../ dmsp_15_ephemeris_20180420.txt 22-Jun-2023 16:52 109627 dmsp_16_ephemeris_20180420.txt 22-Jun-2023 16:52 109614 dmsp_17_ephemeris_20180420.txt 22-Jun-2023 16:52 109615 dmsp_18_ephemeris_20180420.txt 22-Jun-2023 16:52 109647