Help Needed!!!
Hi All, need your help for following questions of Radio Aids (GSP), Doppler Radar Chapter, Page no. 167-168. Many thanks in advance.
Q3. An aircraft using a single beam Doppler system to measure its groundspeed is travelling at 300 m/s. Depression angle is 60 degrees. Transmission frequency is 10 GHz. What will be Doppler shift?
Ans. 10 KHz.
Q4. An aircraft uses a single beam Doppler system with depression angle 60 degrees to measure its ground speed. Transmission frequency is 10 GHz. What will the ground speed if the Doppler Shift is 5 KHz.
Ans. 300 kt.
Q7. An aircraft with a 4-beam Janus array has a depression angle of 60 degrees and an angle of 30 degrees horizontally between the beams and the aircraft longitudinal axis. What will be Doppler shift in the array if the transmission frequency is 11500 MHz and the ground speed is 600 kt.?
Ans. 20 KHz.