../ dmsp_15_ephemeris_20200920.txt 22-Jun-2023 00:45 109601 dmsp_16_ephemeris_20200920.txt 22-Jun-2023 00:45 109568 dmsp_17_ephemeris_20200920.txt 22-Jun-2023 00:45 109560 dmsp_18_ephemeris_20200920.txt 22-Jun-2023 00:45 109567