../ dmsp_15_ephemeris_20181204.txt 22-Jun-2023 00:39 109345 dmsp_16_ephemeris_20181204.txt 22-Jun-2023 00:39 109462 dmsp_17_ephemeris_20181204.txt 22-Jun-2023 00:39 109312 dmsp_18_ephemeris_20181204.txt 22-Jun-2023 00:39 109193