../ dmsp_15_ephemeris_20210530.txt 22-Jun-2023 00:47 109551 dmsp_16_ephemeris_20210530.txt 22-Jun-2023 00:47 109606 dmsp_17_ephemeris_20210530.txt 22-Jun-2023 00:47 109596 dmsp_18_ephemeris_20210530.txt 22-Jun-2023 00:47 109634