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mssr

Product catalog summary

Overview: The Monopulse Secondary Surveillance Radar (MSSR-1) developed by ELDIS Pardubice is a modular system that complies with ICAO and MARK X standards. It is designed for both new and existing MSSR systems and can be expanded to meet customer needs.

Radar Configuration: The system includes several components: Antenna Unit (ASSR), Antenna Switch, Control Transponder, Dual Interrogator-Receiver Units, Dual Extractors, Maintenance Display Unit, and a Control and Monitoring System.

Antenna Unit (ASSR): The antenna unit consists of a pedestal, drive, frame, and the antenna itself. It features asynchronous motors, a gearbox, a rotary joint, and azimuth encoders. Two types of antennas are available: ASSR-20 and ASSR-35, each with specific beam configurations for target azimuth computation.

Interrogator–Receiver Unit: This unit is crucial for generating interrogations and processing replies. It includes internal diagnostics and redundancy for enhanced accessibility and automatic backup. The system is flexible and can be extended for additional functions.

Interrogator Transmitter Unit: A two-channel transmitter with identical receiver channels that are automatically calibrated. It performs extensive testing when replies are not being processed.

Extractor Unit: Analyzes received signals to detect reply codes and aerial targets. It includes a reply detection unit, modes processing unit, and target correlation unit.

Data Processing: The post-processing unit correlates targets, integrates them into target position messages, and performs analysis to cancel garbled replies. It updates the database periodically and validates codes statistically.

Display Unit: Displays radar signals and data on a high-resolution screen. Basic radar functions can be controlled locally or remotely.

System Parameters: The radar operates in the 1030 & 1090 MHz frequency band, with antenna gains of >20 dBi for ASSR-20 and >27 dBi for ASSR-35 LVA. It supports multiple modes up to Mode S level 5, with a range from 0.5 to 256 NM and an operating temperature range of -50°C to +50°C for outdoor parts.

Performance: The system has a minimum input peak power of 62 dBm, resistance to wind speeds of 30/50 m/sec, and a dynamic range of at least 80 dB. It processes a minimum of 125 targets per second with azimuth accuracy of ±0.1°.

Catalog excerpts

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

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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 processing...

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