../ dmsp_15_ephemeris_20180718.txt 22-Jun-2023 00:37 109527 dmsp_16_ephemeris_20180718.txt 22-Jun-2023 00:37 109537 dmsp_17_ephemeris_20180718.txt 22-Jun-2023 00:37 109585 dmsp_18_ephemeris_20180718.txt 22-Jun-2023 00:37 109560