../ dmsp_15_ephemeris_20210512.txt 22-Jun-2023 00:47 109647 dmsp_16_ephemeris_20210512.txt 22-Jun-2023 00:47 109471 dmsp_17_ephemeris_20210512.txt 22-Jun-2023 00:47 109621 dmsp_18_ephemeris_20210512.txt 22-Jun-2023 00:47 109476