💥1 概述
本文研究了土-水混合物的介电常数与微波信号在不同频率（L&S）波段和入射角下对地面的穿透深度之间的功能关系。微波信号对地面的穿透深度取决于雷达脉冲的入射角和波长，也取决于土壤的土壤特性。
📚2 运行结果
🎉3 参考文献
[1]计科峰. SAR图像目标特征提取与分类方法研究[D].中国人民解放军国防科学技术大学,2003.
👨💻4 Matlab代码
主函数部分代码：
%% L-C band dobson et. al. & hallikainen et. al %figure 2 %% clc clear all close all %% Dobson et. al. c=3*10^8; w=0:0.01:.35; S=82; C=1; theta=00; e_real= 2.37+(-5.24+0.55*S+0.15*C).*w+(146.04-0.74*S-0.85*C)*w.^2; e_img= 0.06+(6.69+0.0367*S-0.0620*C).*w+(16.17-0.30*S+0.27*C)*w.^2; lambda=((3*10^8)/(1.4*10^9))*1000; % 1.4 GHz lambda in mm Dobson for i=1:36 delta_p(i)=(lambda*sqrt(e_real(i)))/(2*pi*e_img(i)); end delta_p=abs(delta_p); figure d_depth=delta_p*cosd(theta); plot(w*100,d_depth,'-*') xlabel('Volumetric Water Content (%)') ylabel('Depth of penetration [mm]') %text(15,500,'Dobson et. al. used \epsilon=a_0+(a_1+b_1S+c_1C)*w+(a_2+b_2S+c_2C)*w^2+(a_3+b_3S+c_3C)*w^3') %text(15,400,'Hallikainen et. al. used \epsilon=(a_0+a_1S+a_2C)+(b_0+b_1S+b_2C)*w+(c_1+c_2S+c_3C)*w^2') %% hallikainen et. al hold on lambda=((3*10^8)/(1.4*10^9))*1000; % approx. 1.4 GHz (lambda in m) e_real= (2.862-0.012*S+0.001*C)+(3.803+0.462*S-0.341*C).*w+(119.006-0.50*S-0.633*C)*w.^2; e_img= (0.356-0.003*S-0.008*C)+(5.507+0.044*S-0.002*C).*w+(17.753-0.313*S+0.206*C)*w.^2; %e_img=e_img+.079; for i=1:36 delta_p(i)=(lambda*sqrt(e_real(i)))/(2*pi*e_img(i)); end delta_p=abs(delta_p); j=sqrt(-1); e=abs(e_real+j*e_img); h_depth=delta_p*cosd(theta); plot(w*100,h_depth,'-o') xlabel('Volumetric Water Content in %(w)') ylabel('Depth of penetration [mm]') title('For S = 82% and C = 01% (Soil type: Sand) at Nadir') legend('Dobson et al. for L-Band (1.4 GHz)','Hallikainen et al. for L-Band (1.4 GHz)' )
