../ dmsp_15_ephemeris_20191217.txt 22-Jun-2023 00:42 109439 dmsp_16_ephemeris_20191217.txt 22-Jun-2023 00:42 109307 dmsp_17_ephemeris_20191217.txt 22-Jun-2023 00:42 109366 dmsp_18_ephemeris_20191217.txt 22-Jun-2023 00:42 109249