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2-8 MIDTERMS 2ND SEM > COMNAV MIDTERMS > Flashcards

COMNAV MIDTERMS Flashcards

1
Q

parts of wavelength

A

crest, trough, period, amplitude, wavelength, frequency

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2
Q

highest point of wave

A

crest

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3
Q

lowest point of wave

A

trough

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4
Q

power of wave / highest point to period

A

amplitude

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5
Q

where wave travels

A

period

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6
Q

distance from crest to another crest

A

wavelength

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7
Q

number of oscillations per second

A

frequency

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8
Q

describes all of the kinds of light including those the human eye cannot see

A

electromagnetic spectrum

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9
Q

types of light

A

radio waves, microwaves, infrared radiation, ultraviolet rays, x-rays and gamma rays

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10
Q

part of electromagnetic spectrum from 1 Hz to 3000 GHz (3 THz)

A

radio frequency spectrum

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11
Q

1 oscillation/ 1 cycle

A

1 Hz

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12
Q

widely used in modern technology, particularly in telecommunication

A

Electromagnetic waves

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13
Q

ITU

A

International Telecommunication Union

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14
Q

united agency on specialized UN specialized agency for digiatal technologies

A

ITU

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15
Q

responsible for allocating the use of global radio spectrum and satellite orbits, develop the technical standards that ensure networks and technologies connect seamlessly, and to work to improve access to digital technologies in underserved communities worldwide

A

ITU

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16
Q

NTC

A

National Telecommunications Commissions

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17
Q

primary telecommunications regulator of the Philippines.

A

NTC

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18
Q

allocation of radio for different uses like mobile networks, broadcasting, and satellite communications. they have the authority to allocate, monitor, and manage radio frequencies to ensure efficient use and prevent

A

NTC

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19
Q

designation for radio frequencies in the range of 3-30 kHz, corresponding to wavelengths from 100 to 10 km

A

Very Low Frequency

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20
Q

very low frequency is also known as

A

Myriameter band or myriameter wave

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21
Q

primarily travel by line-of-sight, meaning they typically require and unobstructed path between transmitter and receiver

A

very low frequency

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22
Q

applications of very low frequency

A

morse code, through-the-earth signalling (mine communications), submarine communications

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23
Q

VLF is the iTU designation for radio frequencies in the range of ____

A

3-30kHz

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24
Q

VLF corresponding wavelengths from ____?

