../ dmsp_15_ephemeris_20180421.txt 22-Jun-2023 00:37 109674 dmsp_16_ephemeris_20180421.txt 22-Jun-2023 00:37 109523 dmsp_17_ephemeris_20180421.txt 22-Jun-2023 00:37 109756 dmsp_18_ephemeris_20180421.txt 22-Jun-2023 00:37 109574