Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

RNAV > GPS > Flashcards

GPS Flashcards

1
Q

The navigation message contains clock correction parameters which are used for:

a) correction of satellite time
b) correction of receiver time

A

a) correction of satellite time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Pseudo random Noise: Code used for the ____ of the satellites and the measurement of the time taken by the signal to reach the receiver.

A

identification

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

GLONASS: _ satellites, _ orbital planes, orbital height of 19,100 km.

A

24, 3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

In what type of nominal orbit are NAVSTAR satellites placed?

a) Nearly circular
b) Elliptical

A

a) Nearly circular

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

A GPS control segment consists of: Master ___ station, monitor stations and ground ___.

A

Control, antennas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Galileo: 1/2/3 clocks have been developed, a R___ Frequency Standard Clock and a Passive Hydrogen Maser clock.

A

2, Rubidium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

In a GPS, primary position information is in the form of spheres with the airplane/satellites in the centre of the spheres.

A

satelllites

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

GPS er með 1575 MHz og 1227 MHz. Hvaða tíðni notar commercial flight og hvað mörg code?

A

1275 MHz og one code.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

How does a receiver of the NAVSTAR GPS satellite navigation system determine the elevation and azimuth data of a satellite relative to the location of the antenna?

a) data is stored in the receiver together with the Pseudo Random Noise (PRN) code.
b) It calculates it by using almanac data transmitted by the satellites.

A

b) It calculates it by using almanac data transmitted by the satellites.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

GPS time can be converted to UTC by application of the:

a) UTC parameters sent in the navigation message
b) Correction given by atomic clocks

A

a) UTC parameters sent in the navigation message

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Hvað er RAIM?

A

Technique by which a receiver checks the reliability of the signals it is receiving and can detect if one of the signals is incorrect.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

NAVSTAR: Receiver clock error is

a) corrected by using signals from four satellites.
b) negligibly small because of accuracy of the atomic clocks in the satellites

A

a) corrected by using signals from four satellites.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

In a GNSS/GPS, a position line is obtained by:

a) timing the period that is taken for a satellites transmission to reach the aircrafts receiver
b) the aircrafts receiver measuring the time difference between signals received from a minimum number of satellites.

A

a) timing the period that is taken for a satellites transmission to reach the aircrafts receiver

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Which of the following NAVSTAR GPS satellite navigation system codes can be processed by unauthorised civil aviation receivers?

a) C/A
b) C/A and P

A

a) C/A

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

How many clocks in a NAVSTAR satellite?

A

4

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

GPS satellites transmit on two L-band frequencies with different types of signals. Which of these are generally available for use by civil aviation?

a) L1-precise (P)
b) L1-corase acquisition (C/A) with selected availability (S/A)

A

b) L1-corase acquisition (C/A) with selected availability (S/A)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

EGNOS (European Geostationary Navigation Overlay System) is a form of

a) Wide area differential GPS (WADGPS)
b) Local Area Differential GPS (LADGPS)

A

a) Wide area differential GPS (WADGPS)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

In EGNOS and WAAS systems the corrections for an aeroplane’s GNSS receiver are broadcast:

a) By the wide area master station
b) via a geostationary satellite.

A

b) via a geostationary satellite.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Which one of the following systems is self contained? a) GPS b) Inertial Navigation System c) VOR/DME d) Basic RNAV system

A

b) Inertial Navigation System

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Aircraft equipped to operate to RNP 1 and better, should be able to

a) compute the exact value of its position error
b) compute an estimate of its position error

A

b) compute an estimate of its position error

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Where is RNP used?

a) For RNAV routes
b) For precision approaches

A

a) For RNAV routes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

On some charts you will find “RNP AR APCH”. The AR means

a) Arriving
b) Authorization required

A

b) Authorization required

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

3D RNAV fixing provides

a) Horizontal and vertical profile guidance
b) Horizontal, vertical profile and time guidance

A

a) Horizontal and vertical profile guidance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

A phantom station (as used in a 2D RNAV system) is

a) a waypoint defined by a radial and a DME distance from a VOR/DME station
b) A non existing VOR/DME station defined by two DME

A

a) a waypoint defined by a radial and a DME distance from a VOR/DME station

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Which of the following lists all the parameters that can be determined by a GPS receiver tracking signals from 4 different satellites?

c. Latitude, longitude, altitude and time
d. Latitude, longitude and altitude

A

c. Latitude, longitude, altitude and time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

WGS84 model of the earth is an

a. elipse b. geoid c. sphere

A

b. geoid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

Which of the following lists all the parameters that can be determined by a GPS receiver tracking signals from 4 different satellites?

