../ dmsp_15_ephemeris_20211208.txt 22-Jun-2023 17:05 109435 dmsp_16_ephemeris_20211208.txt 22-Jun-2023 17:05 109363 dmsp_17_ephemeris_20211208.txt 22-Jun-2023 17:05 109407 dmsp_18_ephemeris_20211208.txt 22-Jun-2023 17:05 109387