../ dmsp_08_ephemeris_19911221.txt 21-Jun-2023 23:44 109520 dmsp_09_ephemeris_19911221.txt 21-Jun-2023 23:44 109303 dmsp_10_ephemeris_19911221.txt 21-Jun-2023 23:44 109371 dmsp_11_ephemeris_19911221.txt 21-Jun-2023 23:44 109492