Archangel Systems, Inc.

Archangel Systems, Inc.

1635 Pumphrey Avenue Auburn, AL 36832 USA

AHR150A/300A Air Data Attitude Heading Reference System

AHR150A/300A Air Data Attitude Heading Reference System

The AHR150A and AHR300A represent a paradigm shift in the ADAHRS market. Using MEMS sensors and sophisticated blending algorithms, the AHR150A and AHR300A yield "FOG-grade" performance at greatly reduced size, weight, power, and cost. Several companies, including The Boeing Company and Erickson Air-Crane, have selected the AHR150A for their supplemental type certificates in both rotary- and fixed-wing platforms.

The AHR150A and AHR300A systems consist of two boxes. The AHR150A-1 (or AHR300A-1) Inertial Sensing Unit (ISU) is the rate, acceleration, and air data sensing component while the AHR150A-2 Magnetic Sensing Unit (MSU) is a remote 3 axis magnetic field sensing device. Together, these two units provide a powerful and cost effective alternative to Fiber Optic Gyro systems.

Both the AHR150A and the AHR300A offer similar features, but the rate limit of the AHR150A reaches ±128°/second while the AHR300 reaches ±256°/second. Both products include multiple high- and low-speed ARINC ports, allowing them to integrate seamlessly into any modern avionics suite.


  • Qualified for Mission Critical applications including IFR, SAR, and Primary Flight Systems

  • Certified for Part 23, 25, 27, and 29 aircraft

  • Air data is RVSM compliant

  • Designed with low data latency for fly-by-wire aircraft

  • Mil Spec 38999 filtered connections

  • Angle rate limit of ±128°/second (±256°/second on the AHR300A)
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