../ dmsp_15_ephemeris_20121016.txt 22-Jun-2023 00:20 109615 dmsp_16_ephemeris_20121016.txt 22-Jun-2023 00:20 109561 dmsp_17_ephemeris_20121016.txt 22-Jun-2023 00:20 109663 dmsp_18_ephemeris_20121016.txt 22-Jun-2023 00:20 109603