../ dmsp_15_ephemeris_20181218.txt 22-Jun-2023 00:39 109440 dmsp_16_ephemeris_20181218.txt 22-Jun-2023 00:39 109392 dmsp_17_ephemeris_20181218.txt 22-Jun-2023 00:39 109292 dmsp_18_ephemeris_20181218.txt 22-Jun-2023 00:39 109347