../ dmsp_15_ephemeris_20120620.txt 22-Jun-2023 00:20 109503 dmsp_16_ephemeris_20120620.txt 22-Jun-2023 00:20 109669 dmsp_17_ephemeris_20120620.txt 22-Jun-2023 00:20 109591 dmsp_18_ephemeris_20120620.txt 22-Jun-2023 00:20 109397