../ dmsp_15_ephemeris_20111211.txt 22-Jun-2023 00:19 109278 dmsp_16_ephemeris_20111211.txt 22-Jun-2023 00:19 109326 dmsp_17_ephemeris_20111211.txt 22-Jun-2023 00:19 109276 dmsp_18_ephemeris_20111211.txt 22-Jun-2023 00:19 109354