../ dmsp_15_ephemeris_20110426.txt 22-Jun-2023 00:17 109620 dmsp_16_ephemeris_20110426.txt 22-Jun-2023 00:17 109643 dmsp_17_ephemeris_20110426.txt 22-Jun-2023 00:17 109715 dmsp_18_ephemeris_20110426.txt 22-Jun-2023 00:17 109796