secondary surveillance radar


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Related to secondary surveillance radar: primary radar, ATCRBS

secondary surveillance radar

[′sek·ən‚der·ē sər′vā·ləns ‚rā‚där]
(navigation)
The secondary radar that operates in conjunction with the airborne transponder of the air-traffic control radar beacon system (ATCRBS).

secondary surveillance radar (SSR)

A radar system that requires complementary aircraft equipment (transponder). The transponder generates a coded reply signal in response to transmissions from the ground station (interrogator). Since this system relies on transponder-generated signals rather than signals reflected from the aircraft, as in primary radar, it offers significant operational advantages, such as increased range and positive identification. The interrogator has a fixed interval of two microseconds between pulses P1 and P2, but the position of P3 is variable. There are four modes, or types, of reply allocated for civil; they are designated A, B, C, and D. All secondary surveillance radars operate on the same frequencies; the interrogation is at 1030 MHz and the transponder reply is at 1090 MHz. It also provides automatic altitude reporting facilities as well as other types of information to the ATC (air traffic control) controller. The three main components of the system are the interrogator, a transponder (fitted in the aircraft), and a radarscope. Also called an air traffic control radar beacon system (ATCRBS).
References in periodicals archive ?
This procurement procedure within the Radar Upgrade Sweden project concerns a framework agreement for Mode S Monopulse Secondary Surveillance Radar (Mode-S MSSR) and Primary Surveillance (PSR) systems.
Benefits of installing MSSR Radars Monopulse Secondary Surveillance Radar is state-of-the-art Secondary Surveillance Radar with improved range and detection capabilities deployed for the surveillance of Indian airspace for the purpose of providing Air Traffic Services in India.
Procurement, installation and commissioning of a new Mode S Secondary Surveillance Radar (Mode-S Enhanced Surveillance Ground Station Implementation);
Primary and secondary surveillance radar (PSR/SSR) (including VHF aircraft transmitters, a radar equipment building and a radar tower)
The acquisition regards delivery and installation of 2 Terminal Maneuvering Area (TMA) radar systems each consisting of a Primary Surveillance Radar (PSR) and a Monopuls Secondary Surveillance Radar (MSSR) with military functionalities (mode 1 and mode 2).
The WAM system provides one-second surveillance update, an improvement over secondary surveillance radar s four second update rate.
The companys 50 years of experience in the domain includes the provision of complete air traffic control systems and the supply of primary and secondary surveillance radars, weather radars and operator stations