../ dmsp_15_ephemeris_20190821.txt 22-Jun-2023 16:31 109555 dmsp_16_ephemeris_20190821.txt 22-Jun-2023 16:31 109548 dmsp_17_ephemeris_20190821.txt 22-Jun-2023 16:31 109741 dmsp_18_ephemeris_20190821.txt 22-Jun-2023 16:31 109679