../ dmsp_15_ephemeris_20190604.txt 22-Jun-2023 16:56 109451 dmsp_16_ephemeris_20190604.txt 22-Jun-2023 16:56 109500 dmsp_17_ephemeris_20190604.txt 22-Jun-2023 16:56 109633 dmsp_18_ephemeris_20190604.txt 22-Jun-2023 16:56 109607