../ dmsp_15_ephemeris_20180421.txt 22-Jun-2023 16:28 109674 dmsp_16_ephemeris_20180421.txt 22-Jun-2023 16:28 109523 dmsp_17_ephemeris_20180421.txt 22-Jun-2023 16:28 109756 dmsp_18_ephemeris_20180421.txt 22-Jun-2023 16:28 109574