../ dmsp_15_ephemeris_20171122.txt 22-Jun-2023 00:35 109407 dmsp_16_ephemeris_20171122.txt 22-Jun-2023 00:35 109472 dmsp_17_ephemeris_20171122.txt 22-Jun-2023 00:35 109341 dmsp_18_ephemeris_20171122.txt 22-Jun-2023 00:35 109284