../ dmsp_15_ephemeris_20210514.txt 22-Jun-2023 00:47 109653 dmsp_16_ephemeris_20210514.txt 22-Jun-2023 00:47 109660 dmsp_17_ephemeris_20210514.txt 22-Jun-2023 00:47 109594 dmsp_18_ephemeris_20210514.txt 22-Jun-2023 00:47 109557