../ dmsp_15_ephemeris_20180516.txt 22-Jun-2023 16:52 109544 dmsp_16_ephemeris_20180516.txt 22-Jun-2023 16:52 109513 dmsp_17_ephemeris_20180516.txt 22-Jun-2023 16:52 109625 dmsp_18_ephemeris_20180516.txt 22-Jun-2023 16:52 109655