../ dmsp_15_ephemeris_20121205.txt 22-Jun-2023 00:21 109493 dmsp_16_ephemeris_20121205.txt 22-Jun-2023 00:21 109206 dmsp_17_ephemeris_20121205.txt 22-Jun-2023 00:21 109406 dmsp_18_ephemeris_20121205.txt 22-Jun-2023 00:21 109469