../ dmsp_15_ephemeris_20190417.txt 22-Jun-2023 00:40 109675 dmsp_16_ephemeris_20190417.txt 22-Jun-2023 00:40 109561 dmsp_17_ephemeris_20190417.txt 22-Jun-2023 00:40 109644 dmsp_18_ephemeris_20190417.txt 22-Jun-2023 00:40 109704