../ dmsp_15_ephemeris_20170905.txt 22-Jun-2023 16:50 109576 dmsp_16_ephemeris_20170905.txt 22-Jun-2023 16:50 109608 dmsp_17_ephemeris_20170905.txt 22-Jun-2023 16:50 109728 dmsp_18_ephemeris_20170905.txt 22-Jun-2023 16:50 109612