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Radio Navigation

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Quiz sobre Radio Navigation, criado por Jesús Nieto Domínguez em 27-11-2017.
Jesús Nieto Domínguez
Quiz por Jesús Nieto Domínguez, atualizado more than 1 year ago
Jesús Nieto Domínguez
Criado por Jesús Nieto Domínguez mais de 6 anos atrás
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Resumo de Recurso

Questão 1

Questão
Wavelength is the distance from:
Responda
  • wave crest to the next trough.
  • wave crest to wave crest.
  • trough to the next wave crest.
  • the E to the H field superimposed onto the system reactance background scatter.

Questão 2

Questão
The emission characteristics A3E describe:
Responda
  • ILS.
  • VHF communications.
  • HF communications.
  • VOR.

Questão 3

Questão
Electromagnetic waves travel at:
Responda
  • 300 000 metres per second.
  • the speed of sound.
  • the speed of light.
  • 162 000 miles per hour.

Questão 4

Questão
In radio terms, frequency means:
Responda
  • the speed of radio waves in metres per second.
  • the length of a complete waveform in metres.
  • the number of complete waveforms passing a spot in one second.
  • the number of waveforms in one hour.

Questão 5

Questão
According to ICAO Annex 10, in which frequency band(s) does a locator normally transmit?
Responda
  • HFI/VHF
  • MF/HF
  • HF
  • LF/MF

Questão 6

Questão
The Automatic Direction Finder uses the following wavelengths:
Responda
  • decimetric.
  • metric.
  • hectometric or kilo metric.
  • centimetric.

Questão 7

Questão
The Microwave Landing System (MLS) uses the following wavelengths:
Responda
  • myriametric
  • metric
  • hectometric
  • centimetric

Questão 8

Questão
Into what range does the ILS wavelength fall?
Responda
  • Kilometric
  • Metric
  • Nanometric
  • Millimetric

Questão 9

Questão
What is the frequency band for ADF?
Responda
  • Hectometric
  • Metric
  • Centimetric
  • Decimetric

Questão 10

Questão
A transmission of RF energy at a wavelength of 18 metres is in which frequency band?
Responda
  • MF
  • LF
  • HF
  • VHF

Questão 11

Questão
The Instrument Landing System (ILS) uses the following wavelengths:
Responda
  • metric
  • hectometric
  • decimetric
  • centimetric

Questão 12

Questão
The VHF direction finder uses the following wavelengths:
Responda
  • decimetric
  • hectometric
  • metric
  • centimetric

Questão 13

Questão
The Distance Measuring Equipment (DME) uses the following wavelengths:
Responda
  • decimetric
  • hectometric
  • metric
  • centimetric

Questão 14

Questão
The VHF omnirange (VOR) uses the following wavelengths:
Responda
  • centimetric
  • hectometric
  • decimetric
  • metric

Questão 15

Questão
What is the wavelength of an ILS signal?
Responda
  • Centimetric
  • Hectometric
  • Metric
  • Decimetric

Questão 16

Questão
A radio facility transmits on a wavelength of 2,22 cm. The facility could be a ___ operating on a frequency of __ •
Responda
  • VDF; 135 MHz
  • DME; 1350 MHz
  • doppler; 13500 MHz
  • radio altimeter; 13500 kHz

Questão 17

Questão
Frequency is defined as the:
Responda
  • number of complete cycles recurring in one unit of time.
  • distance between a crest and a crest.
  • number of complete cycles recurring in ten units of time.
  • distance from the axis to the peak value.

Questão 18

Questão
What is the wavelength of a VOR?
Responda
  • Metric
  • Decimetric
  • Heximetric
  • Centimetric

Questão 19

Questão
A radio transmitter modulator:
Responda
  • superimposes an audio frequency signal (AF) onto a radio frequency signal (RF).
  • couples the RF signal to an aerial.
  • tunesthe'aeria I-onl
  • ensures receiver compatibility.

