../ dmsp_15_ephemeris_20170508.txt 22-Jun-2023 00:34 109494 dmsp_16_ephemeris_20170508.txt 22-Jun-2023 00:34 109608 dmsp_17_ephemeris_20170508.txt 22-Jun-2023 00:34 109573 dmsp_18_ephemeris_20170508.txt 22-Jun-2023 00:34 109687