Question

Explain your responses in reasonable details. Very brief answers are not acceptable 1) Why does radar employ the technique called pulse delay ranging? (Spts) 2) Speed of light-3x10ms Round-Trip Time-20 μ Calculate Range to the target aircraft.(Spts) 3) to figure above. The measured frequency difference is 10,000 hertz and the transmitter (Spts) has been increasing at a rate of 10 hertz per microsecond. Calculate range. 2) Speed of light 3x108 m/s Round-Trip Time 20 us Calculate Range to the target aircraft. (5pts) TIME 3) . The measured frequency difference is 10,000 hertz and the transmitter g at a rate of 10 hertz per microsecond. Calculate range. Refer to figure above. frequency has been increasin measur (5pts)

Answer 1

2. We know that $Speed = \frac{Distance}{Time}$

Here given time is round trip time. So time taken for forward travel = $\frac{20\mu s}{2} = 10\mu s$

So range of target aircraft = Speed* Time = = 3 km

3. Final frequency - Initial Frequency = 10000 hertz.

The transmitter frequency is increasing at the rate of 10 hertz per micro seconds. So the time taken for round trip is

1000 micro seconds, since there are 1000 10's in 10000.

So round trip time = 1000 micro seconds. So time taken for forward travel $= \frac{1000\mu s}{2} = 500\mu s$

So range of target aircraft = Speed* Time