../ dmsp_15_ephemeris_20170817.txt 22-Jun-2023 16:50 109590 dmsp_16_ephemeris_20170817.txt 22-Jun-2023 16:50 109592 dmsp_17_ephemeris_20170817.txt 22-Jun-2023 16:50 109691 dmsp_18_ephemeris_20170817.txt 22-Jun-2023 16:50 109535