This allowed it to send its signal and begin receiving the reply during the time when the main radar pulse was in-flight.
12.
A target's motion relative to the radar station causes a change in the reflected frequency of the radar pulse, due to the Doppler effect.
13.
Radar pulsing causes a phenomenon called aliasing, which occurs when the Doppler frequency created by reflector motion exceeds the pulse repetition frequency ( PRF ).
14.
The radar mile is the amount of time it takes for a radar pulse to travel one nautical mile, reflect off a target, and return to the radar antenna.
15.
"' Ionosphere "'- The ionosphere can also impose a delay on the radar return signal, where electron plasma in the ionosphere slow down the group velocity of the radar pulse.
16.
The temporal evolution of the reflected radar pulse is interpreted in order to estimate the distance between the radar altimeter and the reflecting surface; surface irregularities can also be estimated.
17.
Thus the volume of air that a radar pulse is traversing is larger for areas farther away from the station, and smaller for nearby areas, decreasing resolution at far distances.
18.
And in tests, Engel has found their 30 millimeter bullet gives out a 4 kilowatt radar pulse _ almost 10 times more power than a standard ground _ penetrating radar-from 20 centimeters down.
19.
So we can say that the sum of autocorrelation functions of complementary sequences is a delta function, which is an ideal autocorrelation for many applications like radar pulse compression and spread spectrum telecommunications.
20.
Infiniti says it sends " a radar pulse underneath the car just in front of you that locks onto the second vehicle " . talk ) 15 : 35, 6 April 2014 ( UTC)
