../ dmsp_15_ephemeris_20180722.txt 22-Jun-2023 00:37 109553 dmsp_16_ephemeris_20180722.txt 22-Jun-2023 00:37 109578 dmsp_17_ephemeris_20180722.txt 22-Jun-2023 00:37 109441 dmsp_18_ephemeris_20180722.txt 22-Jun-2023 00:37 109648