This slideshow was made for an invited talk at a local radio club that took place in early 2013. It introduces the methods of navigation and gives overview on the role of aerodrome and airspace traffic control.
This powerpoint has some copyrighted materials which I don't have copyright for. Please msg/comment to let me know so I can amend/delete it.
This slideshow was made for an invited talk at a local radio club that took place in early 2013. It introduces the methods of navigation and gives overview on the role of aerodrome and airspace traffic control.
This powerpoint has some copyrighted materials which I don't have copyright for. Please msg/comment to let me know so I can amend/delete it.
Instrument Landing System is a system installed in the aeroplanes for a safe landing. This slide includes all the necessary details about the system, components, installations, working, upgradations.
Aviation communication system - TelecomAcadmey.comHamza Arif
Aviation or Air transport system both refers to the activities surrounding air craft and mechanical flights industry. Aircraft includes fixed-wing and rotary-wing types, morphable wings, wing-less lifting bodies, as well as lighter-than-air craft such as balloons and airships.
Instrument Landing System is a system installed in the aeroplanes for a safe landing. This slide includes all the necessary details about the system, components, installations, working, upgradations.
Aviation communication system - TelecomAcadmey.comHamza Arif
Aviation or Air transport system both refers to the activities surrounding air craft and mechanical flights industry. Aircraft includes fixed-wing and rotary-wing types, morphable wings, wing-less lifting bodies, as well as lighter-than-air craft such as balloons and airships.
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3. AIRCRAFT NAVIGATION SYSTEMS INCLUDE –
VHF OMNIDIRECTIONAL RANGE (VOR)
INSTRUMENT LANDING SYSTEM (ILS)
DISTANCE MEASURING EQUIPMENT (DME)
AUTOMATIC DIRECTION FINDERS (ADF)
DOPPLER NAVIGATION SYSTEM
INERTIAL NAVIGATION SYSTEM
4. VHF OMNIRANGE SYSTEM
Electronic navigation system.
It produces 360 usable radials or courses ,any one
of which is radial path connected to the station.
Operation is in the vhf portion of the radio
spectrum.
Frequency range 108 MHz-117.95 MHz
5. BENEFITES
More accurate and precise flying
Reliable
Voice capable
Reduces interference from atmosphere
and precipitation
Navigation info is visually displayed on an
instrument in cockpit called the CDI (course
deviation indicator.)
7. VOR RECEIVING SYSTEMS CONSIST OF
A RECEIVER
VISUAL INDICATOR
ANTENNAS
A POWER SUPPLY
FREQUENCY SELECTOR: USED TO TUNE RECEIVER
TO SELECTED VOR GROUND STATION
INFO FROM THE VOR RECEIVER IS DISPLAYED ON THE
CDI (COURSE DEVIATION INDICATOR).
8.
9. WORKING OF VOR
Info from the VOR receiver is displayed on the CDI
(Course Deviation Indicator).
The vertical needle is used as the course indicator.
Vertical needle also indicates when the aircraft
deviates from the course and
The direction of the aircraft must be turned to attain
the desired course.
10.
11. WORKING OF VOR THROUGH CDI
To-from indicator presents the direction to or from
the station along the omni radial.
When the localizer signals are selected on the
receiver ,the indicator shows the position of the
localizer beam relative to the aircraft and the
direction the aircraft must be turned to intercept the
localizer.
During VOR operation the VOR radial to be used is
selected by rotating the OBS (omni-bearing selector).
OBS is graduated in degrees from 0 to 360.
12. INSTRUMENT LANDING SYSTEM (ILS)
Operates in the VHF portion of the electromagnetic
spectrum
System consists of a runaway localizer, a glide slope
signal, and marker beacons for position location
Localizer equipment produces a radio course aligned
with the centre of an airport runaway. The on course
signals result from the equal reception of two signals;
Blue sector(150 Hz) and yellow sector(90 Hz)
14. The glide slope : assists pilot in making the correct
angle of descent
Glide slope signals are radiated from two antennas
located adjacent to the touchdown point of the
runway.
