isodop.m

此程序给出了不同情况的雷达距离测量仿真平台

% PLOT OF CONSTANT DOPPLER CONTOURS - ISODOPS
% -------------------------------------------

clear;clc;clf;

% Set Aircraft Parameters

ro=.1;                % vg/vac ratio
h=10000;              % feet

% Calculate Doppler Contour

for i=1:9;
rr=ro+.1*(i-1);   
phi=acos(rr);     	% depression angle
a=tan(phi);
xmin=h/a+1e-3;
x=xmin:30000;
y1=sqrt(a^2*x.^2-h^2);
q=1:xmin;
Ay=zeros(size(q));
Ay1=[Ay y1];

% Plot Doppler Contour

Ax=xmin*ones(size(q));
x1=[Ax x];
plot(x1,Ay1,'k',x1,-Ay1,'k',-x1,Ay1,'k',-x1,-Ay1,'k');
grid;axis([-3e4 3e4 -5e4 5e4]);hold on;
end;hold off;
title('Constant Doppler Contours - Isodops');
xlabel('Ground Track Range - feet');
ylabel('Cross Track Range - feet');
text(2.5e4,.2e4,'Ground Track');