../ dmsp_15_ephemeris_20171206.txt 22-Jun-2023 00:35 109521 dmsp_16_ephemeris_20171206.txt 22-Jun-2023 00:35 109500 dmsp_17_ephemeris_20171206.txt 22-Jun-2023 00:35 109249 dmsp_18_ephemeris_20171206.txt 22-Jun-2023 00:35 109302