../ dmsp_15_ephemeris_20211205.txt 22-Jun-2023 00:49 109418 dmsp_16_ephemeris_20211205.txt 22-Jun-2023 00:49 109332 dmsp_17_ephemeris_20211205.txt 22-Jun-2023 00:49 109248 dmsp_18_ephemeris_20211205.txt 22-Jun-2023 00:49 109315