../ dmsp_15_ephemeris_20180131.txt 22-Jun-2023 00:36 108038 dmsp_16_ephemeris_20180131.txt 22-Jun-2023 00:36 108018 dmsp_17_ephemeris_20180131.txt 22-Jun-2023 00:36 108115 dmsp_18_ephemeris_20180131.txt 22-Jun-2023 00:36 108022