../ dmsp_15_ephemeris_20211114.txt 22-Jun-2023 00:49 109413 dmsp_16_ephemeris_20211114.txt 22-Jun-2023 00:49 109517 dmsp_17_ephemeris_20211114.txt 22-Jun-2023 00:49 109463 dmsp_18_ephemeris_20211114.txt 22-Jun-2023 00:49 109424