../ dmsp_15_ephemeris_20190313.txt 22-Jun-2023 00:40 108256 dmsp_16_ephemeris_20190313.txt 22-Jun-2023 00:40 108226 dmsp_17_ephemeris_20190313.txt 22-Jun-2023 00:40 108247 dmsp_18_ephemeris_20190313.txt 22-Jun-2023 00:40 108172