../ dmsp_15_ephemeris_20170901.txt 22-Jun-2023 16:50 109544 dmsp_16_ephemeris_20170901.txt 22-Jun-2023 16:50 109670 dmsp_17_ephemeris_20170901.txt 22-Jun-2023 16:50 109708 dmsp_18_ephemeris_20170901.txt 22-Jun-2023 16:50 109693