../ dmsp_15_ephemeris_20120904.txt 22-Jun-2023 00:20 109545 dmsp_16_ephemeris_20120904.txt 22-Jun-2023 00:20 109721 dmsp_17_ephemeris_20120904.txt 22-Jun-2023 00:20 109692 dmsp_18_ephemeris_20120904.txt 22-Jun-2023 00:20 109688