../ dmsp_15_ephemeris_20210507.txt 22-Jun-2023 00:47 109541 dmsp_16_ephemeris_20210507.txt 22-Jun-2023 00:47 109672 dmsp_17_ephemeris_20210507.txt 22-Jun-2023 00:47 109640 dmsp_18_ephemeris_20210507.txt 22-Jun-2023 00:47 109619