AAI presentation

SUMMER INDUSTRIAL TRAINING
On
RADAR & Transmission
AT
Airport Authority of India
Made By:
Nalin Dubey
B.Tech(ECE)
130020204016

Contents
 Introduction of Airport Authority of India
 CNS(Communication Navigation and Surveillance)
 RADAR
 S-BAND & L-BAND
 ASMGCS
 Necessity of A-SMGCS
 Transmission Stations
 Recent Developments
 Abbreviations
 Conclusion

Introduction
• AAI is an organization working under the ministry
of civil aviations.
• Formed on 1st April 1995 under the Act of
Parliament.
• Creates, upgrade, maintain & manages civil
aviation infrastructure.
• It provides Air traffic management (ATM) services
over Indian airspace and adjoining oceanic areas.
• It also manages a total of 125 Airports, including 11
International Airports, 8 Customs Airports, 81
Domestic Airports and 25 Civil enclaves at Military
Airfields.

CNS
CNS
Communication
NavigationSurveillance

Communication
• Communication refers to sending, receiving and
processing of information by electronic means.
• In the air the communication takes place using
VHF(Very High Frequency).
• HF(High Frequency) is not that useful for
communication.
Voice
VHF
HF

RADAR-Radio Detection and Ranging
• This system is part of both communication and
navigation of the aircraft. There are different types of
RADAR used in successful transmission of the data
and the communication between the pilot and the
ATC.
Type of RADAR
• S-Band and an L-Band RADAR.
– S-Band RADAR used for the long range communication.
– L-Band RADAR used for the short range detection of the
aircraft.

S-Band & L-Band
S-Band L-Band
It is used in case of long
range data transmission.
It is used to detect any
aircraft in the field.
Frequency Range is: 2-4
GHz
Frequency Range is: 1-2
GHz
It has 60 rpm. It has 15 rpm.
S-Band RADAR gives
information of the flight
with all the information at
every second.
L-Band RADAR just gives a
point on the RADAR.

Surveillance- A-SMGCS(Advance Surface
Movement Guidance Control System)
Surveillance of the CNS System.
• A-SMGCS provides Air Traffic Controllers with a complete picture of
the airport surface in all weather conditions.
• This improves the controller’s situational awareness and increases
the level of safety at the airport.
• The use of sensors (on the aircraft as well as on the ground) is an
advanced method of sensing obstructions on the aircraft taxiway.
• A-SMGCS combines multi-source surveillance data with target
identification and Flight Plan information into a fused system track.
• On the runway and around the field there are 23 RU’s( Remote
Unit) installed that help in monitoring the movement of any
vehicle and the aircraft during the landing and Take off.

Necessity of A-SMGCS
• A-SMGCS is a critical surveillance requirement to know
the aircraft movement on the ground for tower
controller to plan and schedule.
• Usually all runways are visible from the control tower.
However, at times of low visibility, such as fog, rain,
dust, etc., A-SMGCS is essential.
• ATC relies more on surveillance data, rather than visual
information, making A-SMGCS indispensible tool.

ANTENNA
•This is a butterfly antenna that is basically used for the
transmission.
•This is the antenna that was more emphasized on the
transmission side of the data.
•This antenna was present at the Bijwasan Airport Unit.

Transmission Station
• We went to the bijwasan unit to get a closer look at
the transmission of the RADAR signal.
• They told us they used L-Band RADAR.
• They showed us the antenna that was used to
transmit the data at the station in Bijwasan.
• The antenna used is the butterfly antenna.
• The butterfly antenna is basically used for the
transmission.

Recent Developments
• AAI's implementation of Automatic Dependence Surveillance
System (ADSS), using indigenous technology, at Kolkata and
Chennai Air Traffic Control Centers, made India the first
country to use this technology in the South East Asian region
thus enabling Air Traffic Control over oceanic areas using
satellite mode of communication.
• AAI is implementing the GAGAN project in technological
collaboration with the Indian Space Research
Organization (ISRO), where the satellite based system will be
used for navigation. The navigation signals thus received from
the GPS will be augmented to achieve the navigational
requirement of aircraft.

Conclusion
• 4 Weeks of intensive training helped us to
understand the criticality of CNS system.
• Appreciate the Operation and Maintenance of the
CNS to maintain Reliability and Integrity.
• Understand the future challenges and potential for
effective communication systems.
• Opened a window of opportunity to plan developing
future technologies.

Abbreviations
• ATC: Air Traffic Control
• VHF: VERY HIGH FREQUECY
• A-SMGCS: Advance Surface Movement Guidance Control System
• HF: High Frequency
• RADAR: Radio Detection and Ranging
• RU: Remote Unit
• GAGAN: Geo-augumented navigation system
• ISRO: Indian Space Research Organization
• GPS: Global Positioning System
• S-Band:
• L-Band: Low Frequency Band
• CNS: Communication Navigation and Surveillance
• ATM: Air Traffic Management

Conclusion
•I thank Our Faculty, Guides and Instructors at AAI
including the management of AAI for allowing us this
priceless opportunity.
•It was a great experience for me I learnt about the
RADAR and antenna(s).

AAI presentation

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