../ dmsp_15_ephemeris_20130517.txt 22-Jun-2023 00:22 109490 dmsp_16_ephemeris_20130517.txt 22-Jun-2023 00:22 109580 dmsp_17_ephemeris_20130517.txt 22-Jun-2023 00:22 109541 dmsp_18_ephemeris_20130517.txt 22-Jun-2023 00:22 109691