1. A coherent backscattering model for growing corn Alejandro Monsivais-Huertero(1) and Jasmeet Judge(2) (1)ESIME Ticoman, InstitutoPolitecnicoNacional, Mexico (2)Center for RemoteSensing, University of Florida, USA

3. Methodology

4. Results

6. Introduction 7/25/11 Soil moisture information Active satellite missions VSM IGARSS 2011. Vancouver, Canada.

7. Introduction 7/25/11 Dynamic vegetation IGARSS 2011. Vancouver, Canada.

8. 7/25/11 Introduction Monsivais-Huertero & Judge, 2011. Random generation, discrete representation Incoherent model (MIMICS) Coherent model (Born approximation) Vs IGARSS 2011. Vancouver, Canada.

9. Introduction 7/25/11 Monsivais-Huertero & Judge, 2011. Random generation, discrete representation Incoherent model (MIMICS) Coherent model (Born approximation) Vs IGARSS 2011. Vancouver, Canada.

11. Coherent model predicts higher sensitivity to soil moisture than MIMICS modelIGARSS 2011. Vancouver, Canada.

13. To understand the coherent effects due to rows and location of canonical elements7/25/11 IGARSS 2011. Vancouver, Canada.

14. Methodology 7/25/11 Leaf location Ear location Leaf location Leaf location Canonical elements Stems Cylinders Leaves Ellipsoids Ears Cylinders Rough surface Row space IGARSS 2011. Vancouver, Canada.

16. MicroWEX-8 contd. Radiometer Radar Lidar

17. MicroWEX-8 (Veg. description) Rep. Rep. Early Mid Late Early Mid Late Length (m) H (m) Density (plants/m2) Width (m) Biomass (kg/m2) DoY (EST) 2009 *Bongiovanni, T.,, et al. (2011). Field observations during the eighth microwavewater and energy balance experiment (MicroWEX-8), University ofFlorida, available at UF/IFAS EDIS website,http://edis.ifas.ufl.edu/ae476 DoY (EST) 2009

18. MicroWEX-8 (soil description) 7/25/11 Surface roughness measurements Near-surface soil moisture IGARSS 2011. Vancouver, Canada.

19. Results MIMICS model estimates the lowest s0vv among the three models and similar level for s0hh Both the modified generator and the random generator show similar trends at both co-pols. At VV-pol, the modified generator gives amplitudes 2 dB higher than the random generator all over the growing season, in contrast, at HH-pol, both generators provide similar amplitudes after the late season. Rep. Early Mid Late s0vv (dB) s0hh (dB) DoY (EST) 2009

21. At vv-pol: s0dir for both models has similar level, s0doub is 2 dB higher in the mod. generator, s0soil is 5 dB higher at the mod. generator.

22. At hh-pol, both s0dir and s0doub have similar level, in contrast, s0soil is 3 dB lower in mod. generator.Rep. Rep. Early Mid Late Early Mid Late s0vv (dB) s0hh (dB) DoY (EST) 2009 DoY (EST) 2009

24. Conclusions Inclusion of row structure and restriction of leaf and ear location produces higher double scattering up to 2 dB in VV-pol. Differences at VV-pol are more significant after mid season due to increments in the double scattering. Future work: Model evaluation with field observations 7/25/11 IGARSS 2011. Vancouver, Canada.

26. Controls and mechanics: UF