mssr
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MONOPULSE SECONDARY SURVEILLANCE RADAR WITH MODE S CAPABILITY MSSR-1  Monopulse Secondary Surveillance Radar developed by ELDIS Pardubice, s.r.o.  is a fully modular system, which meets or exceeds ICAO and MARK X recommendations and standards and allows extension according to increasing needs of the customer. Individual modules of the equipment can be used either in new or in older MSSR systems. Radar configuration:  Antenna unit (ASSR)  Antenna switch  Control transponder  Dual interrogator-receiver units (Hot master / standby)  Dual extractors (Hot master / standby)  Maintenance display unit  Control and monitoring system Antenna Unit ASSR The unit is composed from antenna pedestal, drive, antenna frame, and antenna itself. The drive rotate together with the antenna support frame and the antenna. The unit is fitted with two asynchronous motors, the gear-box, the two- or threechannel rotary joint and two azimuth encoders. The following antenna types are available: ASSR-20 - LVA 2 - channel SSR antenna (20 column radiators), ASSR-35 - LVA 3 - channel SSR antenna (35 column radiators). The antenna is composed of a set of vertical column radiators that are fed by a horizontal feeder created by a set of strip power splitters. Each antenna of ASSR series has a main beam (SUM). The ASSR-20 antenna has the DIF and OMEGA beams integrated in the SLS beam. The ASSR-35 LVA antenna has a separate DIF beam, which, together with SUM beam, serve for monopulse computation of target azimuth. This antenna has the OMEGA beam as well, which implements the SLS feature. Interrogator–Receiver Unit MSSR-1 The Interrogator–Receiver Unit is the key component of a MSSR. It contains all the circuits necessary for interrogations generation, reply receiving and processing in individual interrogation modes. The unit includes an extensive BITE internal diagnostics. Thanks to full redundancy of critical subsystems and cross-linked configuration, the system brings enhanced accessibility, including automatic backup switchover features. MSSR-1 is a flexible modular system that allows easy extension of system configuration for additional functions according to requirements for ATC systems (or Air

Interrogator transmitter unit The interrogator transmitter is a twochannel transmitter, while structure of the channels is identical. The receiver channels are fully identical and automatically calibrated. Test signals are joined with output amplitude-detected video signals. During the time when replies are not received or processed, an extensive testing is performed. Extractor unit The Extractor analyzes all received signals and detects individual reply codes and aerial targets. It is composed from the reply detection unit, individual modes processing unit and target correlation unit. Data...