../ dmsp_15_ephemeris_20120821.txt 22-Jun-2023 00:20 109628 dmsp_16_ephemeris_20120821.txt 22-Jun-2023 00:20 109677 dmsp_17_ephemeris_20120821.txt 22-Jun-2023 00:20 109724 dmsp_18_ephemeris_20120821.txt 22-Jun-2023 00:20 109695