../ dmsp_15_ephemeris_20211208.txt 22-Jun-2023 00:49 109435 dmsp_16_ephemeris_20211208.txt 22-Jun-2023 00:49 109363 dmsp_17_ephemeris_20211208.txt 22-Jun-2023 00:49 109407 dmsp_18_ephemeris_20211208.txt 22-Jun-2023 00:49 109387