../ dmsp_15_ephemeris_20111207.txt 22-Jun-2023 00:19 109481 dmsp_16_ephemeris_20111207.txt 22-Jun-2023 00:19 109281 dmsp_17_ephemeris_20111207.txt 22-Jun-2023 00:19 109311 dmsp_18_ephemeris_20111207.txt 22-Jun-2023 00:19 109400