../ dmsp_15_ephemeris_20180914.txt 22-Jun-2023 00:38 109650 dmsp_16_ephemeris_20180914.txt 22-Jun-2023 00:38 109700 dmsp_17_ephemeris_20180914.txt 22-Jun-2023 00:38 109689 dmsp_18_ephemeris_20180914.txt 22-Jun-2023 00:38 109514