../ dmsp_15_ephemeris_20180520.txt 22-Jun-2023 00:37 109495 dmsp_16_ephemeris_20180520.txt 22-Jun-2023 00:37 109455 dmsp_17_ephemeris_20180520.txt 22-Jun-2023 00:37 109740 dmsp_18_ephemeris_20180520.txt 22-Jun-2023 00:37 109627