../ dmsp_15_ephemeris_20111221.txt 22-Jun-2023 00:19 109215 dmsp_16_ephemeris_20111221.txt 22-Jun-2023 00:19 109314 dmsp_17_ephemeris_20111221.txt 22-Jun-2023 00:19 109385 dmsp_18_ephemeris_20111221.txt 22-Jun-2023 00:19 109394