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POLAR-500 - AHRS-IMU + Dual GNSS Compass

POLAR-500 is an excellent Air Data Attitude Heading Reference System (AD-AHRS) for aerial systems. Take advantage of UAV Navigation's extensive experience in the UAV sector. It includes a Dual GNSS Compass and it is capable of providing precise attitude estimation and satellite pointing.

ARINC 429 Output

Azimuth and elevation angles provided through an ARINC 429 standard output.

Excellent for Aerial Systems

Take advantage of UAV Navigation's extensive experience in the UAV sector.

Dual GNSS Compass (DGC)

DGC to accurately estimate the actual heading, under both static and dynamic conditions.

Compact and Easy to Integrate

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

GNSS-denied Navigation

Exceptional navigation and attitude performance in GNSS-denied environments.

Low Power Consumption

Low battery consumption to achieve high autonomy.

UAV Navigation is an industry leader known for designing cutting-edge inertial navigation systems and other navigation solutions for military and commercial Unmanned Aerial Vehicles (UAVs). Since 2004, UAV Navigation has sold over 2,000 systems and accumulated over 60,000 flight hours. One of its most innovative technologies is the POLAR-500, which is a compact AD-AHRS used for pointing and stabilization on Satcom on the Move (SOTM) terminals such as the Aviator UAV 200 or the HGA-600 antennas.

Designed to withstand the toughest conditions, POLAR-500 is a high-end MEMS-based Air Data Attitude Heading Reference System (AD-AHRS) and Inertial Navigation System (INS). Additionally, it contains a dual GNSS compass for more accurate heading estimation.

POLAR-500 AD-AHRS has been tested in a wide variety of dynamic environments, which confirms its ability to deliver outstanding results. It is absolutely immune to individual sensor failures while maintaining an accurate position and attitude estimation. Its performance in GNSS denied environments is outstanding (<30 m/min).

POLAR-500 provides real-time fused sensor data through an RS-232 serial line. This information is critical for other on-board functions such as status sensor telemetry, gimbal stabilization, etc.

Additionally, POLAR-500 is partly compliant with ARINC Characteristic 781, being able to operate as an Antenna Pointing and Stabilization system, with an integrated Air Data Inertial Reference Unit (ADIRU), meaning it can be used along with a satellite communication modem, providing azimuth and elevation angles through an ARINC 429 output to the antenna.

The POLAR-500 includes a POLAR-500 unit in alumnium box, 2xGNSS Antennas and connector.


Key features:
  • High accuracy in attitude estimation. Precise attitude determination is critical for the navigation and control of an aircraft. To achieve outstanding levels of attitude estimation precision, years of research and development of aerospace-grade sensor fusion estimation algorithms have been invested.
  • POLAR-500 is partly compliant with ARINC Characteristic 781, being able to operate as an Antenna Pointing and Stabilization system.
  • Azimuth and elevation angles provided through an ARINC 429 standard output.  
  • Highly immune to individual sensor failures while maintaining accurate position and attitude estimation.
  • Redundant IMU.
  • Compact and easy to integrate.
  • Supplied as standard in an aircraft-grade anodized aluminum box.
  • As a developer and manufacturer of professional-grade autopilots, UAV Navigation is committed to delivering superior services. We maintain the highest industry 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. Moreover, all products which leave the facility must pass exhaustive Quality Control checks. 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 highly dynamic conditions and GNSS-denied dead-reckoning navigation.
  • Accurate heading estimation under both static and dynamic conditions (Dual GNSS Compass).
  • Quaternion-based solution. Avoids the gimbal-lock problems commonly 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.
  • POLAR-500 is the perfect solution for SATCOM on the Move (SOTM) terminals.
  • Compatible with Visionair & Analytics: for Configuration, Real-Time and Post-Analysis.
  • Export to KML. The user can save the log file in KML format to be used in third-parties’ softwares (Google Earth, Excel..).
  • Internal temperature measurement redundancy.
Online Sensor Diagnostics
Sensor Failure Tolerance
All single, several multiple
Telemetry Port (P0)
RS-232. Configuration / Telemetry. 115200 bps.
Telemetry Port (P1)
RS-232. Configuration / Telemetry. 115200 bps.
Antenna Steering Output
ARINC 429. High Speed (100 kbps)
Label 152 - Open Loop Steering Word
Label 144 - Antenna Control Word
Input Voltage
+9V to +36V DC
Power Consumption
<2W (@12 VDC)
Receiver Type
184 Channel, L1C/A, L2C, L1OF, L2OF, E1B/C, E5b, B1I, B2I, L1S
GPS, GLONASS, BeiDou, Galileo, QZSS
Time to First Fix (Cold / Hot)
< 26 s / < 2 s
Altitude / Velocity Limit
80,000 m / 500 m/s
Navigation Update Rate
5 Hz
30 ns RMS, 60 ns 99%
Dual GNSS Compass
Heading Accuracy
< 0.4° Static (DGC Available) / Dynamic
Horizontal Position Accuracy
< 1.5 m (CEP, 50%, 24 h static, -130 dbm, >6 SVs)
Airspeed Ranges
15-220 kt
43 – 450 kt (Under Request)
Airspeed Accuracy
± 3% Reading
Airspeed Precision
± 1 kt
Altimeter  Range
-2.000 ft to +36.000 ft AMSL
Altimeter Accuracy
± 3% Reading
Altimeter Precision
± 1 ft
Sampling Rate (IMU+Attitude)
Up to 500 Hz
± 8 g, all Axes (± 15 g Under Request)
3dB Bandwidth
200 Hz
<0.43 mg/√Hz
± 300 º/s, all Axes
3dB Bandwidth
77 Hz
0.015 °/s /√Hz
Internal Magnetometer
3 Axes (possibility to connect external magnetometer, e.g. MG01)
Altitude Compensation
Full Scale Range
+/- 1000 uT
0.10 uT
Maximum Applied Magnetic/Field
100,000 uT
Pitch & Roll Error
< 0.5º
Heading Error
< 1º
Estimated Position Accuracy
<1.5 m CEP, GNSS & SBAS available
Dead Reckoning Drift
<30 m/min (continuous, not first minute only)
Size (mm, H x W x L)
45 x 68 x 75 mm
Mating Connector
Amphenol MS3112E-16-26P
GNSS Antenna Connector (x2)
50 Ohm SMA Female
Static / Pitot Port Diameter 
3.0 mm
Up to 90% RH, Non-Condensing
Temperature Range
-40 to +85 ºC
Shock Survival
500 g, 8 ms, ½ sine


POLAR-500 Kit

UAV Navigation offers the POLAR-500 Kit to enable evaluation of the POLAR-500 product by Customers.

The Kit includes a POLAR-500 unit along with a POLAR-500 Break Out Board (BOB) to allows the user to access all the available POLAR-500 Inputs and Outputs.

Name Kit Contents

POLAR-500 Kit

  • POLAR-500 unit
  • POLAR-500 Breakout Board
  • 2 x Antenna DGNSS ANN-MB-00-00 and connector

POLAR-500 for Flight Control Computers (FCC)

POLAR-500 is an advanced AHRS ideal for the most demanding applications. This Attitude and Heading Reference System includes a built-in Dual GNSS Compass and ARINC-429 connection, a technical standard predominant in avionics data bus used in aerospace telecoms. The POLAR-500 may be also used as data stream source for a 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.