To ensure the transmitted data of the satellites is controlled and updated from time to time by ground stations.

3                   

To transmit a signal used by a suitable receiver to calculate position.

 

4                   

It calculates the aircraft position.

 

Вопрос 334

How does a NAVSTAR GPS satellite navigation system receiver recognise which of the received signals belongs to

 

which satellite?

 

 

Ответы

1                   

The receiver detects the direction from which the signals are received and compares this information with the calculated positions of the satellites.

 

2                   

Each satellite transmits its signal on a separate frequency.

 

3                   

The Doppler shift is unique to each satellite.

 

4              

Each satellite transmits its signal, on common frequencies, with an individual Pseudo Random Noise code.

 

 

Вопрос 335

Type of clock is used in NAVSTAR GPS satellites

 

 

Ответы

1                   

Laser

 

2                   

Mechanical

 

3              

Atomic

 

4                   

Quartz

 

 

Вопрос 336

Which of the following, if any, is a prerequisite if a receiver of a NAVSTAR GPS satellite navigation system is to be

 

used in combination with a multi sensor system?

 

 

Ответы

1                   

The prescribed IFR equipment must be in working correctly and the navigation information continuously displayed.

 

2                   

Multisensor systems are not certificated for flights under IFR conditions.

 

3                   

The RAIM function of the GPS receiver must be able to monitor all prescribed navigation systems.

4              

The prescribed IFR equipment must be installed and operational.

 

 

Вопрос 337

RAIM is achieved:

 

 

Ответы

1                   

by ground stations determining the X, Y and Z errors and passing the corrections to receivers using pseudolites.

 

2                   

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

 

3                   

any of the above.

 

4              

Within the receiver.

 

 

Вопрос 338

Which of the following statements is correct concerning the principle behind the correction of one of the NAVSTAR

 

GPS satellite navigation system errors by the transmission of the signals on two frequencies (L1 and L2)?

 

 

Ответы

1                   

The effect of receiver noise can be reduced due to the interference of both frequencies.

 

2                   

The effect of signal reflections (multipath effect) can be reduced due to the interference of both frequencies.

 

3                   

The influence of shadowing on the GPS signals is proportional to the inverse of the carrier frequency squared.

 

4              

The path delay of the signals in the earth atmosphere is proportional to the inverse of the carrier frequency squared.

 

Вопрос 339

One of the tasks of the GPS control segment

 

 

Ответы

1                   

to regulate the transmitted power by the satellites.

 

2                   

to calculate and transmit differential corrections to users which are able to receive Wide Area Differential GPS systems.

3              

To determine and send new ephemeris and new satellite clock error data to the GPS-satellites.

 

4                   

to control continuously the position and the motion of GPS-satellites.

 

 

Вопрос 340

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

 

aviation receivers?

 

 

Ответы

1              

C/A.

 

2                   

С/A and P.

 

3                   

P and Y.

 

4                   

p

Вопрос 341

Time taken to receive the complete Navigation Message (complete set of data) from all satellites is

 

 

Ответы

1                   

25 seconds (= 1 second per data frame).

 

2              

12.5 minutes (= 30 seconds per data frame).

 

3                   

12 hours (= period of the satellites orbit).

 

4                   

24 seconds (= 1 second per data frame).

 

Вопрос 342

In which frequency band do satellite assisted navigation systems (GNSS/GPS) provide position information that

 

available to civil aircraft?

 

 

Ответы

1                   

EHF

 

2              

UHF

 

3                   

VHF

 

4                   

SHF

 

 

Вопрос 343

What are the data elements transmitted by NAVSTAR GPS satellites?

 

1) Offset of the satellite clock from UTC.

 

2) Ephemeris data.

 

3) Satellite "health" status data.

 

4) Ionospheric delays.

 

5) Solar activity.

 

 

Ответы

1                   

1, 2, 3 only

 

2              

Only

 

3                   

2, 3, 4 only

 

4                   

1,2,3,4,5

 

Вопрос 344

In civil aviation, the height value computed by the receiver of the satellite navigation system NAVSTAR GPS is the:

 

 

Ответы

1                   

flight level.

 

2                   

height above Mean Sea Level (MSL).

 

3              

Height above the WGS-84 ellipsoid.

 

4                   

geometric height above ground.

 

 

Вопрос 345

Which of the following combinations of satellite navigation systems provide the most accurate position fixes in air

 

navigation?

 

 

Ответы

1                   

NNSS-Transit and GLONASS

 

2                   

NAVSTAR/GPSand NNSS-Transit

3              

NAVSTAR/GPS and GLONASS

 

4                   

GLONASS and COSPAS-SARSAT

 

 

Вопрос 346

Which of the following satellite navigation systems has Full Operational Capability (FOC) and is approved for

 

specified flights under IFR conditions in Europe?

 

 

Ответы

1                   

NNSS/Transit

 

2                   

COSPAS-SARSAT

 

3              

NAVSTAR GPS

 

4                   

GLONASS

 

 

Вопрос 347

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?

 

 

Ответы

1                   

Data to correct receiver clock error; almanac data.

 

2                   

Time; positions of the satellites.

 

3