../ dmsp_15_ephemeris_20190719.txt 22-Jun-2023 00:41 109553 dmsp_16_ephemeris_20190719.txt 22-Jun-2023 00:41 109553 dmsp_17_ephemeris_20190719.txt 22-Jun-2023 00:41 109623 dmsp_18_ephemeris_20190719.txt 22-Jun-2023 00:41 109569