Questão 20

Questão
The Marker beacons use the following wavelengths:
Responda
  • metric
  • centimetric
  • hectometric
  • myriametric

Questão 21

Questão
The secondary Surveillance Radar (SSR) uses the following wavelengths:
Responda
  • myriametric
  • centimetric
  • hectometric
  • decimetric

Questão 22

Questão
The Low Altitude Radio Altimeter uses the following wavelengths:
Responda
  • myriametric
  • centimetric
  • decimetric
  • metric

Questão 23

Questão
Selcal is an equipment that:
Responda
  • is coupled with TeAS II and is to do with TA warning systems.
  • automatically transmits data signals
  • automatically receives incoming signals.
  • functions as a frequency modulator.

Questão 24

Questão
What is the wavelength corresponding to a frequency of 375 kHz:
Responda
  • 8m
  • 80m
  • 800m
  • 8000m

Questão 25

Questão
The wavelength of a radio signal transmitted at the frequency of75 MHz is:
Responda
  • 4m
  • 40m
  • 7,5 m
  • 75m

Questão 26

Questão
A wavelength of 8,5 m~ corresponds to a frequency of:
Responda
  • 2 833,3 MHz
  • 35294MHz
  • 3529,4MHz
  • 28333 MHz

Questão 27

Questão
The VHF frequency band is in the:
Responda
  • 3 to 30 kHz range.
  • 30 to 300 kHz range.
  • 3 to 30 MHz range.
  • 30 to 300 MHz range.

Questão 28

Questão
Assuming a wavelength of 1 cm, frequency will be:
Responda
  • 30MHz
  • 30GHz
  • 3,OGHz
  • 0,3 GHz

Questão 29

Questão
The limits of the VHF band are:
Responda
  • 300 - 3000 MHz.
  • 30 - 300 MHz.
  • 300 - 3000 kHz.
  • 3-30 MHz.

Questão 30

Questão
Decimetric waves correspond to the frequency range:
Responda
  • 3 000 to 30 000 MHz.
  • 3 000 to 30 000 kHz.
  • 300 to 3 000 MHz.
  • 300 to 3 000 kHz.

Questão 31

Questão
The wavelength of a radio signal transmitted at the frequency 118,7 MHz is:
Responda
  • 2,53 m
  • 25,3 m
  • 2,53 cm
  • 25,3 cm

Questão 32

Questão
The wavelength of a radio signal with a frequency of 121.95 MHz is:
Responda
  • 24,60m
  • 24,60 cm
  • 2,46 cm
  • 2,46 m

Questão 33

Questão
The frequency which corresponds to a wavelength of 12 cm is:
Responda
  • 2500 kHz
  • 2500 MHz
  • 360MHz
  • 3600 MHz

Questão 34

Questão
A half wave dipole aerial suitable for transmitting an RF signal at 18 MHz should have an effective length of:
Responda
  • 16,67 metres.
  • 166,67 metres.
  • 83,33 metres.
  • 8,33 metres.

Questão 35

Questão
Assuming a frequency of 20 MHz, wavelength will be:
Responda
  • 1,5 m
  • 15m
  • 150m
  • 0,15 m

Questão 36

Questão
What is the wavelength of an NOB transmitting on 375 kHz?
Responda
  • 1,25 m
  • 12,5 m
  • 800m
  • 80m

Questão 37

Questão
A frequency of 2.400 kHz is equivalent to a wavelength of:
Responda
  • 125 m
  • 105 m
  • 0,80em
  • 8m

Questão 38

Questão
The wavelength of a non-directional beacon (NOB) at a frequency of 300 kHz is:
Responda
  • 1000 metres
  • 100 metres
  • 10 metres
  • 1 metre

Questão 39

Questão
The wavelength of a radio signal is 200 metres. What is its frequency?
Responda
  • 1,5 kHz
  • 1,5GHz
  • 1,5MHz
  • 15 MHz

Questão 40

Questão
A radio signal has a frequency of 3 GHz. Its wave length is:
Responda
  • 100 cm
  • 1,O cm
  • 10 cm
  • 1,O m

Questão 41

Questão
The VHF frequency band has a wavelength limit of:
Responda
  • 100 m to 10m.
  • 1 m to 100c m.
  • 10 m to 1 m.
  • 100 cm to 10 em.

Questão 42

Questão
The gain of an aerial is a measure of its ability to:
Responda
  • focus power.
  • transmit intelligence.
  • overcome transmitter line resistance.
  • compensate for attenuation.

