../ dmsp_15_ephemeris_20210617.txt 22-Jun-2023 16:35 109457 dmsp_16_ephemeris_20210617.txt 22-Jun-2023 16:35 109489 dmsp_17_ephemeris_20210617.txt 22-Jun-2023 16:35 109617 dmsp_18_ephemeris_20210617.txt 22-Jun-2023 16:35 109543