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ATPL > RNAV > Flashcards

RNAV Flashcards

1
Q

HF radio waves travel

A

Daytime + Night time = Sky waves and ground wave

  • ground wave range v short
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2
Q

Aircraft in RNP 10 ops require

A

2 LRNSs made up of INS, IRS or GNSS.

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3
Q

Scalloping is

A

an error caused by propagation over uneven terrain, evident by swaying of the needle. called also the bends.

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4
Q

The ionospheric model parameters in the nav message are used for

A

the receiver to calculate the delay of GPS signals passing through ionosphere

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5
Q

What GPS receiver is used in aviation?

A

Multichannel Receiver

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6
Q

The doppler VOR

A

Doppler is used to create a signal received by aircraft’s OVR receiver as a FM signal.

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7
Q

Single side band is used

A

in HF two way comms.

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8
Q

GLS vs ILS

A

GLS allows for more precise navigation within airfield vicinity

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9
Q

GBAS corrects for

A

Satellite clock errors
Ephemeris
Ionospheric propagation

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10
Q

GBAS correction info is relayed using what frequency? What is it’s range?

A

using VHF data link on VOR frequencies 108-118. limited to 30KM.

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11
Q

Displacement doubles, DDOM ____?

A

Doubles too

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12
Q

VOR radial takes into account variation at the VOR or the AC

A

VOR

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13
Q

ILS produces what signal

Specify AM or FM

A

AM radiation pattern 90 and 150Hz.

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14
Q

VHF propagation path

A

space wave

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15
Q

UHF propagation path

A

space wave

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16
Q

Max skip distance is given by ____ frequency and _____ ionospheric layer

A

Higher frequency and Higher ionospheric layer

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17
Q

Higher frequency = ____ attenuation

A

Higher

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18
Q

PBN factors

A 
Accuracy
Integrity
Availability
Continuity
Functionality
Resolution

QB : ACCURACY RESOLUTION INTEGRITY

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19
Q

Skip distance

A

distance between transmitter and first sky wave

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20
Q

Enhanced Surveillance Mode S EHS

A

MR TIMS VTG

Magnetic Heading
Roll Angle

True Track Angle
Indicated Airspeed
Mach Number
Selected Altitude

Vertical Rate
Track Angle Rate
Groundspeed

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21
Q

Mode S ELS

A 
Identity
Altitude 
Transponder Capability
Status
SI Code
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22
Q

Mountain effect is caused by

A

REFLECTION

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23
Q

What frequency band do AWR use

A

SHF

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24
Q

Pulse technique

A

= radar

Which of the following types of radar equipment operate by means of the pulse technique?

  1. Aerodrome Surface Movement Radar
  2. Airborne Weather Radar
  3. Secondary Surveillance Radar (SSR)
  4. Aerodrome Surveillance (approach) Radar

ALL

25
Q

DME identification with collocated VOR

A

every 40sec on 1350Hz audio freq

26
Q

Radio signal classification (A1A) meaning of signals

A

A- type of modulation
1- Nature of signal
A- Nature of information

We need 1st modulation then 2nd signal to get 3rd information

27
Q

GPS augmented by EGNOS, alert time after loss of integrity

A

6s

28
Q

FM signals on frequencies just below 108MHZ cause ILS to

A

interfere with localiser leading to erroneous deviation indication

29
Q

cathode AWR severity

A

green/yellow/red

30
Q

Phase Modulation

A

Modulation form used in GPS where phase of carrier wave is reversed

31
Q

GALILEO satellites, planes information

A

3 orbital planes at 56° to the equator

32
Q

AAIM vs RAIM

A 
AAIM = ABAS + IRS
RAIM = ABAS only
33
Q

NDB range depends on

A

Power output and nature of earth’s surface over propagation path

34
Q

NAVSTAR altitude

A

20200KM

35
Q

GLONASS altitude

A

19100KM

36
Q

GALILEO altitude

A

23200KM

37
Q

NAVSTAR planes

A

6 planes 55° equator

38
Q

GALILEO planes

A

3 at 56°

39
Q

Fastest satellite system

A

GLONASS 11:15hrs

40
Q

GALILEO orbital period

A

14hrs

41
Q

GALILEO satellites

A

30

42
Q

GLONASS =

A

Russian

43
Q

GALILEO

A

European

44
Q

DVOR less sensitive to site errors than CVOR because

A

large antenna

45
Q

WX+T shows

A

turbulence within precipitation by detecting doppler shift of reflected radar signals

46
Q

Back beam reverse sensing will occur if

A

OBI : irrelevant of course

HSI : Back course

47
Q

Most accurate RNAV fixes

A

DME/DME
DME/VOR
VOR/VOR
IRS

48
Q

PRF =

A

Pulses per second (not cycles)

49
Q

EGNOS vs GPS

A

GPS satellites are not geostationary, EGNOS are.

50
Q

Doppler FM or AM

A

FM

51
Q

GPS receiver can determine AC groundspeed by

A

Measuring doppler shift

52
Q

Range of a pulse

A

Range = c / 2PRF

53
Q

GALILEO Clocks

A

2 different and independent atomic clocks

54
Q

MLS Coverage

A

40° for 20NM

55
Q

L1 and L2 frequencies help reduce :

A

Ionospheric Delay

56
Q

What type of signals

A

weather - 3-5 pencils Map - Fan

57
Q

Max DME Error

A

1.25% + 0.25NM of distance if before 1989

After 1980 0.1NM

58
Q

Data frames in a NAV message

A

12.5mins // 25 packs

ATPL (5 decks)

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