../ dmsp_15_ephemeris_20110821.txt 22-Jun-2023 00:18 109555 dmsp_16_ephemeris_20110821.txt 22-Jun-2023 00:18 109642 dmsp_17_ephemeris_20110821.txt 22-Jun-2023 00:18 109828 dmsp_18_ephemeris_20110821.txt 22-Jun-2023 00:18 109737