../ dmsp_15_ephemeris_20210508.txt 22-Jun-2023 00:47 109686 dmsp_16_ephemeris_20210508.txt 22-Jun-2023 00:47 109632 dmsp_17_ephemeris_20210508.txt 22-Jun-2023 00:47 109547 dmsp_18_ephemeris_20210508.txt 22-Jun-2023 00:47 109523