../ dmsp_15_ephemeris_20151221.txt 22-Jun-2023 00:30 109370 dmsp_16_ephemeris_20151221.txt 22-Jun-2023 00:30 109229 dmsp_17_ephemeris_20151221.txt 22-Jun-2023 00:30 109299 dmsp_18_ephemeris_20151221.txt 22-Jun-2023 00:30 109378 dmsp_19_ephemeris_20151221.txt 22-Jun-2023 00:30 109274