../ dmsp_15_ephemeris_20120816.txt 22-Jun-2023 00:20 109453 dmsp_16_ephemeris_20120816.txt 22-Jun-2023 00:20 109571 dmsp_17_ephemeris_20120816.txt 22-Jun-2023 00:20 109612 dmsp_18_ephemeris_20120816.txt 22-Jun-2023 00:20 109676