../ dmsp_15_ephemeris_20190721.txt 22-Jun-2023 00:41 109567 dmsp_16_ephemeris_20190721.txt 22-Jun-2023 00:41 109527 dmsp_17_ephemeris_20190721.txt 22-Jun-2023 00:41 109689 dmsp_18_ephemeris_20190721.txt 22-Jun-2023 00:41 109493