../ dmsp_15_ephemeris_20190928.txt 22-Jun-2023 00:41 109562 dmsp_16_ephemeris_20190928.txt 22-Jun-2023 00:41 109726 dmsp_17_ephemeris_20190928.txt 22-Jun-2023 00:41 109715 dmsp_18_ephemeris_20190928.txt 22-Jun-2023 00:41 109655