Questão 43

Questão
Which of the following statements is correct in respect of a RF signal:
Responda
  • the plane of polarisation is dictated by the oscillator unit in the transmitter.
  • the electrical component of the signal is parallel to the aerial.
  • the magnetic component of the signal is parallel to the aerial.
  • both the electrical and magnetic components are parra lei to the aerial.

Questão 44

Questão
A radio wave with a horizontal magnetic component would be best received by a ___ aerial.
Responda
  • magnetic
  • parabolic
  • horizontal
  • vertical

Questão 45

Questão
A horizontally polarized electromagnetic wave:
Responda
  • has the H field horizontal.
  • has the Z field horizontal.
  • has the E field vertical.
  • has the E field horizontal.

Questão 46

Questão
Feeder lines are of the following types:
Responda
  • Co-axial- up to 3000 MHz; wave guides - above 3000 MHz
  • Co-axial- above 3000 MHz; wave guides - up to 3000 MHz
  • Co-axial- up to 300 kHz; wave guides - above 300 kHz
  • Wave guides - up to 20 MHz; co-axial above 30 MHz

Questão 47

Questão
An electromagnetic wave has two types of energy field:
Responda
  • an H electrical field and an E magnetic field.
  • a Z electrical field and an H magnetic field.
  • an E electrical field and an H magnetic field.
  • an Z magnetic field and an E electrical field.

Questão 48

Questão
Comparing a parabolic reflector with a flat plate antenna of the same size
Responda
  • the parabolic reflector has a considerably smaller beam width.
  • the parabolic reflector generates less side lobes than the flat plate antenna.
  • the flat plate antenna generates less side lobes than the parabolic reflector.
  • the flat plate antenna has a considerably smaller beam width.

Questão 49

Questão
What causes the so-called night effect?
Responda
  • A change in the direction of the plane of polarisation due to reflection in the ionosphere.
  • The absence of the surface wave at distances larger than the skip distance.
  • Interference between the ground and the space wave.
  • The difference in velocity of the EM-waves over land and over sea, at night.

Questão 50

Questão
A Doppler shift will occur:
Responda
  • if a transmitter is moving during transmission to a fixed position receiver.
  • when the distance between a transmitter and a receiver is changing during a transmission.
  • if a receiver is moving during reception of transmission from a fixed position transmitter.
  • all answers are correct.

Questão 51

Questão
When a transmitter is moving towards a receiver, the correct description of Doppler effect is:
Responda
  • there is a decrease in apparent wavelength which is dependent on the transmitter velocity.
  • there is a decrease in apparent wavelength which is independent of the transmitter velocity.
  • there is a increase in apparent wavelength which is dependent on the transmitter velocity.
  • there is a increase in apparent wavelength which is independent of the transmitter velocity.

Questão 52

Questão
An apparent increase in the transmitted frequency which is proportional to the transmitter velocity will occur when:
Responda
  • the transmitter moves away from the receiver.
  • the transmitter moves towards the receiver.
  • the receiver moves towards the transmitter.
  • both transmitter and receiver move towards each other.

Questão 53

Questão
Due to Doppler effect an apparent decrease in the transmitted frequency, which is proportional to the transmitters velocity, will occur when:
Responda
  • the transmitter and receiver move towards each other.
  • the transmitter moves away from the receiver.
  • the transmitter moves toward the reciever.
  • both transmitter and receiver move away from each other.

Questão 54

Questão
Refraction of an electro-magnetic radiation is:
Responda
  • the bending of its propagation path as it passes through or over areas of different electrical conductivity.
  • the loss of power as it passes through or over areas of different electrical conductivity.
  • bending resultant from reflection from objects.
  • loss of power through reflection from objects.

Questão 55

Questão
Which statement is true?
Responda
  • The attenuation of an HF ground wave is worse over the land than over ice.
  • The ionosphere will attenuate and refract signals up to 30 GHz.
  • The lower the frequency the greater the ionospheric attenuation.
  • None of the above.

Questão 56

Questão
The term Doppler shift refers to:
Responda
  • the change in depression angle measured at the receiver.
  • the change in the speed measured at the receiver.
  • the change in phase angle measured at the receiver.
  • the change in frequency measured at the receiver.

Questão 57

Questão
Attenuation of radio waves means:
Responda
  • the weakening of the radiated waves.
  • the atmospheric bending of the waves.
  • only the scattering of the waves by the tropopause.
  • only the absorption of radio energy by the sea.

