../ dmsp_15_ephemeris_20210814.txt 22-Jun-2023 00:47 109624 dmsp_16_ephemeris_20210814.txt 22-Jun-2023 00:47 109499 dmsp_17_ephemeris_20210814.txt 22-Jun-2023 00:47 109590 dmsp_18_ephemeris_20210814.txt 22-Jun-2023 00:47 109577