../ dmsp_15_ephemeris_20210718.txt 22-Jun-2023 00:47 109576 dmsp_16_ephemeris_20210718.txt 22-Jun-2023 00:47 109583 dmsp_17_ephemeris_20210718.txt 22-Jun-2023 00:47 109613 dmsp_18_ephemeris_20210718.txt 22-Jun-2023 00:47 109506