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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.
The Airports Authority of India is a statutory body working under the Ministry of Civil Aviation, Government of India is responsible for creating, up grading, maintaining and managing civil aviation infrastructure in India. It provides Communication Navigation Surveillance/ Air Traffic Management (CNS/ATM) services over Indian Airspace and adjoining oceanic areas.
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Obesity causes and management and associated medical conditions
ILS
1. ANNAMACHARYA INSTITUTE OF TECHNOLOGY
AND SCIENCES
NEW BOYANAPALLI, RAJAMPETA
A TECHNICAL SEMINOR
ON
INSTRUMENT LANDING SYSTEM
PRESENTED BY
K.DINESH REDDY
14705A0405
II ECE-A
2. OUTLINES
WHATIS ILS
USES OF ILS
ILSELEMENTS
HOWLOCALIZERWORKS
HOWGLIDEPATHWORKS
MARKERBEACONS
ADVANTAGESOF ILS
CONCLUSION
3. WHAT IS ILS
ILS stands for instrument landing system
It has been existence for over 60 years.
But today, it is still the most accurate approach
and landing aid that is used by the airliners.
4. HISTORY OF ILS
The first scheduled passenger airliner to land using ILS
was in 1938.
5. USES OF ILS
The main purpose of ILS is safe landing of
aircrafts
To guide the pilot during the approach and
landing
It is very useful under zero visible conditions
such as rain ,snow and night times .
6. Scheduled service would be impossible
without a way to land in poor weather.
POOR VISIBILITY LANDINGS
7. Localizer and Glide Path antenna located at aircraft
nose receives both signals and sends it to ILS indicator in
the cockpit.
These signals activate the vertical and horizontal needles
inside the ILS indicator to tell the pilot either go
left/right or go up/down.
By keeping both needles centered, the pilot can guide his
aircraft down to end of landing runway aligned with the
runway center line and aiming the touch down.
HOW ILS WORKS
11. HOW DOES LOCALIZER WORKS
Localizer provides theinformation about the position of
the aircraft
Whether it is flyingto the right side of the runway or left
side of therunway or center of the runway
Localizer is locatedat 300mts fromthe runway
Localizer is operated at a frequency of 108Mhz-112Mhzs
Localizer transmitts two signals of90hz & 150hz with
same modulation index
12. HOW DOES LOCALIZER WORKS
For example, if an aircraft is flying to the right side of the
runway, the 150hz signal is stronger
If the aircraft is flying to the left side of the runway, the 90hz
signal is stronger
When the aircraft is along the centre line of the runway, the two
signals gets cancelled and zero position indicates on the ILS
indicator
14. HOW GLIDE PATH WORKS
By the help of glide path aircraft is following the correct path
when landing
It is operated at a frequency i.e. 330Mhz
If anaircraft is flying above the glide path, then the 90hz
signal is stronger
If anaircraft is flying belowthe glide path, then the 150hz
signal is stronger
The combination of both localizerand glide path equipment
providessufficient information to the pilot for safe landing
A common indicator is used for both units
17. MARKER BEACONS
Marker beacons are usedfor height checking and
provides distance between aircraft andrunway
Marker beacons are arranged at different points
Each beacon allotted a audio code(tone) to
indicate distance fromthe runway to alert the
pilot for safe landing
18. The most accurate approach and landing aid
that is used by the airliners.
ADVANTAGES OF ILS
19. CONCLUSION :
•Instrument Landing System is necessary for all
airports for safe landing of aircrafts under any
conditions like rain , fog , moisture and during
nights etc.