c. Latitude, longitude, altitude and time
d. Latitude, longitude and altitude

A

c. Latitude, longitude, altitude and time

28
Q

In order to carry out an Independent three-dimensional fix. Receiver Autonomous Integrity Monitoring (RAIM) and failure detection and exclusion of any faulty satellite, signal reception is required from a minimum number of how many satellites?

a. 5
b. 6

A

b. 6

29
Q

The distance between a NAVSTAR/GPS satellite and receiver is:

c. determined by the time taken for the signal to arrive from the satellite multiplied by the speed of light
d. determined by the phase shift of the Pseudo Random Noise code multiplied by the speed of light

A

c. determined by the time taken for the signal to arrive from the satellite multiplied by the speed of light

30
Q

What type of satellite navigation system NAVSTAR/GPS receiver is most suitable for use on board an aircraft?

a. Multiplex
c. Multichannel

A

c. Multichannel

31
Q

In the NAVSTAR/GPS satellite navigation system, receiver clock error:

a. is corrected by using signals from four satellites
b. can be minimised by synchronisation of the receiver clock with the satellite clocks

A

a. is corrected by using signals from four satellites

32
Q

In relation to the NAVSTAR/GPS satellite navigation system, what is involved in the differential technique (D-GPS)?

a. The difference between signals transmitted on the L1 and L2 frequencies are processed by the receiver to determine an error correction
d. Fixed ground stations compute position errors and transmit correction data to a suitable receiver on the aircraft

A

d. Fixed ground stations compute position errors and transmit correction data to a suitable receiver on the aircraft

33
Q

How does a receiver of the NAVSTAR/GPS satellite navigation system determine the elevation and azimuth data of a satellite relative to the location of the antenna?

b. The data is determined by the satellite and transmitted together with the navigation message
c. It calculates it by using Almanac data transmitted by the satellites

A

c. It calculates it by using Almanac data transmitted by the satellites

34
Q

The different segments of the satellite navigation system NAVSTAR/GPS are the:

a. control, space and user
b. main control station, the monitoring station and the ground antennas

A

a. control, space and user

35
Q

The main task of the user segment (receiver) of the satellite navigation system NAVSTAR/GPS is to calculate receiver position by:

a. selecting appropriate satellites automatically, to track the signals and to measure the time taken by signals from the satellites to reach the receiver
b. monitoring the status of the satellites, determine their positions and to measure the time

A

a. selecting appropriate satellites automatically, to track the signals and to measure the time taken by signals from the satellites to reach the receiver

36
Q

The geometric shape of the reference system for the satellite navigation system NAVSTAR/GPS. defined as WGS 84. is:

a. a geoid
c. an ellipsoid

A

c. an ellipsoid

37
Q

In relation to the satellite navigation system NAVSTAR/GPS. the term ‘inclination’ denotes the angle between the:

b. orbital plane and the equatorial plane
c. orbital plane and the earth’s axis

A

b. orbital plane and the equatorial plane

38
Q

At what approximate height above the WGS-84 ellipsoid are NAVSTAR/GPS satellites circling the earth?

a. 20200 km
d. 19500 km

A

a. 20200 km

39
Q

Which of the following data, in addition to the Pseudo Random Noise (PRN) code, forms part of the so called ‘Navigation Message’ transmitted by NAVSTAR/GPS satellites?

a. almanac data: satellite status information
b. data to correct receiver clock error; almanac data

A

a. almanac data: satellite status information

40
Q

Phase modulation:

a. results in a change of polarisation of the modulated signal.
b. is a modulation form used in GPS where the phase of the carrier wave is reversed.

A

b. is a modulation form used in GPS where the phase of the carrier wave is reversed.

41
Q

The VDB (VHF data broadcast) broadcasts the GBAS signal within its coverage area to avionics in GBAs-equipped aircraft. The VDB signal provided are:

a. error correction data, integrity data and approach data for more than one runway.
b. error correction data and integrity data.

A

a. error correction data, integrity data and approach data for more than one runway.

42
Q

SBAS systems improve the performance of GPS by:

c. providing an additional signal to GPS receivers.
d. providing an additional signal coming from the geostationary satellites.

A

d. providing an additional signal coming from the geostationary satellites.

