../ dmsp_15_ephemeris_20110421.txt 22-Jun-2023 00:17 109660 dmsp_16_ephemeris_20110421.txt 22-Jun-2023 00:17 109787 dmsp_17_ephemeris_20110421.txt 22-Jun-2023 00:17 109673 dmsp_18_ephemeris_20110421.txt 22-Jun-2023 00:17 109813