../ dmsp_15_ephemeris_20210814.txt 22-Jun-2023 16:36 109624 dmsp_16_ephemeris_20210814.txt 22-Jun-2023 16:36 109499 dmsp_17_ephemeris_20210814.txt 22-Jun-2023 16:36 109590 dmsp_18_ephemeris_20210814.txt 22-Jun-2023 16:36 109577