../ dmsp_15_ephemeris_20200417.txt 22-Jun-2023 16:33 109638 dmsp_16_ephemeris_20200417.txt 22-Jun-2023 16:33 109568 dmsp_17_ephemeris_20200417.txt 22-Jun-2023 16:33 109662 dmsp_18_ephemeris_20200417.txt 22-Jun-2023 16:33 109652