../ dmsp_15_ephemeris_20190831.txt 22-Jun-2023 00:41 109597 dmsp_16_ephemeris_20190831.txt 22-Jun-2023 00:41 109612 dmsp_17_ephemeris_20190831.txt 22-Jun-2023 00:41 109556 dmsp_18_ephemeris_20190831.txt 22-Jun-2023 00:41 109603