../ dmsp_15_ephemeris_20210415.txt 22-Jun-2023 00:46 109550 dmsp_16_ephemeris_20210415.txt 22-Jun-2023 00:46 109640 dmsp_17_ephemeris_20210415.txt 22-Jun-2023 00:46 109649 dmsp_18_ephemeris_20210415.txt 22-Jun-2023 00:46 109460