../ dmsp_15_ephemeris_20130531.txt 22-Jun-2023 00:22 109522 dmsp_16_ephemeris_20130531.txt 22-Jun-2023 00:22 109524 dmsp_17_ephemeris_20130531.txt 22-Jun-2023 00:22 109731 dmsp_18_ephemeris_20130531.txt 22-Jun-2023 00:22 109541