CMA-2012 Doppler Velocity Sensor and Navigation System

• Provides self-contained velocity measurement and navigation capabilities for helicopters.
• Excellent hover performance over water.
• Great insensitivity to precipitation or dust.
• Excellent performance over all speed/attitude ranges.

The CMA-2012 is the most accurate and reliable Doppler Velocity Sensor (DVS) on the market and is the result of CMC Electronics’ 40-year history of building airborne Doppler sensors and navigation systems.

A DVS is an airborne radar used to continuously measure the velocity of an aircraft with regards to its 3 axes (i.e. front-aft, left-right and up-down). The CMA-2012 utilizes Frequency Modulated/Continuous Wave transmission, a technique pioneered by CMC, offering the advantage of lower complexity, higher reliability and simpler maintenance over any other competing modulation technique.

The CMA-2012 is most successfully used for Search and Rescue (SAR) and Anti-Submarine Warfare (ASW) applications, because it measures the velocity of the helicopter with respect to the water surface. Hence, a helicopter can precisely track a moving object carried by water current or tide, without increasing pilot workload. This is an important feature related to rescue crew safety.

The CMA-2012 can provide navigation sensor functions, and compute present position and other navigation information. Unlike a GPS receiver, it is a totally self-contained sensor which is not susceptible to jamming, spoofing, masking or dual point failure. It also provides accurate attitude information for fire control and weapons delivery.

Because of its performance and low weight, the CMA-2012 has been selected for the Eurocopter Tiger Attack Helicopter, the Bell Helicopter 412 “UTTH” for the Canadian Army, AgustaWestland EH-101 for SAR missions as well as for several other programs.

Fifth Generation Doppler Navigation Systems

• Airborne radar providing self-contained precision navigation capability utilizing Doppler-derived measurements of aircraft velocity.
• Meets all requirements of Tactical Navigation, Search and Rescue (SAR), Anti-Submarine Warfare (ASW) and Maritime Patrol Aircraft.
• Multi-LRU system compatible with most analog and digital architectures.
• Output of aircraft velocity to AFCS enables hover manoeuvres or automatic approach to hover.

CMC Electronics has been active in the field of Doppler Velocity Sensor and Navigation Systems (DNS) since 1952. The CMC fifth generation DNS uses proven technologies such as fixed antennas and digital processing.

Doppler radar directly measures aircraft velocity relative to the earth's surface in the three axes, offering a totally self-contained velocity measurement and navigation capability. Our DNS utilizes FM/CW transmission, a technique pioneered by CMC Electronics, which offers the advantage of lower complexity, higher accuracy and reliability than any other competing modulation technique. The antenna-referenced velocities are transformed into earth-referenced velocity components using pitch and roll information from other subsystems.

A proven interface offers a significant reduction in pilot navigation workload and enables special-purpose navigation functions such as search patterns and tactical navigation to be implemented with a very simple operating procedure. The DNS can also be linked to Electronic Flight Information Systems (EFIS). The CMC DNS is available for helicopter and aircraft configurations.

The helicopter DNS is tailored to meet all navigation requirements to Anti-Submarine (ASW) and Tactical Warfare helicopters. These systems can operate to an altitude of 15,000 ft (5,000 m) above terrain and can be optimized for over water or nap-of-the-earth (NOE) operations.

The fixed-wing DNS has been designed to meet the mission systems requirements of transport and P-3C maritime patrol aircraft. These systems can operate to an altitude of 50,000 ft (15,000 m) above terrain, with forward velocities of up to 500 knots.

In all cases, the design approach allows system functions to be tailored to specific customer requirements, and the electrical interface characteristics can be supplied for specific aircraft avionics and subsystems for additional enhancement of system capability.

CMC's DNS have been fielded on a host of aircrafts comprising:

• AN/APN-208/CMA-708B/C: Augusta AB-212, AB-212ASW, A-109, ASH-3D, AS-61, AB-412, AB-205 and AB-206, Lockheed MC-130E (CMA-880), Piaggio P.166DL3, Casa C-212, De Havilland Twin-Otter and Eurocopter SA-330 Puma
• AN/APN-221: Sikorsky HH-53B/C/H and Lockheed C-130
• AN/APN-235: Sikorsky HH-60A/D
• AN/APN-227: Lockheed P-3C
• AN/APN-510: Lockheed CP-140
• AN/APN-513: Sikorsky CH-124A Sea King
• CMA-806A/B: Sikorsky CH-53, Sea King Mk41 and Bell UH-1D