Questão 58

Questão
When an LF radio wave passes over the earth's surface it:
Responda
  • speeds up, picks up electrons and becomes stronger.
  • slows down and is attenuated.
  • speeds up and is attenuated.
  • slows down, picks up electrons and becomes stronger.

Questão 59

Questão
To establish and maintain effective HF communications the frequency used at a given range:
Responda
  • should remain constant.
  • should be increased at night.
  • should be decreased at night.
  • should only be varied by season, decreased in summer and increased in winter.

Questão 60

Questão
Skip distance is the:
Responda
  • highest critical frequency distance.
  • range from the transmitter to the first sky wave.
  • wavelength distance of a certain frequency.
  • thickness of the ionosphere.

Questão 61

Questão
Diffraction of a RF signal is a displacement of its propagation path dueto:
Responda
  • reflection from the surface.
  • passing over or though mediums of different conductivity.
  • passing over obstacles with dimensions close to the wavelength.
  • passing through ionised regions of the upper atmosphere.

Questão 62

Questão
Using a medium frequency band when is fading likely to occur?
Responda
  • Day time and snowing.
  • Night time and snowing.
  • Day with sky and ground waves.
  • Night with sky and ground waves.

Questão 63

Questão
Complete the following statement: ___ radio signals have a __ range by ___ wave over __ than over __ •
Responda
  • MF; shorter; sky; sea; land
  • MF; greater; groLind; sea; land
  • VHF; shorter; sky; sea; land
  • MF; greater; ground; land; sea

Questão 64

Questão
The frequency at which sky waves should least affect reception?
Responda
  • HF
  • MF
  • LF
  • VLF

Questão 65

Questão
The skip distance of HF-transmission will increase with:
Responda
  • higher frequency and higher position of the reflecting ionospheric layer.
  • lower frequency and higher position of the reflecting ionospheric layer.
  • higher frequency and lower position of the reflecting ionospheric layer.
  • lower frequency and lower position of the reflecting ionospheric layer.

Questão 66

Questão
Attenuation is a generic term for:
Responda
  • increase in power.
  • loss of power.
  • refraction.
  • loss of power but is only relevant to space waves.

Questão 67

Questão
Reflection from ionospheric layers is used in the following radio frequencies:
Responda
  • VHF
  • HF
  • UHF
  • VLF

Questão 68

Questão
MF fading is most common:
Responda
  • during the day due to the reception of both sky waves and ground waves.
  • during the day and during heavy rain.
  • at night and during heavy rain.
  • at night due to the reception of both sky waves and ground waves.

Questão 69

Questão
As the frequency of a transmitter is increased, the range of the ground wave will:
Responda
  • increase.
  • decrease.
  • decrease only at night.
  • increase only over the sea.

Questão 70

Questão
Skip distance is longest by __ and with a __ frequency.
Responda
  • day;low
  • day; high
  • -night; low
  • night; high

Questão 71

Questão
Attenuation of a radio wave is the:
Responda
  • increase of its power by the combination of mUlti-path signals.
  • change of its frequency QY use of sidebands.
  • change of its amplitude by use of sidebands.
  • reduction of its power by absorption, scattering or spreading.

Questão 72

Questão
A radio signal looses strength as the range from the transmitter increases. This effect is called:
Responda
  • refraction
  • attenuation
  • amplification
  • ducting

Questão 73

Questão
In the propagation of MF waves, the phenomenon of FADING is particularly found:
Responda
  • by day, due to the combination of sky and ground waves.
  • at night due to the combination of the sky and ground waves.
  • at night and when raining.
  • by day and when raining.

Questão 74

Questão
Fading happens:
Responda
  • in daytime when ground-waves and sky-waves interfere with each other.
  • at night when the signal is received by ground-waves only.
  • at daytime when the signal is received by sky-waves only.
  • at night when ground-waves and sky-waves interfere with each other.

Questão 75

Questão
Which of the following statements is true?
Responda
  • A broad bandwidth gives a narrow beam width.
  • A narrow bandwidth improves beam width.
  • A transmissions bandwidth is affected by the design of the aerial.
  • Bandwidth must be reduced in order to reduce noise.

