A genetic algorithm to simultaneously retrieve land surface roughness and soil wetness

Two key parameters to affect microwave backscattering from the land surface are the surface roughness and soil wetness. A novel genetic algorithm is d eveloped for multi-parameter retrieval of land surface roughness and soil w etness from angular backscattering observations. Parameters of wetness and roughness are encoded into genes. Genes are constituents of chromosomes, wh ich undergo optimal selection based on a natural evolutionary process in th e genetic algorithm. The theoretical model of a two-scale rough surface is employed for computation of the cost function. Results retrieved using this genetic algorithm are compared well with ground data measurements. This st udy presents an example of the genetic algorithm for application of multi-p arameter retrieval in remote sensing.