"RADAR" is an acronym for RAdio Detection And Ranging, which is a broadcast beam and receiver, used primarily to detect the objects (such as aircraft) which are at a distance that cannot be observed visually. It is one of the applications of microwaves. Radar is used along with advanced transponder technology in air traffic control. Smaller radar units have been used to measure the speed of cars and trucks on highways, using the Doppler effect (frequency shift for moving objects), although these have mostly been replaced with laser devices using the same principle.
Radar is based on the principle that the RF signal at a high frequency is reflected back by reflective objects, typically large objects made from metal, composites, or rubberized materials. The distance between the radar antenna and the target can be measured by the delay time (microseconds, millionths of a second) between the broadcast and detected return.
The reflected signal is known as a 'radio echo'. The time taken by the signal to travel one nautical mile is 6.18 micro seconds, so it requires 12.36 microseconds to reach and return from an object one nautical mile away. The formula to determine the distance of the object 'S' is S=T/12.34 where 'T' is the time taken for the transmission and reception of the signal.
---
Radar is an acronym for RAdio Detection and Ranging. It uses RF transmission (radio frequency) in the microwave band to detect and range any detectable target within its range. It is an "active sensor" which emits RF waves that bounce off a target and are detected when the wave is received back. The time delay between transmission and detection produces its range given that the RF wave propagates at a uniform speed.
Modern "stealth" aircraft use RF scattering, along with microwave-absorbing materials, to avoid detection by traditional radar. Some advanced planes have radar reflection signatures so low that they are less than those of small birds.
On navigation charts, you may find a feature marked on the chart as 'Radar conspicuous'. This means that the feature will show up clearly on radar and be identified as that part on the chart.This not so obvious as it sounds. Land shows up on ship's radars, but due to reflections, absorption of radar signals and refraction, it can not always be certain to positively identify a coastline by it's shape.Having something that stands out, because of it's shape and radar reflection, is useful for navigation purposes.
Radar was invented and first used during the second world war. It is still, very much in use today.It's original use was to detect, and thus prepare for, fighter aircraft and bombers.Ships and aircraft use radar for navigation and collision avoidance.Air traffic control use radar to keep track of aircraft and keep them safe.Weather stations use radar to detect rain clouds.Radar is also being used in, experimental, driverless cars.
A radar engineer works with radar. They have design, develop, install, and test a radar.
Radar range is the distance of the object from the radar. Radar bearing is the direction of the object in relation to the radar. As radar is primarily used for ranging, the range information may be more important than the bearing.
An FMCW radar may make use of Doppler, but it doesn't necessarily.
radar
Francis James Wylie has written: 'The use of radar at sea' -- subject(s): Radar in navigation 'Choosing & using ship's radar' -- subject(s): Radar in navigation
RADAR - Radio Detection and Ranging SONAR - Sound Navigation and Ranging
they are both used in navigation.
Different kinds of radar are
Radar. Satellite navigation.
Sonar uses sound waves to detect objects underwater, while radar uses radio waves to detect objects in the air or on the ground. Sonar is typically used in marine environments, while radar is commonly used in aviation and meteorology.
Air Force Speciality Code AFSC inertial navigation and radar systems specialist airborne computers, radar, navigational systems and instruments
On navigation charts, you may find a feature marked on the chart as 'Radar conspicuous'. This means that the feature will show up clearly on radar and be identified as that part on the chart.This not so obvious as it sounds. Land shows up on ship's radars, but due to reflections, absorption of radar signals and refraction, it can not always be certain to positively identify a coastline by it's shape.Having something that stands out, because of it's shape and radar reflection, is useful for navigation purposes.
The electronics engineering deals with navigation and control and for other purposes. Basically a radar is used for navigation it is used for aircraft and other flying object also navigation can be achieved by using satellite communication.
Relative motion radar is a type of radar system that detects and tracks moving objects by measuring their relative motion compared to the radar system itself. It is commonly used in military and civilian applications for surveillance, navigation, and collision avoidance. The radar calculates the velocity of targets by analyzing the Doppler shift in the reflected signal.
Radar waves are used for various purposes such as tracking the movement of objects (like aircraft and ships), detecting weather patterns, monitoring speed and distance, mapping terrain, and aiding in navigation for ships and aircraft. Radar is also used in military applications for surveillance and targeting.