../ dmsp_15_ephemeris_20191001.txt 22-Jun-2023 00:42 109576 dmsp_16_ephemeris_20191001.txt 22-Jun-2023 00:42 109700 dmsp_17_ephemeris_20191001.txt 22-Jun-2023 00:42 109596 dmsp_18_ephemeris_20191001.txt 22-Jun-2023 00:42 109614