Final answer:
The speed and angle of an aircraft in reference to a radar site determine its Doppler shift and range.
Step-by-step explanation:
The speed and angle of an aircraft in reference to a radar site determine its Doppler shift and range. The Doppler shift is the change in frequency of the radar waves reflected by the aircraft due to its motion. It can be used to calculate the speed of the aircraft relative to the radar site. The range is the distance between the radar site and the aircraft and can be determined using the time it takes for the radar waves to travel to the aircraft and back.