../ dmsp_15_ephemeris_20180312.txt 22-Jun-2023 00:36 108230 dmsp_16_ephemeris_20180312.txt 22-Jun-2023 00:36 108100 dmsp_17_ephemeris_20180312.txt 22-Jun-2023 00:36 108249 dmsp_18_ephemeris_20180312.txt 22-Jun-2023 00:36 108121