../ dmsp_15_ephemeris_20210609.txt 22-Jun-2023 00:47 109553 dmsp_16_ephemeris_20210609.txt 22-Jun-2023 00:47 109547 dmsp_17_ephemeris_20210609.txt 22-Jun-2023 00:47 109662 dmsp_18_ephemeris_20210609.txt 22-Jun-2023 00:47 109411