主程序：stripmapSAR.m
%%========================================================
clear;clc;close all;
%%========================================================
%%Parameter--constant 恒值参数
C=3e8; %propagation speed 光速
%%Parameter--radar characteristics 典型雷达参数
Fc=1e9; %carrier frequency 1GHz 载
波频率
lambda=C/Fc; %wavelength 波长
%%Parameter--target area 目标范围参数
Xmin=0; %target area in azimuth is
within[Xmin,Xmax]
Xmax=50;
Yc=10000; %center of imaged area
Y0=500; %target area in range is
within[Yc-Y0,Yc+Y0]
%imaged width 2*Y0
%%Parameter--orbital information 轨迹参数
V=100; %SAR velosity 100 m/s 平台速度
H=5000; %height 5000 m
R0=sqrt(Yc^2+H^2);
%%Parameter—antenna 天线参数
D=4; %antenna length in azimuth
direction
Lsar=lambda*R0/D; %SAR integration length
Tsar=Lsar/V; %SAR integration time
%%Parameter--slow-time domain 慢时间域参数
Ka=-2*V^2/lambda/R0; %doppler frequency modulation
rate
Ba=abs(Ka*Tsar); %doppler frequency modulation
bandwidth
PRF=Ba; %pulse repitition frequency 脉冲
频率
PRT=1/PRF; %pulse repitition time 脉冲周期
ds=PRT; %sample spacing in
slow-time domain 采样间距
Nslow=ceil((Xmax-Xmin+Lsar)/V/ds); %sample number in
slow-time domain 采样数目
Nslow=2^nextpow2(Nslow); %for fft
sn=linspace((Xmin-Lsar/2)/V,(Xmax+Lsar/2)/V,Nslow); %discrete time array in
slow-time domain 离散化
