../ dmsp_15_ephemeris_20190601.txt 22-Jun-2023 16:30 109538 dmsp_16_ephemeris_20190601.txt 22-Jun-2023 16:30 109508 dmsp_17_ephemeris_20190601.txt 22-Jun-2023 16:30 109554 dmsp_18_ephemeris_20190601.txt 22-Jun-2023 16:30 109577