43
Q

How many clocks are installed in each NAVSTAR GPS satellite?

b. 4
c. 2
d. 3

A

b. 4

44
Q

GPS satellites transmit on two L-band frequencies with different types of signals. Which of these are generally available for use by civil aviation?

b. L1-coarse acquisition
c. L2-coarse acquisition (C/A)

A

b. L1-coarse acquisition

45
Q

In accordance with ICAO Annex 10 the NAVSTAR/GPS global average 95% position accuracy in SPS should be :

a. 5m vertically
b. 13m horizontally
c. 30m horizontally

A

b. 13m horizontally

46
Q

For what reason is a mask angle set-up in a GPS-receiver?

b. To deny the receiver the use of GPS-satellites with an elevation less than the mask angle.
c. To select from all visible GPS-satellites the satellite-configuration which results in the smallest GDOP.

A

b. To deny the receiver the use of GPS-satellites with an elevation less than the mask angle.

47
Q

EGNOS (European Geostationary Navigation Overlay System) is a form of:

c. stand-alone Global Navigation Satellite System (GNSS)
d. Wide Area Differential GPS (WADGPS)

A

d. Wide Area Differential GPS (WADGPS)

48
Q

In NAVSTAR/GPS the PRN codes are used to determine satellite __ and ___.

A

range, identification

49
Q

The NAVSTAR/GPS constellation comprises __ satellites in __ orbits

A

24, 6

50
Q

The NAVSTAR/GPS space segment:

a. provides X, Y, Z & T co-ordinates and the constellation data
b. provides X, Y & Z co-ordinates and monitoring of the accuracy of the satellite data

A

a. provides X, Y, Z & T co-ordinates and the constellation data

51
Q

NAVSTAR GPS receiver clock error is removed by:

a. regular auto-synchronisation with the satellite clocks
b. synchronisation with the satellite clocks on initialisation
c. adjusting the pseudo-ranges to determine the error

A

c. adjusting the pseudo-ranges to determine the error

52
Q

The contents of the navigation and systems message from NAVSTAR/GPS SVs include:

a. satellite clock error, almanac data, ionospheric propagation information
b. satellite clock error, almanac data, satellite position error

A

a. satellite clock error, almanac data, ionospheric propagation information

53
Q

The orbital height of geostationary satellites is:

a. 35800 km
b. 10313 nm
c. 19330 km

A

a. 35800 km

Þetta er verulega tæpt, það er alltaf talað um 20,200 í GPS satellites.. er þetta eitthvað annað?

54
Q

The azimuth and elevation of the satellites is:

c. determined by the receiver from the satellite almanac data
d. determined by the satellite and transmitted to the receiver

A

c. determined by the receiver from the satellite almanac data

55
Q

The number of satellites required to produce a 4D fix is:

a. 3
b. 5
c. 4
d. 6

A

c. 4

56
Q

How many satellites are needed for a 2D fix?

a. 4
b. 3
c. 5
d. 2

A

b. 3

57
Q

‘Unauthorised’ civilian users of NAVSTAR/GPS can access:

a. the C/A code
c. the P code
d. the C/A and P codes

A

a. the C/A code

58
Q

RAIM is achieved:

b. by ground monitoring stations determining the satellite range errors which are relayed to receivers via geo-stationary satellites
d. within the receiver

A

d. within the receiver

59
Q

The NAVSTAR/GPS constellation comprises:

a. SVs each in 4 orbits
c. SVs each in 6 orbits

A

c. SVs each in 6 orbits

60
Q

When flying under IFR using GPS and a multi-sensor system:

a. The GPS must be operating and its information displayed
d. The multi-sensor system must be operating and its information displayed

A

d. The multi-sensor system must be operating and its information displayed

61
Q

In NAVSTAR/GPS the space segment:

b. Provides the positional information to the receiver
d. relays positional data from the control segment

A

b. Provides the positional information to the receiver

62
Q

The major limitation in the use of GPS for precision approaches using wide area augmentation systems (WAAS) is:

a. degradation of range measurement because of ionospheric propagation errors
b. global coverage of WAAS is not available
c. the height difference between the ellipsoid and the earth

A

c. the height difference between the ellipsoid and the earth

63
Q

EGNOS provides a WAAS by determining the errors in …… and broadcasting these errors to receivers using ……

a. SV range, pseudolites
b. X, Y & Z co-ordinates, geostationary satellites
c. X, Y & Z co-ordinates, pseudolites
d. SV range, geostationary satellites

A

d. SV range, geostationary satellites

64
Q

The principle error in GNSS is:

a. receiver clock error
c. ionospheric propagation

A

c. ionospheric propagation

65
Q

The NAVSTAR/GPS frequency available to non-authorised users is:

a. 1215.0 MHz
b. 1575.42 MHz
d. 1227.6 MHz

A

b. 1575.42 MHz

RNAV (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions