../ dmsp_15_ephemeris_20211201.txt 22-Jun-2023 00:49 109398 dmsp_16_ephemeris_20211201.txt 22-Jun-2023 00:49 109372 dmsp_17_ephemeris_20211201.txt 22-Jun-2023 00:49 109338 dmsp_18_ephemeris_20211201.txt 22-Jun-2023 00:49 109316