EASA Feedback Flashcards
Primary Radar operates on the principle of
Pulse Technique
The advantage of the use of slotted antennas in modern radar technology is to:
Virtually eliminate sidelobes, and concentrate more energy in the main beam.
Which of the following lists information required to input a waypoint or ‘Phantom Station’ into a basic VOR/DME-based Area Navigation System?
Radial and distance from a VOR/DME to the waypoint or ‘Phantom Station
Define Modulation
The addition of information onto a radio wave during transmission.
Types of SBAS
EGNOS, GAGAN, MSAS, WAAS
Wide area navigation aids.
Advantage of the GLS over the ILS
More accurate in the vicinity of the airport
RNP vs RNAV
RNP requires on board performance monitoring & alerting, RNAV does not.
What aerials are used in a primary radar system?
One directional antenna both for transmitting and for receiving.
Skip Distance
Range from the transmitter to the first sky wave.
Fading Phenomenon
Occurs at night due to the combination of the sky and ground waves.
The operating principle of a DME is the measurement of the:
Time between the transmission and reception of radio pulses
The maximum range of primary radar depends on:
PRF.
- Remember Runamb
How does primary radar distinguish targets in an azmimuth
Beam width
Frequency of Airborne Wx Radar
9375 MHz - 9.3 GHz
In order to ascertain whether a cloud return on an Aircraft Weather Radar (AWR) is at or above the height of the aircraft, the tilt control should be set to:
2.5 degrees UP.
The code transmitted by a SSR transponder consists of:
Pulses
Phantom Station Errors
When operating at low altitudes close to the limit of reception range from the REFERENCE station
On what data is a VOR/DME Area Navigation system operating in the dead reckoning mode?
TAS from the Air Data Computer; heading from the aircraft compass; the last computed W/V.
Kalman Filtering
Used in the FMC
Compiles together multiple data sources, of different types, to return an estimate better than any one source.
How can receiver clock error be corrected?
Using correction from the clocks of 4 satellites.
Shadowing
May prevent the reception of signals
NAVSTAR/GPS orbital planes
6 orbital planes, 4 satellites in each.
RAIM
It is 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.
The maximum range of a pulse radar is affected by:
Pulse width, transmission frequency, PRP
[ALL OF THESE]
