../ dmsp_15_ephemeris_20120819.txt 22-Jun-2023 00:20 109576 dmsp_16_ephemeris_20120819.txt 22-Jun-2023 00:20 109694 dmsp_17_ephemeris_20120819.txt 22-Jun-2023 00:20 109649 dmsp_18_ephemeris_20120819.txt 22-Jun-2023 00:20 109741