../ dmsp_15_ephemeris_20180616.txt 22-Jun-2023 16:28 109541 dmsp_16_ephemeris_20180616.txt 22-Jun-2023 16:28 109599 dmsp_17_ephemeris_20180616.txt 22-Jun-2023 16:28 109724 dmsp_18_ephemeris_20180616.txt 22-Jun-2023 16:28 109483