../ dmsp_15_ephemeris_20161221.txt 22-Jun-2023 00:33 109329 dmsp_16_ephemeris_20161221.txt 22-Jun-2023 00:33 109329 dmsp_17_ephemeris_20161221.txt 22-Jun-2023 00:33 109363 dmsp_18_ephemeris_20161221.txt 22-Jun-2023 00:33 109308