../ dmsp_15_ephemeris_20180927.txt 22-Jun-2023 00:38 109666 dmsp_16_ephemeris_20180927.txt 22-Jun-2023 00:38 109572 dmsp_17_ephemeris_20180927.txt 22-Jun-2023 00:38 109646 dmsp_18_ephemeris_20180927.txt 22-Jun-2023 00:38 109612