../ dmsp_15_ephemeris_20170519.txt 22-Jun-2023 16:49 109398 dmsp_16_ephemeris_20170519.txt 22-Jun-2023 16:49 109561 dmsp_17_ephemeris_20170519.txt 22-Jun-2023 16:49 109584 dmsp_18_ephemeris_20170519.txt 22-Jun-2023 16:49 109496