../ dmsp_15_ephemeris_20190409.txt 22-Jun-2023 00:40 108230 dmsp_16_ephemeris_20190409.txt 22-Jun-2023 00:40 108237 dmsp_17_ephemeris_20190409.txt 22-Jun-2023 00:40 108235 dmsp_18_ephemeris_20190409.txt 22-Jun-2023 00:40 108252