A

100 to 10 km

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25
ITU designation for radio frequencies in the range of 30-300 kHz.
low frequency
26
LF is the ITU designation for radio frequencies in the range of ____?
30-300 kHz
27
LF wavelengths range from ____?
10-1km
28
LF is also known as?
kilometer band or kilometer waves
29
applications of low frequency
- non-directional beacons (190-300kHz) - Radio Clocks (typically at 60 kHz) - Differential Global Positioning Systems (DGPSs) - LF RFIDs (Typically at 125 kHz)
30
ITU designation for radio frequencies in the of 300 kilohertz to 3 megahertz
medium frequency
31
MF is the ITU designation for radio frequencies in the range of ____?
300 kilohertz to 3 megahertz
32
The MF band is also known as
hectometer band
33
MF wavelengths range from ___?
ten to one hectometers (1000 to 100m)
34
applications of medium frequency
- AM radio broadcasting - Non-directional beacons (190-435 kHz) - Maritime Distress Frequency (500 kHz) - "Top Band" amateur radio
35
ITU designation for the band of radio waves with frequency between 3 and 30 megahertz (MHz).
High frequency
36
HF ITU designation for the band of radio waves with frequency between ___?
between 3 and 30 megahertz (MHz)
37
HF is also known as ___?
decameter band or decameter wave
38
high frequency wavelengths
one to ten decameters (ten to one hundred meters)
39
applications of high frequency
- long distance aircraft communication - over the horizon radars - coastal ocean dynamics applications radar (CODAR) - HF RFID (typically at 13.56 MHz)
40
ITU designation for the range of radio waves from 30 to 300 MHz
Very High Frequency
41
wavelength of VHF
ten meters to one meter
42
VHF also known as
meter band or meter wave
43
propagate mainly by line of sight so the can be blocks by hills and mountains
VHF radio waves
44
applications of Very High Frequency
- FM radio broadcasting (typically 88-108 MHz) - Marine VHF Radio - Operation of RC Aircraft - Walkie-Talkies - Analog Television - Automatic Identification System (AIS) in SHips - MRI
45
VHF in Aviation
- Between 108-137 MHz - The lowest 10 MHz is for VOR and ILS Localizers.Each channel has a 50 kHz increment. - Voice communications is at 118-136.975 MHz. Each channel has a 50 kHz increment. - A typical transmission range of an aircraft flying at cruising altitude (35,000 ft), is about 322 km in good weather conditions. - International Air Distress (IAD) frequency (121.5 MHz) - Analog Emergency Locator Transmitters (ELTs)
46
ITU designation for radio frequencies in the range between 300 megahertz (MHZ) and 3 gigahertz (GHz)
Ultra High Frequency
47
Ultra High Frequency ITU designation for radio frequencies in the range between ____?
300 megahertz (MHZ) and 3 gigahertz (GHz)
48
UHF is also known as?
decimetre ban
49
UHF wavelengths range from
one meter to one tenth of a meter
50
applications of UHF
- Wi-Fi (2.4 GHz) - Bluetooth - Satellite Phones - 3G Cellular Networks - Digital Television - Ground Penetrating Radar
51
UHF in Aviation
- ILS Glideslope - DME - Military aviation communications - Air Surveillance Radar - Digital Emergency Locator - Transmitters (ELTs)
52
ITU designation for radio frequencies in the range between 3 and 30 gigahertz (GHz)
Super High Frequency
53
SHF ITU designation for radio frequencies in the range between ?
3 and 30 gigahertz
54
SHF is also known as?
centimetre band or centimetre wave
55
SHF wavelength range
one to ten centimetres.
56
These frequencies fall within the microwave band, so radio waves with these frequencies are called
microwaves
57
SHF applications
- Weather and Military Radars - Satellite Communications - Wi-Fi - 4G above Cellular Networks - Microwave Ovens - Precision Approach Radar
58
ITU designation for the band of radio frequencies in the electromagnetic spectrum from 30 to 300 GHz
Extremely High Frequency
59
EHF is the ITU designation for the band of radio frequencies in the electromagnetic spectrum from
30 to 300 GHz
60
Radio waves in EHF band have wavelengths from
10-1mm
61
EHF is also known as?
millimeter band and radiation in this band is called millimeter waves, sometimes abbreviated MMW or mmWave.
62
Extremely High Frequency applications
- Automotive Radars - Radio Astronomy - Intersatellite Links - Fire-control Radars - Millimeter Wave Scanner - Radar Speed Guns
63
is a signaling method which can alert an individual aircraft that a ground station wishes to communicate with it.
Selective Calling
64
introduced in 1957 and still used today
Selective Calling
65
signals can be transmitted over either HF or VHF RTF
Selective Calling
66
allows crew to ignore radio traffic not intended for their A/C
Selective Calling
67
used by ground stations to indicate which aircraft is being called
Selective Calling
68
How does SELCAL works
- SELCAL code consists of two pairs of letters - uses 'A' to 'Z', but doesn't use I, N, O - each pair is in alphabetical order (ex. GQ, not QG) - each letter corresponds to audio frequency tone
69
is the registrar of SELCA codes worldwide. SELCAL codes are assigned to aircraft operators and not to individual aircraft.
Aviation Spectrum Resources (ASRI)
70
Responsible for assigning SELCAL codes
Aviation Spectrum Resources (ASRI)
71
communication between aircraft and ground stations via satellite, extending communication range and providing voice and data connectivity.
Satellite Communication
72
provides communication coverage in even the most remote areas of the world.
Satellite Communication
73
SATCOM on Voice Communication
Pilots can use SATCOM to talk to air traffic control (ATC) or their airline's operations center (AOC), especially when they're flying over oceans or remote areas where regular radio communication isn't possible
74
SATCOM ON data communication
1. Weather updates 2. Flight plans 3.Aircraft performance data 4. Passenger communication
75
an airborne system developed by the FAA that operates independently from the ground based ATC system.
Traffic Alert and Collision Avoidance System
76
was designed to increase flight deck awareness of proximate aircraft and to serve as a "last line of defense" for the prevention of mid-air collisions.
Traffic Alert and Collision Avoidance System
77
colors on TCAS
- white/cyan - other traffic - amber/yellow - proximity traffic - red - threat traffic
78
shapes on TCAS
- circle - proximate traffic - diamond - other traffic - yellow circle - TA - red square - RA
79
ADS-B
Automatic Dependent Surveillance - Broadcast
80
means by which aircraft, aerodrome vehicles and other objects can automatically transmit and/or receive data such as identification, position and additional data, as appropriate, in a broadcast mode via a data link
ADS-B
81
Data Broadcasted by ADS-B:
- Precise Location (Latitude, Longitude, Altitude) - Ground Speed - Heading - A/C Identification - Rate of Climb/Descent - A/C Type

2-8 MIDTERMS 2ND SEM (9 decks)

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