:20 109626