../ dmsp_15_ephemeris_20121026.txt 22-Jun-2023 00:20 109428 dmsp_16_ephemeris_20121026.txt 22-Jun-2023 00:20 109423 dmsp_17_ephemeris_20121026.txt 22-Jun-2023 00:20 109465 dmsp_18_ephemeris_20121026.txt 22-Jun-2023 00:20 109461