../ dmsp_15_ephemeris_20101204.txt 22-Jun-2023 00:16 109323 dmsp_16_ephemeris_20101204.txt 22-Jun-2023 00:16 109317 dmsp_17_ephemeris_20101204.txt 22-Jun-2023 00:16 109391 dmsp_18_ephemeris_20101204.txt 22-Jun-2023 00:16 109476