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
Eighth Microwave Water and Energy Balance Experiment (MicroWEX-8) Series of season-long experiments conducted at a 9-acre field in NC Florida. MicroWEX-8: growing season of sweet corn from June 16 through August 24, 2009 Soil moisture and temperature values were observed every 15 minutes at the depths of 2, 4, 8, 16, 32, 64, and 120cm. V- & H-pol. TB at C-band and H-pol. TB at L-band every 15 minutes. Intensive Observation Period (IOP) 3 days in August, 2009 A risk-reduction experiment for the NASA-THP project
Concurrent active and passive, along w/ Lidar observations
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
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
Restriction in the stem, leaf and ear location increases the double scattering and the attenuation due to veg. cover at hh-pol, but reduces the attention at vv-pol.
Rep. Rep. Early Mid Late Early Mid Late s0vv (dB) s0hh (dB) DoY (EST) 2009 DoY (EST) 2009
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.
MicroWEX-10 UF – L band Automated Scatterometer System UF-LASS
RF electronics and antenna: Roger DeRoo & Ruzbeh Akbar @ U. Michigan