../ dmsp_15_ephemeris_20211220.txt 22-Jun-2023 00:49 109393 dmsp_16_ephemeris_20211220.txt 22-Jun-2023 00:49 109369 dmsp_17_ephemeris_20211220.txt 22-Jun-2023 00:49 109363 dmsp_18_ephemeris_20211220.txt 22-Jun-2023 00:49 109394