../ dmsp_15_ephemeris_20181205.txt 22-Jun-2023 00:39 109366 dmsp_16_ephemeris_20181205.txt 22-Jun-2023 00:39 109401 dmsp_17_ephemeris_20181205.txt 22-Jun-2023 00:39 109262 dmsp_18_ephemeris_20181205.txt 22-Jun-2023 00:39 109294