../ dmsp_15_ephemeris_20210101.txt 22-Jun-2023 00:45 106509 dmsp_16_ephemeris_20210101.txt 22-Jun-2023 00:45 106504 dmsp_17_ephemeris_20210101.txt 22-Jun-2023 00:45 106480 dmsp_18_ephemeris_20210101.txt 22-Jun-2023 00:46 106476