../ dmsp_15_ephemeris_20180620.txt 22-Jun-2023 00:37 109496 dmsp_16_ephemeris_20180620.txt 22-Jun-2023 00:37 109515 dmsp_17_ephemeris_20180620.txt 22-Jun-2023 00:37 109648 dmsp_18_ephemeris_20180620.txt 22-Jun-2023 00:37 109537