../ dmsp_15_ephemeris_20210617.txt 22-Jun-2023 00:47 109457 dmsp_16_ephemeris_20210617.txt 22-Jun-2023 00:47 109489 dmsp_17_ephemeris_20210617.txt 22-Jun-2023 00:47 109617 dmsp_18_ephemeris_20210617.txt 22-Jun-2023 00:47 109543