../ dmsp_15_ephemeris_20180913.txt 22-Jun-2023 16:53 109704 dmsp_16_ephemeris_20180913.txt 22-Jun-2023 16:53 109623 dmsp_17_ephemeris_20180913.txt 22-Jun-2023 16:53 109601 dmsp_18_ephemeris_20180913.txt 22-Jun-2023 16:53 109568