5 Dobson M C, Ulaby F T. Active microwave soil moisture research. IEEE Trans Geosci Remote Sensing, 1996, 24: 23-36
[6]
6 Fung A K. Backscattering from a randomly rough dielectric surface. IEEE Trans Geosci Remote Sensing, 1992, 30: 356-369？？
[7]
7 Ulaby F T, Sarahandi K, Donald M K. Michigan microwave canopy scattering model. Int J Remote Sens, 1990, 11: 1223-1253？？
[8]
8 Wigneron J P, Calvet J C, Pellarin T. Retriving near-surface soil moisture from microwave radiometric observations: Current status and future plans. Remote Sens Environ, 2003, 85: 489-506？？
[9]
9 Ulaby F T, Allen C T, Eger G. Relating microwave backscattering coefficient to leaf area index. Remote Sens Environ, 1984, 14: 113-133？？
[10]
10 Paris J F. The effect of leaf size on the microwave backscattering by corn. Remote Sens Environ, 1986, 19: 81-95 ？？
[11]
11 Bindlish R, Thomas J S, Eric W, et al. Soil moisture estimates from TRMM Microwave Imager observations over the Southern United States. Remote Sens Environ, 2003, 85: 507-515？？
[12]
12 Senior T A, Sarabandi K, Ulaby F T. Measuring and modeling the backscatter cross section of a leaf. Radio Sci, 1987, 22: 1109-1116？？
[13]
13 Roger D R, Yang D. A semi-empirical backscattering model at L-band and C-band for a soybean canopy with soil moisture inversion. IEEE Trans Geosci Remote Sensing, 2001, 39: 864-872？？
[14]
14 Wu T D, Chen K S, Shi J C, et al. A transition model for the flection coefficient in surface scattering. IEEE Trans Geosci Remote Sensing, 2001, 39: 2040-2050 ？？
[15]
15 Wu T D, Chen K S. A reappraisal of the validity of the IEM model for backscattering from rough surface. IEEE Trans Geosci Remote Sensing, 2004, 42: 743-753？？
[16]
16 Li Q, Shi J C, Chen K S. A generalized power law spectrum and its applications to the backscattering of soil surfaces based on the integral equation model. IEEE Trans Geosci Remote Sensing, 2002, 40: 271-280？？
[17]
23 Price J C. On the information content of soil reflectance spectral. Remote Sens Environ, 1990, 33: 113-121？？
[18]
24 Walthall N, Li X W. A coupled vegetation-soil bidirectional reflectance model for a semiarid landscape. Remote Sens Environ, 2000, 74: 113-124？？
17 Bindlish R, Barros A P. Parameterization of vegetation backscatter in radar-based soil moisture estimation. Remote Sens Environ, 2001, 76: 130-137？？
[23]
18 Sun G, Ranson K J. A three-dimensional radar backscattering Model of forest canopies. IEEE Trans Geosci Remote Sensing, 1995, 33: 372-382？？
[24]
19 Bindlish R, Barros A P. Multi-frequency soil moisture inversion from SAR measurements using IEM. Remote Sens Environ, 2000, 71: 67-88？？
21 Jacquemoud S, Baret F, Andrieu B, et al. Extraction of vegetation biophysical parameters by inversion of the PROSPECT + SAIL Models on sugar beet canopy reflectance data application to TM and AVIRIS sensors. Remote Sens Environ, 1995, 52: 163-172？？
