../ dmsp_15_ephemeris_20151231.txt 22-Jun-2023 00:30 109494 dmsp_16_ephemeris_20151231.txt 22-Jun-2023 00:30 109377 dmsp_17_ephemeris_20151231.txt 22-Jun-2023 00:30 109201 dmsp_18_ephemeris_20151231.txt 22-Jun-2023 00:30 109325 dmsp_19_ephemeris_20151231.txt 22-Jun-2023 00:30 109373