../ dmsp_15_ephemeris_20110701.txt 22-Jun-2023 00:18 109557 dmsp_16_ephemeris_20110701.txt 22-Jun-2023 00:18 109580 dmsp_17_ephemeris_20110701.txt 22-Jun-2023 00:18 109689 dmsp_18_ephemeris_20110701.txt 22-Jun-2023 00:18 109474