../ dmsp_15_ephemeris_20181208.txt 22-Jun-2023 00:39 109444 dmsp_16_ephemeris_20181208.txt 22-Jun-2023 00:39 109434 dmsp_17_ephemeris_20181208.txt 22-Jun-2023 00:39 109344 dmsp_18_ephemeris_20181208.txt 22-Jun-2023 00:39 109277