../ dmsp_15_ephemeris_20151221.txt 22-Jun-2023 16:17 109370 dmsp_16_ephemeris_20151221.txt 22-Jun-2023 16:17 109229 dmsp_17_ephemeris_20151221.txt 22-Jun-2023 16:17 109299 dmsp_18_ephemeris_20151221.txt 22-Jun-2023 16:17 109378 dmsp_19_ephemeris_20151221.txt 22-Jun-2023 16:17 109274