What feature does a Doppler radar NOT provide?

Doppler radar is primarily designed to measure the frequency shift of waves in relation to the motion of the source or observer, which allows it to provide various critical features for aviation and meteorology. One of its key functionalities is the ability to calculate the ground speed of an aircraft. This is achieved through the analysis of the changes in the frequency of the radar waves reflected from the aircraft.

Additionally, Doppler radar is very effective in detecting wind speed and direction. This capability is particularly useful for weather forecasting and aviation safety, as it can provide real-time data on atmospheric conditions. Furthermore, the radar's ability to track both manned and unmanned aerial vehicles is vital for air traffic control and military applications, thereby helping in maintaining safety and monitoring airspace.

However, encrypting radar information is not a feature of Doppler radar. Encryption pertains to securing communications and data transmission rather than the fundamental functions of radar technology itself. Doppler radar systems focus on processing and analyzing radar signals for movement and speed detection rather than encoding or securing the output data. Thus, the absence of an encryption feature makes it distinct from the other capabilities associated with Doppler radar technology.