../ dmsp_15_ephemeris_20110601.txt 22-Jun-2023 16:29 109550 dmsp_16_ephemeris_20110601.txt 22-Jun-2023 16:29 109621 dmsp_17_ephemeris_20110601.txt 22-Jun-2023 16:29 109607 dmsp_18_ephemeris_20110601.txt 22-Jun-2023 16:29 109479