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block 1&2 > LP 7 Fundamentals Of Radar > Flashcards

LP 7 Fundamentals Of Radar Flashcards

1
Q

A radio detection device which provides information on range, azimuth, and or elevation of objects

A

Radar

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2
Q

What are the two types of radar systems

A

Primary radar, secondary radar

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3
Q

A radar system in which a minute portion of a radio pulse transmitted from a site is reflected by an object and then received back at the site for processing and display at an air traffic control facility

A

Primary radar

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4
Q

What radar system sends out a signal which is reflected by anything with mass ( echo principle)

A

Primary radar

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5
Q

What radar signal is a pulse of radio energy similar to an x-ray

A

Primary radar

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6
Q

Does primary radar require equipment in the aircraft?

A

No

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7
Q

What are the four major components of a primary radar system?

A

Transmitter, antenna, receiver, radar display.TARR

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8
Q

The area directly above the antenna is called what and is not included in the signal pattern

A

Blind zone

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9
Q

What features improve primary radar presentation

A

Movie target indicator (MTI)

polarization

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10
Q

And electronic device which will permit radar scope presentation only from targets which are in motion

A

Moving target indicator

MTI

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11
Q

Is a pattern produced on the radar scope by ground returns which may degrade other radar returns in affected area

A

Ground clutter GC

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12
Q

What generates a pulse of radio energy

A

The transmitter

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13
Q

What focuses and broadcast radio energy, then collects the reflected return

A

The antenna

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14
Q

What amplifies and converts the reflected energy into video

A

The receiver

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15
Q

What depicts the position and movement of objects that reflect radio energy

A

The radar display

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16
Q

What happens when an aircraft is moving directly toward or away from the radar antenna at a particular speed
MTI

A

Blind speed

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17
Q

What is the radar antenna configuration that determines the motion of the Radio energy as it is transmitted

A

Polarization

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18
Q

What are the two types of polarization

A

Linear, circular

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19
Q

The normal radar transmission that will cause an echo from anything that has mass

A

Linear polarization LP

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20
Q

An electromagnetic wave for which the electronic and or the magnetic field vector at a point describes a circle

A

Circular polarization CP

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21
Q

It reduces or eliminates echoes from precipitation

A

CP

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22
Q

Name the components of a primary radar system

A

Transmitter, antenna, receiver, radar display

Tarr

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23
Q

What are the most Prevailant phenomena which can adversely affect the presentation that a controller sees on a primary radar display

A 
Anomalous propagation AP, 
temperature inversion, 
False targets, 
electronic radar interference, 
radar jamming, 
target fades
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24
Q

Anomalous propagation is caused by

A

Density or moisture

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25
Q

Radar beams are bent in the direction of

A

Dry dense air

26
Q

What occurs when warmer air is trapped on top of cooler air?

A

Temperature inversion

27
Q

Targets that lack validity or authenticity often produced as a result of temperature inversion or anomalous propagation

A

False targets

28
Q

What are the two causes of electronic radar interference

A 
Cross channeling (same system), 
other radar systems operating on the same frequency
29
Q

The disruption of the radar display on radio reception by means of electronic or mechanical interference

A

Jamming

30
Q

What are the two types of radar Jamming

A

Passive and active jamming

31
Q

Appearance of clutter on the radar display achieve by dropping large amounts of shredded foil, chaff

A

Passive radar jamming

32
Q

Electronically disrupting the radar operating frequency which results in clutter pattern similar to radar interference

A

Active radar jamming

33
Q

Inherent feature of all radar systems

A

Target fades

34
Q

What type of polarization would be used to reduce areas of heavy precipitation from the radar display

A

Circular polarization

35
Q

Displays only objects in motion

A

MTI

36
Q

Requires no equipment in the aircraft

A

Primary radar

37
Q

Focuses, broadcast, and collects reflected radio energy

A

Antenna

38
Q

Depicts the position and movement of objects that reflect radio energy

A

Radar display

39
Q

Reduces or eliminates echoes from precipitation

A

Cp

40
Q

Normal radar transmission that will cause an echo from anything that has mass

A

Lp

41
Q

Radar indications of aircraft or objects that do not exist

A

False target

42
Q

Appearance of clutter on the radar display caused by moisture in the air bending the radar beem

A

Ap

43
Q

Occurs when warmer air is trapped on top of cooler air

A

Temperature inversion

44
Q

Appearance of clutter on the radar display that results from two radar systems operating on the similar frequency

A

Electronic radar interference

45
Q

Appearance of clutter on the radar display caused by dropping large amounts of chaff

A

Passive jamming

46
Q

Clutter pattern achieved by electronic disruption of the radar operating frequency

A

Active jamming

47
Q

Area directly above the antenna that is not included in the signal pattern

A

Blind zone

48
Q

Amplifies and converts reflected radio energy into video

A

Receiver

49
Q

ATCTBS

A

Air traffic control radar beacon system

50
Q

Name the components of a secondary radar system

A 
Interrogator
 antenna
 transponder
 decoder 
radar display

Triad

51
Q

Ground based transmitter that generates radio signal which are sent to the antenna for broadcast

A

Interrogator

52
Q

Broadcast radio signals covering the same azimuth as primary antenna

A

Secondary radar antenna

53
Q

Is located in the aircraft

A

Transponder

54
Q

Processes transponder replies and send them to the radar display

A

Decoder

55
Q

Depicts an electronic presentation of a radar derived information

A

Radar display

56
Q

What may cause false targets to appear on a secondary radar display

A

Transponder operating near obstruction

Ring around

57
Q

The transponder replies excessively resulting in an arc or circle of replies centered on the radar sight

A

Ring around

58
Q

Name three advantages of secondary radar

A

Less vulnerable to blind spots, provides a longer range then primary, responses are not degraded by weather or ground clutter

59
Q

Name three disadvantages of secondary radar

A

It only displays aircraft with transponders, does not provide weather information, return is affected by the aircraft orientation along it’s longitudinal axis

60
Q

What radar system has to have equipment to be picked up and which one doesn’t

A

Primary doesn’t have to have equipment, secondary has to have a transponder

61
Q

Electronically displayed map on the radar display that may depict data such as airports, heliports, runway…

A

Video map

62
Q

The study circular motion of an electronic been depicted on the radar display that updates target information and correlates with the rotation of the radar antenna

A

Radar sweep

block 1&2 (13 decks)

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