../ dmsp_15_ephemeris_20170515.txt 22-Jun-2023 00:34 109556 dmsp_16_ephemeris_20170515.txt 22-Jun-2023 00:34 109524 dmsp_17_ephemeris_20170515.txt 22-Jun-2023 00:34 109583 dmsp_18_ephemeris_20170515.txt 22-Jun-2023 00:34 109684