../ dmsp_15_ephemeris_20191021.txt 22-Jun-2023 16:31 109481 dmsp_16_ephemeris_20191021.txt 22-Jun-2023 16:31 109528 dmsp_17_ephemeris_20191021.txt 22-Jun-2023 16:31 109573 dmsp_18_ephemeris_20191021.txt 22-Jun-2023 16:31 109511