../ dmsp_15_ephemeris_20210710.txt 22-Jun-2023 00:47 109540 dmsp_16_ephemeris_20210710.txt 22-Jun-2023 00:47 109610 dmsp_17_ephemeris_20210710.txt 22-Jun-2023 00:47 109750 dmsp_18_ephemeris_20210710.txt 22-Jun-2023 00:47 109553