../ dmsp_15_ephemeris_20211212.txt 22-Jun-2023 16:37 109450 dmsp_16_ephemeris_20211212.txt 22-Jun-2023 16:37 109292 dmsp_17_ephemeris_20211212.txt 22-Jun-2023 16:37 109235 dmsp_18_ephemeris_20211212.txt 22-Jun-2023 16:37 109349