../ dmsp_15_ephemeris_20110601.txt 22-Jun-2023 00:17 109550 dmsp_16_ephemeris_20110601.txt 22-Jun-2023 00:17 109621 dmsp_17_ephemeris_20110601.txt 22-Jun-2023 00:17 109607 dmsp_18_ephemeris_20110601.txt 22-Jun-2023 00:17 109479