Since we are modelling a naturally occurring phenomena there are a huge number of input parameters to consider. The major one are listed below:
System parameters Radar Frequency: Measured in Ghz, this is the operating frequency of the radar, kept at 1.25 GHz Wavelength: Appropriate wavelength has to be selected in order for backscattering to occur, we utilize L band, C band and X band for this. Incident Angle: Backscattering is quite dependent on the incident angle of the wave.
Environment parameters: Canopy density: modelled as tree per square metre, for eg 0.5 in one of the simulation run Trunk height and diameter: Leaf density:modelled as leaves per cubic meter, for eg 48.46
Dielectric value of : Leaves Needles Branches Trunks Ground Surface
The output of the simulation is the value of backscattering coefficient for various values of angle of incidence for different wavelengths.
The
We have 4 different types of polarized output to consider, HH,VV, HV and VH.
An example : ollowing parameters are considered,
Canopy Density = 0.50 Trees per square meter, Crown Height = 2.12 meters, Trunk Height = 17.70 meters, Trunk Dielectric = 28.190 -j 7.830, Trunk Diameter = 14.200 cm Branch Diameter = 3.000 cm, Branch Length = 1.860 meters Needle Density = 0.4820E+03 needles per cubic meter, Needle Diameter = 0.100 cm, Needle Length = 13.001 cm