Atc Chapter 8: Radar

Front 1

What does Radar mean?

Back 1

Radio Detection and Ranging

Front 2

Who was Heinruch Hertz?

Back 2

He basically created radar and showed that waves reflect by objects in 1888.

Front 3

Who was marconi?

Back 3

Credited for the radio invention in 1922.

Front 4

Who worked for the Naval Research Lab and conducted experiments with Radar? What system did they use?

Back 4

Leo Young and A. Hoyt Taylor. A continuous wave system and a receiver on the other side.

Front 5

Who worked on Radar prior to WW2?

Back 5

US, Germany and England.

Front 6

What was the name of Englands Radar?

Back 6

Chain Home to warn of German attacks.

Front 7

What are the 2 types of Radar?

Back 7

Continous Wave and Pulse Radar.

Front 8

Early Radars consisted of what?

Back 8

separate transmitters and receivers with individual antennas.

Front 9

Modern radars consist of four compnents which are?

Back 9

Transmitter, receiver, antennae and display/ radar scope.

Front 10

How does radar operate?

Back 10

By transmitting a high powered radio pulse and listening for its reflection.

Front 11

What does a Transmitter do?

Back 11

Creates the high power radio signal used to illuminate the target.

Front 12

The transmitters rate of transmission is known as?

Back 12

pulse repetition rate or pulse repetition frequency (PRF).1,000 pulses per second.

Front 13

What does the Antennae do?

Back 13

The antenna functions as both a transmitting and receiving device.
◦The antenna also gathers the faint echoes and directs them to the receiver via the waveguide

Front 14

Where does the waveguide termnate at?

Back 14

The Feedhorn

Front 15

What does the Receiver do?

Back 15

Listens for any returning echos.
the radar system measures the time difference between transmission and reception and uses this calculation to determine the object’s distance from the antenna.
◦The farther away a target is the fainter the echo.

Front 16

What does the Display scope do?

Back 16

It displays the targets also known as the Plan Positon indicator and the Main display monitor.

Front 17

An object illuminated by the radar signal will do what?

Back 17

reflect radar energy and show up as a blip on the screen.

Front 18

What is blocked out on the screen?

Back 18

Ground clutter

Front 19

Low intensity echoes are known as?

Back 19

History

Front 20

What is Receiver Gain used for?

Back 20

to amplify desired targets and reduce unwanted targets.
ATC Radar receivers have a fixed threshold

Front 21

Whats the Moving Target Indicator used for?

Back 21

MTI uses phase-filtering techniques to eliminate targets that are not moving.
◦Also reduces target strength.
◦MTI Gate: Can vary the range of processing

Front 22

Whats the Sensitivity Time Control used for?

Back 22

Basically controls the intensity of all targets

Front 23

Circular Polarization Control (CP) does what?

Back 23

Removes most unwanted precipitation returns.
◦Also reduces legitimate targets.

Front 24

Name 2 radar sytem control knobs?

Back 24

Range Select
◦Range Marks

Front 25

Precision Approach Radar (PAR) is?

Back 25

Used by DOD as a precision landing aid.
◦Slowly being phased out

Front 26

Airport Surveillance Radar (ASR) is?

Back 26

◦Short-range radar

Front 27

Air Route Surveillance Radar (ARSR) is?

Back 27

Long Term Range radar. 250nm+

Front 28

Air Route Surveillance Radar (ARSR) is?

Back 28

Used at Airports when surface visibility is bad.

Front 29

Primary Radar returns from?

Back 29

the reflected echo. The blip.

Front 30

Secondary radar returns from?

Back 30

The transponder.

Front 31

Air Traffic Control Beacon System is known as?

Back 31

Known as Secondary Radar.
Introduced in 1956.
Originally developed by the military to sort out bad guys from good guys.

Front 32

All IFF and Beacon systems use a what system?

Back 32

“challenge and response” system.

Front 33

Transponder codes use a what type numbering system?

Back 33

octoral from 0-7. Also its a 4 digit code selected by the pilot.

Front 34

How many transponder codes exist?

Back 34

4096

Front 35

What is the TPX-42

Back 35

Originally a military beacon decoder system.
◦Allowed the “Squawk Code” to be displayed next to the secondary radar target

Front 36

Non-discrete codes end in

Back 36

00 like 1200. All other codes are discrete.

Front 37

Give preference to the use of

Back 37

discrete codes.
The computer issues discrete codes.


Front 38

Squawk Standby is used for?

Back 38

Turns the beacon off but unit stays on.
◦Used to reduce clutter.
◦Used to identify an aircraft.

Front 39

computer radar sytems were introduced as?

Back 39

part of "Project Beacon"

Front 40

3 sytems that were developed were the?

Back 40

Flight Data Processing(FDP) assigned to ARTCCs
2.Radar Data Processing(RDP) for ARTCCs
3.Automated Radar Terminal System (ARTS)

Front 41

What is a target?

Back 41

symbol showing aircraft beacon or primary, usually a slash, dot, or x.

Front 42

What is a Position symbol?

Back 42

symbol over the target attached by a line to the data block.

Front 43

If position symbol falls more than one history behind the target, or there is no target symbol, don’t use?

Back 43

Mode C

Front 44

What is ARTS? How many are there?

Back 44

Automated Terminal Radar System. Provided Radar and Beacon tracking. 4 types

Front 45

What is Stars?

Back 45

Standard Terminal Automation Replacement System.joint FAA and DoD program to replace ARTS and other capacity-constrained, older technology systems at 172 FAA and up to 199 DoD terminal radar approach control facilities and associated towers.
44