SEMANA 21/05 A 28/05

Question

Q1. A long pulse can have the same bandwidth (resolution) as a short pulse if the long pulse is modulated in:

Answer 1

a) Frequency or signal

Answer 2

b) Frequency or phase

Answer 3

c) Phase or signal

Answer 4

d) Signal or time

Answer 5

a) Integration of pulses: technique that combines the returns of several pulses instead of only 1

Answer 6

b) Adaptive threshold: the noise is estimated using noise-only samples and the threshold is replaced.

Answer 7

c) Frequency of the signal: The noise can be reduced by the spare time between signals.

Answer 8

d) Aand B are correct.

Answer 9

a) Distance and azimuth of targets.

Answer 10

b) Meteorological information.

Answer 11

c) A and B are correct

Answer 12

d) The temperature of the engine.

Answer 13

a) Distance, azimuth, altitude and velocity.

Answer 14

b) Identification of targets and emergency scenarios.

Answer 15

c) A and B are correct.

Answer 16

d) None of above

Answer 17

a) High accuracy

Answer 18

b) Autonomous system

Answer 19

c) Use of real wind instead of estimated wind.

Answer 20

d) All of above

Answer 21

a) Use to be inside aircrafts noise.

Answer 22

b) Is the combination of a secondary surveillance radar (SSR) and Aerodrome Surveillance Radar (ASR)

Answer 23

c) It is the cheapest kind of aircraft`s radar.

Answer 24

d) None of above

Answer 25

a) It is a result of the development of the sequential lobbing technique.

Answer 26

b) If the target is located off-bore sight, the receiver will receive an amplitude-modulated signal at the conscan frequency.

Answer 27

c) One of its disadvantages is that due to the potential foes a break lock of the radar can occur.

Answer 28

d) All of above are correct.

Answer 29

a) Conical scan.

Answer 30

b) Sequential lobing.

Answer 31

c) Monopulse.

Answer 32

d) None of above.

Answer 33

A. A long pulse can have the same bandwidth (resolution) as short pulse if the long pulse is modulated in frequency or phase.

Answer 34

B. A long pulse can have the same bandwidth (resolution) as short pulse if the long pulse is modulated just in frequency.

Answer 35

C. A long pulse can have the same bandwidth (resolution) as short pulse if the long pulse is modulated just in phase.

Answer 36

D. A long pulse can not have the same bandwidth (resolution) as short pulse if the long pulse is modulated in frequency or phase.

