../ dmsp_15_ephemeris_20210816.txt 22-Jun-2023 00:47 109592 dmsp_16_ephemeris_20210816.txt 22-Jun-2023 00:47 109548 dmsp_17_ephemeris_20210816.txt 22-Jun-2023 00:47 109691 dmsp_18_ephemeris_20210816.txt 22-Jun-2023 00:47 109564