Info from both localizer and glide slope receivers is
presented to the CDI;
THE COURSE DEVIATION INDICATOR
The vertical needle: localizer information
Horizontal needle : Glide slope information
When both needles are centered, the aircraft is on
course and descending at the proper rate
15. MARKER BEACONS
In connection with the instrument landing system.
signals which indicate the position of the aircraft
along the approach to the runway
Three markers are used in each installation:
Outer marker - the beginning of the approach path
is modulated by a 400 HZ signal, a tone keyed in
long dashes
Middle marker: 3500 ft from the end of the runway
is modulated at 1300 Hz, a higher-pitched tone
16.
17. DISTANCE MEASURING EQUIPMENT(DME)
Constant visual indication of the distance the aircraft
is from a ground station
NOT a true indication of point to point distance as
measured over the ground
Indicates the slant range between the aircraft and
the ground station
18. WORKING OF DME
Transceiver transmits a pair of spaced pulses to the
ground station
Ground station responds with a pulse transmission
on a separate frequency to send a reply to the aircraft
Time elapsed is time between the challenges and
are measured;
Time travel is the distance separating plane and
station.
Distance is indicated in ‘nautical miles’ by a cockpit
instrument
19. Transmitting frequencies are in 2 groups
962 MHz to 1024 MHz
1151 MHz to 1212 MHz
Receiving frequency is between 1025 to 1149 MHz
Aircraft’s DME transceiver is tuned to the selected DME
ground station
20. AUTOMATIC DIRECTION FINDERS
Radio receivers equipped with directional antennas
Used to determine the direction from which signal
are received
Provide controls for manual operation in addition to
automatic direction finding.
Provide a means of fixing the position with
reasonable accuracy.
Operates in low and medium frequency spectra 190
kHz through 1750 kHz.
21.
22. Consists of
Receiver, Loop antenna,
Sense or non-directional antenna,
Indicator and control unit.
Loop antenna rotates through 360 degrees
Receives Max signal strength:
In parallel position with the direction of the
transmitted signal
Reaches the Min when perpendicular to the
transmitted signal position of the loop, is called the
null position
23. Null position of the loop is used for direction finding
Two null positions exist (180 degrees apart)
Loop antenna cannot differentiate, require sense
antenna
Signal strength of the sense antenna is superimposed
with the null antenna
Only one null position of the loop
24. DOPPLER NAVIGATION SYSTEM
Automatically and continuously computes and
displays ground speed and drift angle of an aircraft
without the aid of ground stations, wind estimates
or true air speed data
Does not sense direction as search radar does
Uses continuous carrier wave transmission energy
and determines the forward and lateral velocity
component of the air craft by utilizing the principle
known as DOPPLER EFFECT
25. INERTIAL NAVIGATION SYSTEM
Used on large aircraft as a long range navigation aid
Self-contained system; DOES NOT require any signal
inputs from ground navigational facilities
Derives altitude, velocity, and heading information
from measurement of the aircraft’s accelerations
Two accelerometers are required,
one referenced towards east and other towards north.
The accelerometers are mounted on a gyro stabilized
unit, called the stable platform
Averts the introduction of errors resulting from the
acceleration due to gravity.
26.
27. An inertial navigation system is a complex containing
four basic components :A stable platform which is oriented to maintain
accelerometers horizontal to the earth’s surface.
Accelerometers arranged on the platform to
supply specific components of acceleration
Integrators which receive the output from the
accelerometers and furnish velocity and distance.
A computer which receives signals from the
integrators and changes distance travelled to
position in selected coordinates.
28. RADIO ALTIMETER
Measures the distance from the aircraft to the
ground
Accomplished by transmitting radio frequency
energy to the ground and receiving the reflected
energy at the aircraft
Modern Day: Pulse Type
Altitude determined by measuring time required
for transmitted pulse to hit ground and return.
Indicating instrument gives true altitude of aircraft
Used during landing to determine decision
whether to continue to land or execute climb-out