062.06 GNSS

Question 1

In the Navigation message, the ephemeris refers to the exact position and orbit of (the observed satellite/all satellites in the constellation/all satellites in the same orbit)​.

Answer 1

In the Navigation message, the ephemeris refers to the exact position and orbit of (the observed satellite).

Question 2

The geometric shape of WGS84 is a(n) (sphere/ellipsoid/geoid)​.

Answer 2

The geometric shape of WGS84 is a(n) (ellipsoid).

Question 3

GLONASS:

• (10/24/30) satellites
• (3/6) orbital planes
• Orbital height (18 400/19 100/20 200/23 200)
• Orbital period (11 hrs 15 min/≈12 hrs/14 hrs/24 hrs)

Answer 3

GLONASS:

• (24) satellites
• (3) orbital planes
• Orbital height (19 100)
• Orbital period (11 hrs 15 min)

Question 4

NAVSTAR GPS satellites are placed in a (geo-stationary/nearly circular/elliptical)​ nominal orbit.

Answer 4

NAVSTAR GPS satellites are placed in a (nearly circular) nominal orbit.

Question 5

It takes (24 sec/25 sec/12.5 min/12 hrs) to receive the complete Navigation Message from all satellites.

Answer 5

It takes (12.5 min) to receive the complete Navigation Message from all satellites.

Question 6

The principle of SBAS is to measure (on the ground/in additional satellites) the signal errors transmitted by GNSS satellites and transmit differential corrections and integrity messages for navigation satellites.

Answer 6

The principle of SBAS is to measure (on the ground) the signal errors transmitted by GNSS satellites and transmit differential corrections and integrity messages for navigation satellites.

Question 7

A GBAS supports all phases of approach, landing, departure and surface operations within an area of coverage of approximately (10/30/60/100) ​km.

Answer 7

A GBAS supports all phases of approach, landing, departure and surface operations within an area of coverage of approximately (30) km.

Question 8

NAVSTAR GPS satellites transmit on two UHF frequencies. L2 operates at (1227/1575) MHz and provides (Standard/Precise) Positioning Service for (military/civilian) users. It transmits (only the P code / both C/A and P codes)​.

Answer 8

NAVSTAR GPS satellites transmit on two UHF frequencies. L2 operates at (1227) MHz and provides (Precise) Positioning Service for (military) users. It transmits (only the P code).

Question 9

(Multiplex/Multichannel/Sequential) NAVSTAR/GPS receivers are most suitable for use on board an aircraft.

Answer 9

(Multichannel) NAVSTAR/GPS receivers are most suitable for use on board an aircraft.

Question 10

The space segment of a NAVSTAR/GPS system consists in the notional constellation of (24/30) satellites in (3/5/6/8) orbital planes with (4/5/6/8) satellites in each plane at an approximate height of (19 500/20 200/23 200) km above the WGS 84 ellipsoid. It takes one satellite approximately (12/24/48) hours to orbit the earth.

Answer 10

The space segment of a NAVSTAR/GPS system consists in the notional constellation of (24) satellites in (6) orbital planes with (4) satellites in each plane at an approximate height of (20 200) km above the WGS 84 ellipsoid. It takes one satellite approximately (12) hours to orbit the earth.

Question 11

When using NAVSTAR GPS on a non-precision approach, the datum used for the MDA is (radar/GPS/barometric) ​altitude.

Answer 11

When using NAVSTAR GPS on a non-precision approach, the datum used for the MDA is (barometric) altitude.

Question 12

The navigation message of the Galileo GNSS contains information concerning the satellite orbit (and/and not) the clock references.

Answer 12

The navigation message of the Galileo GNSS contains information concerning the satellite orbit (and) the clock references.

Question 13

For NAVSTAR GPS, the term inclination denotes the angle between the (orbital plane and the equatorial axis/horizontal plane at the location of the receiver and the orbital plane of a satellite).

Answer 13

For NAVSTAR GPS, the term inclination denotes the angle between the (orbital plane and the equatorial axis)​.

Question 14

For the timing section of the Galileo satellite system, 2 clocks have been developed, a (Rubidium/Caesium) Frequency Standard clock and a Passive Hydrogen Maser clock.

Answer 14

For the timing section of the Galileo satellite system, 2 clocks have been developed, a (Rubidium) Frequency Standard clock and a Passive Hydrogen Maser clock.

Question 15

The abbreviation ‘LAAS’ stands for (…).

Answer 15

The abbreviation ‘LAAS’ stands for (Local Area Augmentation System). It is practically a GBAS.

Question 16

Generally satellites are considered to be ‘in view’ by the receiver for the SPS if they are more than (7.5/10/15)°​ above the horizon.

Answer 16

Generally satellites are considered to be ‘in view’ by the receiver for the SPS if they are more than (7.5)° above the horizon.

Question 17

The abbreviation RAIM stands for (…)​.

Answer 17

The abbreviation RAIM stands for (Receiver Autonomous Integrity Monitoring).

