../ dmsp_15_ephemeris_20101218.txt 22-Jun-2023 00:16 109382 dmsp_16_ephemeris_20101218.txt 22-Jun-2023 00:16 109280 dmsp_17_ephemeris_20101218.txt 22-Jun-2023 00:16 109382 dmsp_18_ephemeris_20101218.txt 22-Jun-2023 00:16 109219