../ dmsp_15_ephemeris_20200412.txt 22-Jun-2023 16:33 109642 dmsp_16_ephemeris_20200412.txt 22-Jun-2023 16:33 109661 dmsp_17_ephemeris_20200412.txt 22-Jun-2023 16:33 109838 dmsp_18_ephemeris_20200412.txt 22-Jun-2023 16:33 109526