SEMANA 21/05 A 28/05

a) Frequency or signal

b) Frequency or phase

c) Phase or signal

d) Signal or time

a) Integration of pulses: technique that combines the returns of several pulses instead of
only 1

b) Adaptive threshold: the noise is estimated using noise-only samples and the threshold
is replaced.

c) Frequency of the signal: The noise can be reduced by the spare time between signals.

d) Aand B are correct.

a) Distance and azimuth of targets.

b) Meteorological information.

c) A and B are correct

d) The temperature of the engine.

a) Distance, azimuth, altitude and velocity.

b) Identification of targets and emergency scenarios.

c) A and B are correct.

d) None of above

a) High accuracy

b) Autonomous system

c) Use of real wind instead of estimated wind.

d) All of above

a) Use to be inside aircrafts noise.

b) Is the combination of a secondary surveillance radar (SSR) and Aerodrome
Surveillance Radar (ASR)

c) It is the cheapest kind of aircraft`s radar.

d) None of above

a) It is a result of the development of the sequential lobbing technique.

b) If the target is located off-bore sight, the receiver will receive an amplitude-modulated
signal at the conscan frequency.

c) One of its disadvantages is that due to the potential foes a break lock of the radar can
occur.

d) All of above are correct.

a) Conical scan.

b) Sequential lobing.

c) Monopulse.

d) None of above.

A. A long pulse can have the same bandwidth (resolution) as short pulse if the long
pulse is modulated in frequency or phase.

B. A long pulse can have the same bandwidth (resolution) as short pulse if the long
pulse is modulated just in frequency.

C. A long pulse can have the same bandwidth (resolution) as short pulse if the long
pulse is modulated just in phase.

D. A long pulse can not have the same bandwidth (resolution) as short pulse if the
long pulse is modulated in frequency or phase.

A. This technique use the return from 1 pulse instead of several pulses.

B. This technique combines the returns from several pulses instead of only 1.

C. In this technique the noise is estimated using noise-only samples and the threshold
is replaced.

D. Is not a technique to improve the detection.

A. Integration of pulses

B. Adaptive threshold

C. A and B are true

D. A and B are false

A. It gives distance and azimuth of targets.

B. It does not need on board equipment.

C. It can give meteorological information.

D. All are true.

A. It gives distance, azimuth, altitude and velocity.

B. It gives identification of targets.

C. It uses interrogator (ground based) and transponder (airbone).

D. All are true.

A. Doppler lets you separate things that are moving from things that aren’t.

B. Doppler does not let you separate things that are moving from things that aren’t.

C. Doppler lets you know the temperature of the ground.

D. Doppler lets you know where is your house.

A. Range gating

B. Sequential lobing

C. Conical scan (Conscan)

D. Amplitude comparison monopulse

A. Range gating

B. Sequential lobing

C. Conical scan (Conscan)

D. Amplitude comparison monopulse

A. The radar data processor

B. The modulor task included in the transmitter

C. Synchroniser function integrated into the exciter and the RDP

D. Analogic Signal Modulator

A. It determines the instantaneous altitude of the aircraft above the terrain over the
aircraft is flying.

B. It makes use of the frequency modulated ranging.

C. The transmitted signal consists of a rectangular wave modulation.

D. The transmitted signal consists of a triangular wave modulation.

A. Scans the terrain ahead of it and receives ground returns that are used for
guidance.

B. Scans the terrain ahead of it and receives airborne returns that are used for
guidance.

C. Scans the terrain under it and receives airborne returns that are used for guidance.

D. Scans the terrain under it and receives ground returns that are used for guidance.

A. Radiate in groups of 10

B. Radiate in groups of 5

C. Radiate in groups of 2

D. Radiate independently

A. Does not use electronic switching means to scan the beam

B. Use electronic switching means to scan the beam

C. Use phasing techniques embedded within the design of the antenna to form and
shape the beam

D. Have lower scanning capabilities being less expensive than the ESA.

A. Electronically Scanned Array

B. Electronically Surveillance Array

C. Electronically System Array

D. Electronically Shifter Array

A. Its power.

B. Its efficiency, related with the gain of the antenna.

C. Its ability to resolve very closely espaced objects.

D. None of them.

A. Ground mapping

B. Spotlight Mode

C. Inverse SAR

D. Direct SAR

A. The lines cross at almost 90º. This represents the most accurate fix.

B. The lines cross at a much more acute angle. The result is a larger error ellipse.

C. There are two possible solutions. An ambiguity exists that can only be resolved by using a
further station.

D. All above are corrects.

A. Long Range Navigation

B. Lost Range Navigation

C. Longitudinal Range Navigation System

D. Low Range Navigation

A. A pulsed system with at least 4 stations: 2 Master + 2 slaves

B. A pulsed system with at least 3 stations: 1 Master + slaves

C. A pulsed system with at least 3 stations: 2 Master + 1 slaves

D. A pulsed system with at least 2 stations: 1 Master + 1 slave

A. Means Group Repetition Interval and is unique for each LORAN chain

B. Means Ground Repetition Interval and is similar for each LORAN chain

C. Means Group Repetitive Interval Code and is unique for each LORAN chain

D. None of above.

A. Offers a cheap and accurate navigational means to anyone who possesses a suitable
receiver.

B. Means global navigation satellite systems

C. A and B are corrects

D. None of above

A. B and C are corrects

B. Three segments: control segment, space segment and user segment.

C. The space segment includes the satellite constellation, presently around 25 satellites that
forms the basis of the network.

D. The control segment includes the satellite constellation, presently around 25 satellites that
forms the basis of the network.

A. L1 and L3 Navigation Signals

B. Only L1 Navigation Signals

C. L1 and L2 Navigation Signals

D. Only L3 Navigation Signals

A. Offset between UTC time and atomic clock at satellite

B. Offset between satellite and receptor clocks (tu)

C. Other: measurement from starting time

D. All above and for this reason a fourth satellite is needed.