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The POLAR-300 is a high-end, MEMS-based Air Data and Attitude and Heading Reference System (ADAHRS) and Inertial Navigation System (INS). It is perfect for system integration in avionics packages or other attitude sensing applications. POLAR-300 has proved itself in a variety of highly dynamic environments, giving outstanding results.


Air Data and Attitude and Heading Reference System (ADAHRS) Polar 300
Precision Attitude Estimation

Years of R&D invested in aerospace-grade estimation algorithms have resulted in outstanding precision and robustness.

Compact and Easy to Integrate

Reduced size and weight allows straight forward integration into the user's system.

Exceptional Performance in Highly Dynamic Conditions and Dead Reckoning Navigation

Exceptional navigation and attitude performance are combined in one device to provide robust and accurate dead reckoning navigation in GNSS-denied environments.

Meticulous Calibration Procedures

UAV Navigation's manufacturing facility is equipped with state-of-the-art calibration and setup instruments; all products are subject to the most stringent Quality Control checks.


None of the traditional gimbal-lock problems.

Lightning-fast Data Rates

Latency is minimized by using the highest data report rates from the sensors (critical for advanced control systems).

The POLAR-300 is a high-end, MEMS-based Air Data and Attitude and Heading Reference System (ADAHRS) and Inertial Navigation System (INS). It is perfect for system integration in avionics packages or other attitude sensing applications, and includes:
  • Attitude Heading & Reference System (AHRS).
  • Inertial Measurement Unit (IMU).
  • Inertial Navigation System (INS).
  • Air Data System (ADS).
  • Global Navigation Satellite System (GNSS, including: GPS, Galileo, GLONASS, BeiDou).


POLAR-300 has proved itself in a variety of highly dynamic environments, giving outstanding results:
  • Red Bull Air Race
  • MotoGP onboard 'GyroCam'
  • Reno Air Races.
  • Various UAVs as the onboard ADAHRS for the Customer's own flight control computer.

Redundancy built into the POLAR-300 software allows it to survive individual sensor failures while maintaining accurate estimates of attitude and position. Its high-performance MEMS-based IMU is calibrated and compensated over the full industrial temperature range.

Key features:
  • High accuracy attitude estimation. Precise attitude determination is an essential process for aircraft navigation and control. To achieve outstanding levels of attitude estimation precision, years of research and development of aerospace-grade sensor fusion estimation algorithms have been invested.
  • Redundant IMU.
  • Compact and easy to integrate.
  • Supplied as standard in an aircraft-grade anodized aluminium box.
  • Optionally it can be supplied as an OEM board for direct integration in the Customer's product
  • As a developer and manufacturer of professional grade autopilots, UAV Navigation is committed to the highest aviation standards in terms of product performance, accuracy and reliability. UAV Navigation's manufacturing facility is equipped with state-of-the-art calibration and measurement tools and all products which leave the facility must pass exhaustive Quality Control checks. Repeatability is key. All equipment and tools used during manufacture, calibration and Acceptance Testing Protocol (ATP) comply with UAV Navigation's strict Quality Policy
  • Combines exceptional navigation and attitude performance device in a wide range of high dynamics conditions and GPS-denied dead-reckoning navigation.
  • Quaternion-based solution. Avoiding the gimbal-lock problems found in traditional systems.
  • High data report rates from the sensors in order to reduce the latency. This is a critical requirement in advanced control systems.
  • It is used as the onboard sensor suite inside UAV Navigation's VECTOR autopilot

Online sensor diagnostics
Sensor failure tolerance
All single, several multiple
Over 60462 h
Serial comm
RS-232, RS-422, RS-485. Up to 3Mbps
CAN (capability available from early 2017)*
1Mbps A and B
*Available under request.
Voltage Supply (unregulated)
9V to 36V DC
Power consumption
Multi-constellation GNSS capability
  • 72-channel receiver
  • GPS L1C/A
  • SBAS L1C/A
  • QZSS L1C/A
  • BeiDou B1I
  • Galileo E1B/C
Active (for best performance) or passive
Antenna Connector (boxed version)
50 Ohm SMA Female
Antenna power supply
-167 dBm
Time to First Fix
  • Cold Start: 26s
  • Hot Start: 1s
Navigation Update Rate
  • Single GNSS: up to 10 Hz
  • Concurrent GNSS: up to 5 Hz
Velocity Accuracy
0.05 m/s
Heading Accuracy
0.3 degrees
Horizontal Position Accuracy
2 m
Accuracy of Time Pulse Signal (RMS)
30 ns
Frequency of Time Pulse Signal
PPS signal can be configured by the user (default: 1 pps)
Operational Limits of GNSS
  • Dynamics: 4 g
  • Altitude: 50,000 m
  • Velocity: 500 m/s
Airspeed Ranges
15-220 kt
(High Speed version is also available: 43-450 kt)
-2.000 ft to +36.000 ft AMSL
Altimeter Accuracy
50 ft
Altimeter Resolution
0.5 ft
Sampling rate
1 kHz
Accelerometers range
+/-8 g (all axis), +/-15 g under request
3dB Bandwidth
400 Hz
0.52 mg/√Hz
Gyro range
+/- 300 º/s (all axis)
3dB Bandwidth
77 Hz
0.015 °/s /√Hz
Internal Magnetometer
3 axis (possibility to connect external magnetometer, e.g. MG01)
Magnetometer attitude compensation
Full scale range
+/- 1000 uT
0.10 uT
Maximum applied magnetic/field
100,000 uT
Roll, pitch, yaw range

Continuous unrestricted

Pitch & Roll error
< 0.5º
Heading error
< 1º
3m CEP with GPS and WAAS/EGNOS available
<30 m/min (continuous, not first minute only)

* 1σ precision in single cylinder piston powered UAV standard flight, with full sensor suite operational. Values are valid for internal and external magnetometer operation.

Size (mm, H x W x L)
  • Boxed: 22 x 40 x 82
  • OEM: 14 x 36 x 51
  • Boxed: 76g
  • OEM: 17g
Humidity (boxed only)
Up to 90% RH, non-condensing
Temperature range
-40ºC to +85ºC
Up to 59000 ft AMSL
Shock survival
500g 8ms 1/2 sine
Mating Connector (boxed only)
MICRO-D Type Male 15-pin


POLAR-300 Kit

UAV Navigation offers the POLAR-300 Kit to enable evaluation of the POLAR-300 product by Customers.

The Kit includes a POLAR-300 unit along with a POLAR-300 Break Out Board (BOB) to allows the user to access all the available POLAR-300 Inputs and Outputs.

Name Kit Contents

POLAR-300 Kit

  • POLAR-300 unit
  • POLAR-300 Breakout Board
  • Antenna Tallysman 33-2410-00-5000 and connector


POLAR-300 for FCC

POLAR-300 for Flight Control Computers (FCC)

POLAR-300 is a compact and lightweight device designed to provide reliable and accurate data stream from our tested and optimized attitude and heading reference system to SATCOM, camera gimbal or third-party Flight Control Computers (FCC).











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UAV Navigation is a privately-owned company that has specialized in the design of flight control solutions for Unmanned Aerial Vehicles (UAVs) since 2004. It is used by a variety of Tier 1 aerospace manufacturers in a wide range of UAV - also known as Remotely Piloted Aircraft Systems (RPAS) or 'drones'. These include high-performance tactical unmanned planes, aerial targets, mini-UAVs and helicopters.