../ dmsp_15_ephemeris_20101224.txt 22-Jun-2023 00:16 109367 dmsp_16_ephemeris_20101224.txt 22-Jun-2023 00:16 109241 dmsp_17_ephemeris_20101224.txt 22-Jun-2023 00:16 109379 dmsp_18_ephemeris_20101224.txt 22-Jun-2023 00:16 109408