../ dmsp_15_ephemeris_20190426.txt 22-Jun-2023 16:56 109578 dmsp_16_ephemeris_20190426.txt 22-Jun-2023 16:56 109644 dmsp_17_ephemeris_20190426.txt 22-Jun-2023 16:56 109800 dmsp_18_ephemeris_20190426.txt 22-Jun-2023 16:56 109511