../ dmsp_15_ephemeris_20190507.txt 22-Jun-2023 16:56 109523 dmsp_16_ephemeris_20190507.txt 22-Jun-2023 16:56 109523 dmsp_17_ephemeris_20190507.txt 22-Jun-2023 16:56 109789 dmsp_18_ephemeris_20190507.txt 22-Jun-2023 16:56 109598