../ dmsp_15_ephemeris_20110415.txt 22-Jun-2023 00:17 109687 dmsp_16_ephemeris_20110415.txt 22-Jun-2023 00:17 109666 dmsp_17_ephemeris_20110415.txt 22-Jun-2023 00:17 109670 dmsp_18_ephemeris_20110415.txt 22-Jun-2023 00:17 109551