../ dmsp_15_ephemeris_20210612.txt 22-Jun-2023 17:02 109535 dmsp_16_ephemeris_20210612.txt 22-Jun-2023 17:02 109575 dmsp_17_ephemeris_20210612.txt 22-Jun-2023 17:02 109735 dmsp_18_ephemeris_20210612.txt 22-Jun-2023 17:02 109596