Simple Mat lab Q ) I have a record of a radar that has two coulmns . The first o

Question

Simple Mat lab Q )

I have a record of a radar that has two coulmns . The first one and second shows the sending and reciving time respectively,* speed of light (300000000 m/s).

I generated a code to :

1)Plot the inst. distance between the radar and the airplane.

2)plot inst. speed of the object. (speed is the der. of distance)

3)time to reach to that radar (toward Radaar- straight line) (time=dist/speed)

my answer : (I think part 1 is ok ,but I have a problem with part two and three, I need help to complete this code please)

sendT=[Radar(:,1)]; %coloumn 1  

RecT=[Radar(:,2);]; %coloumn 2

Diff=RecT-sendT;

c=3e8; %speed of light

dist=Diff.*(c/2); % the distance

plot(sendT,dist);

title('Range')

xlabel('Rad.')

ylabel('Distance in meter')

%part2

figure();

speed=(c/2)*((conv(distance,[1 -1 ])-0.01)/0.01);

v=abs(speed);

plot(sendT(1:end-1),v(2:end-1));

% axis([0 0.4 0 100])

title('inst. speed')

ylabel('speed in(m/s)')

xlabel('Rad.')

%part three

Explanation / Answer

For part2:

To compute the speed by taking derivative of distance you can do the following :

You have dist array calculated in part1.

Compute difference between 2 adjacent elements of dist : dist_diff = diff(dist) where diff is inbuilt function in matlab

Also compute difference between adjacent elements in array sendT : sendT_diff = diff(sendT).

Now the respective elements of sendT_diff and dist_diff represents the time taken and distance traveled respectively.

Hence speed is element wise division of sendT_diff and dist_diff : speed = dist_diff ./ sendT_diff

Part 3 :

time = dist[2:end-1]./speed

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