../ dmsp_15_ephemeris_20190920.txt 22-Jun-2023 00:41 109582 dmsp_16_ephemeris_20190920.txt 22-Jun-2023 00:41 109668 dmsp_17_ephemeris_20190920.txt 22-Jun-2023 00:41 109688 dmsp_18_ephemeris_20190920.txt 22-Jun-2023 00:41 109594