A Soil Moisture Map Generated from Satellite Data by Using Domains of Attraction in Neural Networks

A learning method using domains of attraction in three-layered neural networks is proposed. The method is a combination of output error minimization learning with maximization learning of domains of attraction in one-layered perceptrons. To simplify the structure of the network, a successive learning technique is employed for hidden units. Domains of attraction in the network is derived by restricting output conditions at the hidden layer for training input data. A three-layered neural network is determined by this method using a training set which consists of satellite observation data and soil moisture data surveyed in some places. The estimation of soil moisture at all places corresponding to satellite data is carried out based on the derived domains of attraction in the network. Keyword:learning method, domain of attraction, satellite data, soil moisture data