../ dmsp_15_ephemeris_20111212.txt 22-Jun-2023 16:31 109456 dmsp_16_ephemeris_20111212.txt 22-Jun-2023 16:31 109285 dmsp_17_ephemeris_20111212.txt 22-Jun-2023 16:31 109288 dmsp_18_ephemeris_20111212.txt 22-Jun-2023 16:31 109223