Questão 76

Questão
Diffraction is the process by which:
Responda
  • a space wave penetrates the ionosphere.
  • a ground wave is attenuated over rough ground
  • radio wave travel over and around obstacles.
  • a direct wave is bent around the form of the Earth.

Questão 77

Questão
An HF transmitter is tuned to a frequency that refracts from the E layer in the Ionosphere. The maximum distance of the first returning skywave is:
Responda
  • 599 NM
  • 599 km
  • 1500 NM
  • 1500 km

Questão 78

Questão
What is the lowest frequency where freedom from static interference can be guaranteed?
Responda
  • 3MHz
  • 30MHz
  • 300MHz
  • 3 GHz

Questão 79

Questão
An aircraft travelling at 330 metres a second transmits a signal at 10 GHz to a stationary receiver. If the aircraft is flying directly towards the receiver and they are approximately at the same height the received frequency will be:
Responda
  • 11 MHz
  • 10,000011 GHz
  • 9,999989 GHz
  • 11 GHz

Questão 80

Questão
The approximate ground waves of LF and MF are (by day) __ and __ respectively, with __ suffering more from atmospheric attenuation.
Responda
  • 1500 NM; 1000 NM; MF
  • 1000 NM; 500 NM; LF
  • 1000 NM; 300 NM; MF
  • 500 NM; 100 NM; LF

Questão 81

Questão
The VDF class B bearing is accurate to within:
Responda
  • ± 1°
  • ±2°
  • ±3°
  • ±5°

Questão 82

Questão
When would VDF be used for a position fix:
Responda
  • when an aircraft declares an emergency on any frequency.
  • when first talking to a FIR on crossing an international boundary.
  • when joining controlled airspace from uncontrolled airspace.
  • when declaring an emergency on 121,5 MHz.

Questão 83

Questão
In which one of the following circumstances is ground direction finding (VDF) likely to be used to fix an aircraft's position?
Responda
  • When contacting ATe to join controlled airspace from the open FIR.
  • When declaring an emergency on any frequency.
  • When using the emergency VHF frequency 121,5 MHz.
  • On first contact with ATC on crossing an international FIR boundary.

Questão 84

Questão
What airborne equipment, if any, is required to be fitted in order that a VDF let-down may be flown?
Responda
  • None.
  • VOR.
  • VHF radio.
  • VOR/DME.

Questão 85

Questão
What equipment does an aircraft need when carrying out a VDF letdown:
Responda
  • VHF radio.
  • VOR.
  • VOR/DME.
  • none.

Questão 86

Questão
The minimum airborne equipment required for operation of a VHF direction finder is a:
Responda
  • VHF compass operating in the 200 kHz to 1.750 kHz range.
  • VHF transmitter-receiver operating in the 118 MHz to 136 MHz range.
  • VHF receiver operating in the 118 MHz to 136 MHz range.
  • cathode-ray tube.

Questão 87

Questão
Ground direction finding at aerodromes utilises which frequencies?
Responda
  • VHF at civil aerodromes and VHF at military aerodromes.
  • UHF at civil aerodromes and UHF at military aerodromes.
  • VHF at civil aerodromes and UHF at military aerodromes.
  • UHF at civil aerodromes and VHF at military aerodromes.

Questão 88

Questão
The range at which you can obtain a VDF bearing can be influenced by:
Responda
  • time of day.
  • type of surface.
  • height of aircraft.
  • intensity of ionisation.

Questão 89

Questão
An aircraft wishing to use the VDF service must:
Responda
  • be equipped with a VOR indicator unit.
  • transmit a signal for a long enough period for the bearing to be established.
  • ask the controller to transmit for a long enough period to establish the bearing
  • be within 10 NM of the VDF aerial.

Questão 90

Questão
What is the role of a ground direction finder?
Responda
  • To aid pilot navigation .
  • To aid ground movements.
  • To map airfields.
  • To assist planners in the construction of airfield approaches .

Questão 91

Questão
If, when you are requesting a QDM from an airfield, you are offered a QGH, it means:
Responda
  • the bearing will only be accurate when the aircraft is flying above the QGH level.
  • the VDF service will be handled by a different VDF unit, operating on the same frequency.
  • the VDF unit is prepared to give you assistance during an approach to the airfield, based on VDF bearings.
  • the service will be limited to bearings, no positions will be given by the DF station.

