../ dmsp_15_ephemeris_20110618.txt 22-Jun-2023 00:17 109456 dmsp_16_ephemeris_20110618.txt 22-Jun-2023 00:17 109499 dmsp_17_ephemeris_20110618.txt 22-Jun-2023 00:17 109586 dmsp_18_ephemeris_20110618.txt 22-Jun-2023 00:17 109578