../ dmsp_15_ephemeris_20180414.txt 22-Jun-2023 00:37 109619 dmsp_16_ephemeris_20180414.txt 22-Jun-2023 00:37 109627 dmsp_17_ephemeris_20180414.txt 22-Jun-2023 00:37 109640 dmsp_18_ephemeris_20180414.txt 22-Jun-2023 00:37 109684