../ dmsp_15_ephemeris_20111205.txt 22-Jun-2023 00:18 109300 dmsp_16_ephemeris_20111205.txt 22-Jun-2023 00:18 109289 dmsp_17_ephemeris_20111205.txt 22-Jun-2023 00:18 109334 dmsp_18_ephemeris_20111205.txt 22-Jun-2023 00:18 109448