MSSR is a key component of air traffic surveillance infrastructure providing, as a minimum, the position, track, altitude and identity of co-operating aircraft. With a long tradition of technological development stretching back to the very earliest SSR applications, Raytheon MSSR systems continue to offer the highest probability of detection (Pd), even in severe multipath and reflection environments, together with low false target rate and high operational availability.

Comprising field-proven components configured in a redundant and fault-tolerant architecture, Raytheon MSSR systems offer sufficient target capacity to accommodate predicted volumes of traffic growth. Additionally, the extensive application of ‘gate array’ technology makes Raytheon MSSR systems easy to configure and maintain.

Condor Series 300

The Condor Series 300 MSSR is a cost-effective system, modular by design and consequently configurable (and reconfigurable in the field) to meet any, or all, MSSR, Mode S and IFF Mode 4 requirements.

In addition to conventional SSR, Series 300 systems output Mode S data to support Elementary and Enhanced Surveillance applications. Mode S decoding and processing is conducted in parallel with conventional SSR processing to ensure proven processes are not compromised and that each function can be optimised individually. Compatible with ICAO Level 2 transponders with Mode S Surveillance Identifier (SI) capability, Series 300 Mode S systems offer mixed, and fully configurable, mode interlace patterns providing concurrent detection of Mode S, MSSR and, where appropriate, IFF Mode 4. To ensure IFF Mode 4 interrogations do not interrupt those in other modes, Series 300 interrogators use Super mode to interlace Mode 4 with Modes 1, 2, 3/A and C in a single interrogation period.

Condor European Mode S (EMS)

Developed specifically to meet EUROCONTROL requirements for full Mode S functionality in crowded European airspace, the Condor EMS MSSR interrogator is a high specification (ICAO Level 5), high performance Mode S system with full Extended Length Message (ELM) uplink and downlink capacity and a proven ground station network (interrogator clustering) capability.

Target tracking responsibility within an interrogator cluster is determined by a coverage maps in the Surveillance Control Function (SCF). Raytheon’s SCF solution is integrated into the Condor EMS interrogator, which enhances reliability, eliminates need for external communications processors and satisfies high integrity requirements for data distribution. Condor EMS systems are operational in clustered networks in Germany and The Netherlands, and operating as independent systems in Hungary, Switzerland and the U.K.

Condor MSSR Antennas

Raytheon MSSR antennas are designed for performance, endurance and reliability. The Condor Large Vertical Aperture (LVA) Antenna is suitable for co-mounted or standalone MSSR/IFF applications. Designed to operate in all climatic conditions without a radome, its rigid construction enables it to withstand loads and forces imposed by high winds – up to 161 km/hr operational and 200 km/hr survival – and significant ice coatings. Each of 35 vertical radiating columns has 12 dipoles that are phase and amplitude controlled to maximise target illumination and minimise ground illumination. Isolated splitters within the distribution network ensure that radiating columns are less vulnerable to change in performance because of heavy rain or icing, rendering the antenna fail-soft.

Designed for applications where a larger antenna is unsuitable, the Raytheon Flat Plate Antenna is lightweight, compact and yet rugged in construction. Weighing only 50 kg and with a length of only 4.3 m, the Flat Plate Antenna provides monopulse operation for MSSR, Mode S and IFF Mode 4 applications, both co-mounted and standalone.