摘要: Retrieval techniques, applicable to problems where measurements have be blended, satisfy an equation that can approximated by a Fredholm integral of the first kind. A variety inversion been used in radiometric remote sensing temperature and moisture profiles, are outlined solve this focusing on wide supplementary information may addition radiance information. Techniques, such as regularization iterative methods, introduced because their simplicity explicit use initial guess.Methods based Backus-Gilbert Kalman approaches shown for diagnosis problems. Statistical techniques illustrated emphasizing priori constrain solution. Final remarks give current scenario subject.