%?BPA?多點(diǎn)目標(biāo)?單站SAR
%parameters?from?table?6.1
clc;
clear?all;
close?all;

%parameters‘definition
%===================================
c=3e8;
j=sqrt（-1）;
pi=3.1416;

fc=5.3e9;
lamda=c/fc;
D=4;???%天線孔徑
Va=150;
Kr=20e12;
Tr=2.5e-6;
sq_ang=3.5/180*pi;

Br=Kr*Tr;
Frfactor=1.2;
Fr=Br*Frfactor;
Ba=0.886*2*Va*cos（sq_ang）/D;
Fafactor=12;
Fa=Ba*Fafactor;

R_near=2e4;??%成像區(qū)域的近邊界
R_far=R_near+1000;?%?成像區(qū)域的遠(yuǎn)邊界
%?R=（R_near+R_far）/2;
%Y_min=-50;
%Y_max=Y_min+100;

La_near=0.886*R_near*lamda/cos（sq_ang）^2/D;??%近端的合成孔徑長度
La_far=0.886*R_far*lamda/cos（sq_ang）^2/D;???%?遠(yuǎn)端的合成孔徑長度
Tc_near=R_near*tan（sq_ang）/Va;???%近端的光束時延
Tc_far=R_far*tan（sq_ang）/Va;????%遠(yuǎn)端的光束時延
fdc=28*Va*sin（sq_ang）/lamda;?%多普勒中心頻率

Y_min=Va*Tc_far;
Y_max=Y_min+100;

Rmin=sqrt（R_near^2+（Tc_near*Va+La_nea

?屬性????????????大小?????日期????時間???名稱
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?????文件???????4446??2011-10-24?20:44??BackProjection.m

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?????????????????4446????????????????????1