Answer 37

A. This technique use the return from 1 pulse instead of several pulses.

Answer 38

B. This technique combines the returns from several pulses instead of only 1.

Answer 39

C. In this technique the noise is estimated using noise-only samples and the threshold is replaced.

Answer 40

D. Is not a technique to improve the detection.

Answer 41

A. Integration of pulses

Answer 42

B. Adaptive threshold

Answer 43

C. A and B are true

Answer 44

D. A and B are false

Answer 45

A. It gives distance and azimuth of targets.

Answer 46

B. It does not need on board equipment.

Answer 47

C. It can give meteorological information.

Answer 48

D. All are true.

Answer 49

A. It gives distance, azimuth, altitude and velocity.

Answer 50

B. It gives identification of targets.

Answer 51

C. It uses interrogator (ground based) and transponder (airbone).

Answer 52

D. All are true.

Answer 53

A. Doppler lets you separate things that are moving from things that aren’t.

Answer 54

B. Doppler does not let you separate things that are moving from things that aren’t.

Answer 55

C. Doppler lets you know the temperature of the ground.

Answer 56

D. Doppler lets you know where is your house.

Answer 57

A. Range gating

Answer 58

B. Sequential lobing

Answer 59

C. Conical scan (Conscan)

Answer 60

D. Amplitude comparison monopulse

Answer 61

A. Range gating

Answer 62

B. Sequential lobing

Answer 63

C. Conical scan (Conscan)

Answer 64

D. Amplitude comparison monopulse

Answer 65

A. The radar data processor

Answer 66

B. The modulor task included in the transmitter

Answer 67

C. Synchroniser function integrated into the exciter and the RDP

Answer 68

D. Analogic Signal Modulator

Answer 69

A. It determines the instantaneous altitude of the aircraft above the terrain over the aircraft is flying.

Answer 70

B. It makes use of the frequency modulated ranging.

Answer 71

C. The transmitted signal consists of a rectangular wave modulation.

Answer 72

D. The transmitted signal consists of a triangular wave modulation.

Answer 73

A. Scans the terrain ahead of it and receives ground returns that are used for guidance.

Answer 74

B. Scans the terrain ahead of it and receives airborne returns that are used for guidance.

Answer 75

C. Scans the terrain under it and receives airborne returns that are used for guidance.

Answer 76

D. Scans the terrain under it and receives ground returns that are used for guidance.

Answer 77

A. Radiate in groups of 10

Answer 78

B. Radiate in groups of 5

Answer 79

C. Radiate in groups of 2

Answer 80

D. Radiate independently

Answer 81

A. Does not use electronic switching means to scan the beam

Answer 82

B. Use electronic switching means to scan the beam

Answer 83

C. Use phasing techniques embedded within the design of the antenna to form and shape the beam

Answer 84

D. Have lower scanning capabilities being less expensive than the ESA.

Answer 85

A. Electronically Scanned Array

Answer 86

B. Electronically Surveillance Array

Answer 87

C. Electronically System Array

Answer 88

D. Electronically Shifter Array

Answer 89

A. Its power.

Answer 90

B. Its efficiency, related with the gain of the antenna.

Answer 91

C. Its ability to resolve very closely espaced objects.

Answer 92

D. None of them.

Answer 93

A. Ground mapping

Answer 94

B. Spotlight Mode

Answer 95

C. Inverse SAR

Answer 96

D. Direct SAR

Answer 97

A. The lines cross at almost 90º. This represents the most accurate fix.

Answer 98

B. The lines cross at a much more acute angle. The result is a larger error ellipse.

Answer 99

C. There are two possible solutions. An ambiguity exists that can only be resolved by using a further station.

Answer 100

D. All above are corrects.

Answer 101

A. Long Range Navigation

Answer 102

B. Lost Range Navigation

Answer 103

C. Longitudinal Range Navigation System

Answer 104

D. Low Range Navigation

Answer 105

A. A pulsed system with at least 4 stations: 2 Master + 2 slaves

Answer 106

B. A pulsed system with at least 3 stations: 1 Master + slaves

Answer 107

C. A pulsed system with at least 3 stations: 2 Master + 1 slaves

Answer 108

D. A pulsed system with at least 2 stations: 1 Master + 1 slave

Answer 109

A. Means Group Repetition Interval and is unique for each LORAN chain

Answer 110

B. Means Ground Repetition Interval and is similar for each LORAN chain

Answer 111

C. Means Group Repetitive Interval Code and is unique for each LORAN chain

Answer 112

D. None of above.

Answer 113

A. Offers a cheap and accurate navigational means to anyone who possesses a suitable receiver.

Answer 114

B. Means global navigation satellite systems

Answer 115

C. A and B are corrects

Answer 116

D. None of above

Answer 117

A. B and C are corrects

Answer 118

B. Three segments: control segment, space segment and user segment.

Answer 119

C. The space segment includes the satellite constellation, presently around 25 satellites that forms the basis of the network.

Answer 120

D. The control segment includes the satellite constellation, presently around 25 satellites that forms the basis of the network.

Answer 121

A. L1 and L3 Navigation Signals

Answer 122

B. Only L1 Navigation Signals

Answer 123

C. L1 and L2 Navigation Signals

Answer 124

D. Only L3 Navigation Signals

Answer 125

A. Offset between UTC time and atomic clock at satellite

Answer 126

B. Offset between satellite and receptor clocks (tu)

Answer 127

C. Other: measurement from starting time

Answer 128

D. All above and for this reason a fourth satellite is needed.

Nächster

SEMANA 21/05 A 28/05

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