Questão 92

Questão
In VDF service the report "QDR235, Class C" means:
Responda
  • the magnetic bearing from the aircraft to the station is 235°±10°.
  • the true bearing from the aircraft to the station is 235°±1 0°.
  • the magnetic bearing from the station to the aircraft is 235 ±15°.
  • the magnetic bearing from the station to the aircraft is 235°±10°.

Questão 93

Questão
When conducting a QGH approach responsibility for interpreting the procedure rests with __ and on a QDM approach responsibility rests with ___ •
Responda
  • the controller; the controller
  • the pilot; the pilot
  • the pilot; the controller
  • the controller; the pilot

Questão 94

Questão
Which of the following affects VDF range?
Responda
  • Coastal refraction.
  • The height of the transmitter and of the receiver.
  • Sky wave propagation.
  • Strength of the pilot's voice when transmitting.

Questão 95

Questão
Abnormal long ranges may be experienced on VDF channels, caused by:
Responda
  • efficient VDF antennas.
  • super refraction of signals in the atmosphere.
  • the VDF station using a relay station for communication to the aircraft.
  • intermodulation with signals on frequencies close to the one used by the VDF station.

Questão 96

Questão
You intercept a QDM with a right crosswind component. Is your intercept heading greater or smaller then without wind influence?
Responda
  • Greater.
  • Smaller.
  • Remains the same.
  • Not enough information to give an answer.

Questão 97

Questão
If a ground DfF controller passes a bearing thus: "your true bearing is 256°, class alpha." This means:
Responda
  • QTE accurate to ± 5°.
  • QUJ accurate to ± 3°.
  • QOR accurate to ± 2°.
  • QTE accurate to ± 2°.

Questão 98

Questão
With reference to a VDF bearing, the true bearing of the aircraft from the ground station is a:
Responda
  • QTE
  • QUJ
  • QOR
  • QOM

Questão 99

Questão
Which Q code would give a magnetic bearing from a VDF station:
Responda
  • QOM
  • QOR
  • QUJ
  • QTE

Questão 100

Questão
Which Q code would give a magnetic heading to steer (nil wind) to a VDF station:
Responda
  • QDM
  • QDR
  • QUJ
  • QTE

Questão 101

Questão
Which Q code would give a true track from a VDF station:
Responda
  • QOM
  • QOR
  • QUJ
  • QTE

Questão 102

Questão
A VDF bearing can be obtained:
Responda
  • only on a frequency of 121,5 MHz.
  • on the Approach frequency
  • on the frequency notified for VOF services.
  • on the frequency agreed between the pilot and ATC but chosen from one of the available ATC frequencies.

Questão 103

Questão
An aeroplane requesting a VDF bearing should:
Responda
  • avoid banking during transmission.
  • not pass overhead VOF aerial.
  • ensure that radio silence is maintained.
  • transmit on 121,5 MHz.

Questão 104

Questão
Which of the following is an advantage of VDF?
Responda
  • No equipment required in the aircraft.
  • No special equipment required in the aircraft or onthe ground.
  • Only a VHF radio is needed in the aircraft.
  • It is pilot interpreted, so ATC is not required.

Questão 105

Questão
WhatisQTE?
Responda
  • Magnetic track from the station.
  • Magnetic track to the station.
  • True track from station.
  • True track to the station.

Questão 106

Questão
Which of the following is an advantage of GroundlDF (VDF) let-down?
Responda
  • It is pilot interpreted and does not require the assistance ofATC.
  • It only requires a VHF radio to be fitted to the aircraft.
  • It does not require any special equipment to be fitted to the aircraft.
  • It does not require any special equipment, apart from a VHF radio, to be installed in the aircraft or on the ground.

Questão 107

Questão
Which of the following statements regarding VHF direction finding (VDF) is most accurate?
Responda
  • It is simple and only requires a VHF radio on the ground.
  • It is simple and requires a VHF radio and OF equipment in the aircraft.
  • It is simple requiring only VHF radios on the ground and in the aircraft.
  • It uses line of sight propagation.

Questão 108

Questão
In the VDF system directional antennas are used:
Responda
  • in the aircraft.
  • in the aircraft and at the ground installation.
  • at the ground installation.
  • no directional antennas are used.

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