../ dmsp_15_ephemeris_20190423.txt 22-Jun-2023 16:55 109558 dmsp_16_ephemeris_20190423.txt 22-Jun-2023 16:55 109577 dmsp_17_ephemeris_20190423.txt 22-Jun-2023 16:55 109704 dmsp_18_ephemeris_20190423.txt 22-Jun-2023 16:55 109675