SSR "Avrora-S"

Mode S SSR provides the following operation modes:

• monopulse mode - on the aircraft equipped with ATC RBS and VRL UVD transponders;
• selective operation with the function of mode S Elementary and Extended Surveillance and the possibility of data transmission via up-link - on the aircraft equipped with mode S transponders;
• mode S Extended Surveillance - on the aircraft equipped with ES 1090 MHz equipment.

Mode S SSR contains:

• Dual-Band LVA Antenna;
• Six channel Rotary joint;
• Turning Gear;
• Dual-Band Digital Receiver (redundant);
• Solid State Transmitter (redundant);
• Drive Control (redundant);
• Data processor (redundant);
• BITE;
• Local and Remote Terminals;
• Remotely Controlled Parrot.

Mode S SSR “AVRORA” was designed using modern technological solutions and electronics and meets last requirements to the air situation data sources.

Performance specifications

Parameter name	Airborne Equipment
	ATC RBS	VRL UVD	Mode S	ES 1090 MHz
Coverage:
Range max, km		465		400
Elevation angle, deg			0.3 ... 45
Number of targets		400		200
Surveillance	Standard monopulse		Elementary and Extended	Extended
Resolution:
By range, m	100	100	Absolute	Absolute
In azimuth, deg	0.5	0.7	Absolute	Absolute
Data validity	0.98 per scan		0.99 per scan	0.93 per 1 s
Reliability
MTBF, h			20000