../ dmsp_15_ephemeris_20190424.txt 22-Jun-2023 00:40 109594 dmsp_16_ephemeris_20190424.txt 22-Jun-2023 00:40 109638 dmsp_17_ephemeris_20190424.txt 22-Jun-2023 00:40 109708 dmsp_18_ephemeris_20190424.txt 22-Jun-2023 00:40 109531