../ dmsp_15_ephemeris_20210916.txt 22-Jun-2023 16:30 109718 dmsp_16_ephemeris_20210916.txt 22-Jun-2023 16:30 109617 dmsp_17_ephemeris_20210916.txt 22-Jun-2023 16:30 109673 dmsp_18_ephemeris_20210916.txt 22-Jun-2023 16:30 109581