航空电子设备 二次雷达及应答机
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Civil Aviation Flight University of China 2
Secondary Radar and Transponder
NBAA 2003
For civilian aircraft, the original secondary radar system derived from the early military IFF(Identification Friend or Foe) is called the Air Traffic Control Radar Beacon System, or ATCRBS.
Aircrafts that are equipped with transponders receive these interrogations and send back a reply (using the 1090 MHz band).
There are two primary types of interrogations; Mode A and Mode C.
NBAA 2003
Air traffic control assumes great importance in civil aviation. Ground controllers need to talk frequency with the pilots flying in the controlled area.
Ground Radar Display
Civil Aviation Flight University of China 5
Radar Antenna
NBAA 2003
Mode A/C XPDR
Ground Radar Display
Transmitter Receiver
6
NBAA 2003
Primary Surveillance Radar Antenna
Side Lobe Suppression Antenna
Reply (Plane Identification or Altitude,1090MHz)
ATC Radar Transmitter Receiver
Figure 6.1
They communicate with each other using VHF and HF communication systems.
At the same time, the controllers also need to monitor the positions and travellings of airplanes flying within the controlled area.
On the ground, an ATCRBS sensor sends out an interrogation signal (using the 1030 MHz frequency band) from a rotating antenna to aircraft flying in its sector.
Secondary Radar and Transponder
ATCRBS
Nwenku.baidu.comAA 2003
The ATCRBS system is an interrogation-based system that is comprised of a ground-based interrogator and an on-plane transponder.
This is realized with the primary surveillance radar (PSR) and the secondary surveillance radar system (SSR). PSR and SSR form the air traffic control radar surveillance system.
Transmitter Receiver
8
NBAA 2003
9
Secondary Radar and Transponder
Interrogations
NBAA 2003
ATCRBS interrogations consist of three pulses. Two of these pulses constitute the interrogation while a third pulse is added to prevent the transponder from replying to the side of the interrogator antenna from one of the side lobes. This pulse is called the side lobe suppression pulse, SLS.
Civil Aviation Flight University of China 4
Secondary Radar and Transponder
Transponder
NBAA 2003
Interrogation (1030MHz)
Secondary Surveillance Radar Antenna
Secondary Radar and Transponder
NBAA 2003
Secondary Radar and Transponder
二次雷达及应答机
Civil Aviation Flight University of China 1
Secondary Radar and Transponder
Radar Antenna
Ground Radar Display
Transmitter Receiver
7
Interrogation Radar Antenna
Plane AltituNBdAeA 2003 Plane Identification Reply
Ground Radar Display
An enhanced secondary radar system that is replacing the ATCRBS system is called mode S air traffic control radar.
Civil Aviation Flight University of China 3
Secondary Radar and Transponder
NBAA 2003
For civilian aircraft, the original secondary radar system derived from the early military IFF(Identification Friend or Foe) is called the Air Traffic Control Radar Beacon System, or ATCRBS.
Aircrafts that are equipped with transponders receive these interrogations and send back a reply (using the 1090 MHz band).
There are two primary types of interrogations; Mode A and Mode C.
NBAA 2003
Air traffic control assumes great importance in civil aviation. Ground controllers need to talk frequency with the pilots flying in the controlled area.
Ground Radar Display
Civil Aviation Flight University of China 5
Radar Antenna
NBAA 2003
Mode A/C XPDR
Ground Radar Display
Transmitter Receiver
6
NBAA 2003
Primary Surveillance Radar Antenna
Side Lobe Suppression Antenna
Reply (Plane Identification or Altitude,1090MHz)
ATC Radar Transmitter Receiver
Figure 6.1
They communicate with each other using VHF and HF communication systems.
At the same time, the controllers also need to monitor the positions and travellings of airplanes flying within the controlled area.
On the ground, an ATCRBS sensor sends out an interrogation signal (using the 1030 MHz frequency band) from a rotating antenna to aircraft flying in its sector.
Secondary Radar and Transponder
ATCRBS
Nwenku.baidu.comAA 2003
The ATCRBS system is an interrogation-based system that is comprised of a ground-based interrogator and an on-plane transponder.
This is realized with the primary surveillance radar (PSR) and the secondary surveillance radar system (SSR). PSR and SSR form the air traffic control radar surveillance system.
Transmitter Receiver
8
NBAA 2003
9
Secondary Radar and Transponder
Interrogations
NBAA 2003
ATCRBS interrogations consist of three pulses. Two of these pulses constitute the interrogation while a third pulse is added to prevent the transponder from replying to the side of the interrogator antenna from one of the side lobes. This pulse is called the side lobe suppression pulse, SLS.
Civil Aviation Flight University of China 4
Secondary Radar and Transponder
Transponder
NBAA 2003
Interrogation (1030MHz)
Secondary Surveillance Radar Antenna
Secondary Radar and Transponder
NBAA 2003
Secondary Radar and Transponder
二次雷达及应答机
Civil Aviation Flight University of China 1
Secondary Radar and Transponder
Radar Antenna
Ground Radar Display
Transmitter Receiver
7
Interrogation Radar Antenna
Plane AltituNBdAeA 2003 Plane Identification Reply
Ground Radar Display
An enhanced secondary radar system that is replacing the ATCRBS system is called mode S air traffic control radar.
Civil Aviation Flight University of China 3