../ dmsp_15_ephemeris_20190806.txt 22-Jun-2023 00:41 109568 dmsp_16_ephemeris_20190806.txt 22-Jun-2023 00:41 109576 dmsp_17_ephemeris_20190806.txt 22-Jun-2023 00:41 109597 dmsp_18_ephemeris_20190806.txt 22-Jun-2023 00:41 109632