1. Introduction . Satellite remote sensing images significantly contribute to the study of the relevant phenomena and changes in the earth’s surface, such as agriculture or agronomy, geology, coast, oceanography, urban development, climate and the environment [ 1 , 2 , 3 , 4 , 5 , 6 ]. Due to the low cost [ 7 ], numerous CubeSats proposed by Stanford University [ 8 ] can compose a constellation to achieve global coverage and hotspots revisited. A growing number of technology ...