1. Askne, J. and E.R. Westwater, “A Review of Ground-Based Remote Sensing of Temperature and Moisture by Passive Microwave Radiometers,” IEEE Trans. Geoscience and Remote Sensing, Vol. G3-24, 340–352, (1986).
2. Backus, G. E. and J. F. Gilbert, “Uniqueness in the inversion of inaccurate gross earth data”, Phil. Trans. Roy. Soc. London, Ser. A 266, 123–192 (1970).
3. Basili, P. P. Ciotti and D. Solimini, “Inversion of ground-based radiometric data by Kalman filtering”, Radio Sci., 16, 83–91 (1981).
4. Brown, R. G. and P.Y. C. Hwang, Introduction to random signals and appliedKalman Filtering, J. Wiley & Sons, New York, (1997)
5. Chahine, M. T., “Inverse problems in radiative transfer: determination of atmospheric parameters”, J. Atmos. Sci., 27, 960–967 (1970).