Question 18

The navigation message contains clock correction parameters which are used for correction of (receiver/satellite/both receiver and satellite) ​time.

Answer 18

The navigation message contains clock correction parameters which are used for correction of (satellite) time.

Question 19

Clock bias is the process of correcting the pseudo range for (receiver/satellite/receiver and satellite)​ clock errors.

Answer 19

Clock bias is the process of correcting the pseudo range for (receiver) clock errors.

Question 20

In each Galileo satellite there are two (identical/non-identical) atomic clocks. The clocks are synchronized with (each other/a network of clocks which are located on the ground)​.

Answer 20

In each Galileo satellite there are two (non-identical) atomic clocks. The clocks are synchronized with (a network of clocks which are located on the ground).

Question 21

In respect to the use of GNSS, Dilution Of Precision (DOP) is a loss of accuracy due to (…)​.

Answer 21

In respect to the use of GNSS, Dilution Of Precision (DOP) is a loss of accuracy due to (relative position of the visible satellites).

Question 22

The abbreviation EGNOS stands for (…)​.

Answer 22

The abbreviation EGNOS stands for (European Geostationary Navigation Overlay Service).

Question 23

During an approach to an airfield, GBAS functions as (replacement/correction) of on-board GPS position, allowing (precision/non-precision)​ approaches.

Answer 23

During an approach to an airfield, GBAS functions as (correction) of on-board GPS position, allowing (precision) approaches.

Question 24

NAVSTAR GPS satellites transmit on two UHF frequencies. L1 operates at (1227/1575) MHz and provides (Standard/Precise) Positioning Service for (military/civilian) users. It transmits (only the P code / both C/A and P codes)​.

Answer 24

NAVSTAR GPS satellites transmit on two UHF frequencies. L1 operates at (1575) MHz and provides (Standard) Positioning Service for (civilian) users. It transmits (both C/A and P codes).

Question 25

The inclination of the Galileo satellite orbits to the plane of the equator is (23/45/55/56)°​.

Answer 25

The inclination of the Galileo satellite orbits to the plane of the equator is (56)°.

Question 26

Satellites transmit (UTC/SV/LT) time. In NAVSTAR GPS satellites a(n) (laser/Quartz/mechanical/atomic) clock is used.

Answer 26

Satellites transmit (SV) time. In NAVSTAR GPS satellites a(n) (atomic) clock is used.

Question 27

The VDB (VHF Data Broadcast) broadcasts the GBAS signal within its coverage area to avionics in GBAS-equipped aircraft. The VDB signal provided conaints error correction data, integrity data and approach data for (one/more than one) runway.

Answer 27

The VDB (VHF Data Broadcast) broadcasts the GBAS signal within its coverage area to avionics in GBAS-equipped aircraft. The VDB signal provided conaints error correction data, integrity data and approach data for (more than one) runway.

Question 28

Galileo operates (24/30) satellites in (3/5/6/9) orbital planes with in each plane (…)​. A Galileo satellite orbits the earth in (8/10/12/14)​ hours.

Answer 28

Galileo operates (30) satellites in (3) orbital planes with in each plane (9 satellites + 1 spare replacement). A Galileo satellite orbits the earth in (14) hours.

Question 29

In accordance with ICAO Annex 10, the NAVSTAR/GPS global average 95% position accuracy in SPS should be (5/13/22/30)​ metres horizontally.

Answer 29

In accordance with ICAO Annex 10, the NAVSTAR/GPS global average 95% position accuracy in SPS should be (13) metres horizontally.

Question 30

An SBAS consists of (1/2/3/4) elements.

Answer 30

An SBAS consists of (3) elements. (space, ground, user)

Question 31

The inclination of the NAVSTAR/GPS satellite orbits to the plane of the equator is (23/45/55/56)°​.

Answer 31

The inclination of the NAVSTAR/GPS satellite orbits to the plane of the equator is (55)°.

Question 32

Minimum GBAS plan coverage is (15/25) NM from the landing threshold within (35/45)° apart the final approach path and (10/20)° apart between (15 and 20 / 25 and 30) ​NM.

Answer 32

Minimum GBAS plan coverage is (15) NM from the landing threshold within (35)° apart the final approach path and (10)° apart between (15 and 20) NM.

Question 33

Almanac data containes (precise ephemeris/orbital) data of (the concerning GPS satellite/all satellites in the GPS constellation)​.

Answer 33

Almanac data containes (orbital) data of (all satellites in the GPS constellation).

Question 34

(1/2/3/4) clocks are installed in each NAVSTAR GPS satellite.

Answer 34

(4) clocks are installed in each NAVSTAR GPS satellite.

Question 35

The frequency band of Galileo GNSS is:

• (1 064/1 164) - 1 215 MHz
• 1260 - (1 300/1 360) MHz
• 1559 - (1 591/1 691) MHz

Answer 35

The frequency band of Galileo GNSS is:

• (1 164) - 1 215 MHz
• 1260 - (1 300) MHz
• 1559 - (1 591) MHz