../ dmsp_15_ephemeris_20110524.txt 22-Jun-2023 00:17 109551 dmsp_16_ephemeris_20110524.txt 22-Jun-2023 00:17 109709 dmsp_17_ephemeris_20110524.txt 22-Jun-2023 00:17 109615 dmsp_18_ephemeris_20110524.txt 22-Jun-2023 00:17 109697