../ dmsp_15_ephemeris_20210520.txt 22-Jun-2023 00:47 109592 dmsp_16_ephemeris_20210520.txt 22-Jun-2023 00:47 109588 dmsp_17_ephemeris_20210520.txt 22-Jun-2023 00:47 109655 dmsp_18_ephemeris_20210520.txt 22-Jun-2023 00:47 109455