Doppler radar numericals
Hey guy i need some help with few doppler radar questions.a detail explanation would be great
Q1.
When an aircraft is flying directly away from a transmitter, transmitting on a frequency of 15 GHz, a frequency shift of 6.0 KHz is measured. The speed of the aircraft is:
a. 120 kt
b. 222 ms-1
c. 300 kt
d. 222 kt(ans)
Q2.
An aeroplane is flying at 486 kt directly towards a beacon transmitting on a frequency of 12 GHz. The change in frequency observed will be:
a. 10 MHz
b. 6.25 Hz
c. 10 KHz (ans)
d. 6.25 Khz
Q3.
A receiver is moving directly towards a transmitter at 900kph. The transmission frequency is 6 GHz. Calculate the frequency shift in kHz caused by the relative motion between the transmitter and receiver.
Ans-5khz
Q4.
A stationary transmitter is operating on a wavelength of 3cm. A receiver moving directly away from the transmitter measures a Doppler shift of 6kHz. Calculate the speed of the receiver away from the transmitter in m/sec and knots.
Ans-180 ms-1, 350 kt
Q5.
An 8800MHz transmitter is moving directly away from a receiver at 291 kt. Calculate:
a. the speed of relative motion in m/sec
b. the frequency shift at the receiver in Khz
c. the frequency received in MHz
Ans-
a. 150 ms-1
b. 4.4 KHz
c. 8799.9956 MHz
Thanks for the help guys