../ dmsp_15_ephemeris_20120417.txt 22-Jun-2023 00:19 109609 dmsp_16_ephemeris_20120417.txt 22-Jun-2023 00:19 109793 dmsp_17_ephemeris_20120417.txt 22-Jun-2023 00:19 109683 dmsp_18_ephemeris_20120417.txt 22-Jun-2023 00:19 109667