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RoHS Compliance – Inherent Risks and Mitigation Strategies

RoHS Compliant Compasses Sparton RoHS (Restriction of Hazardous Substances) compliant digital compasses are fully compatible with systems that require high-reliability standards due to extreme-environment operating conditions. The materials and chemicals used in the design, assembly, and manufacture of Sparton digital compasses do not exceed the thresholds set forth in the RoHS Directive 2002/95/EC for Lead, […]

Military Targeting Systems and the Development of Inertial Systems

Problem Military targeting systems require maximum accuracy at all times and under all conditions. These systems can be hand-held or mounted on various vehicles or weapons, but they all must perform reliably and consistently in order to meet the needs of the warfighter. Heading and elevation are critical factors in accurate targeting systems. The complex […]

Adaptive Calibration Technology in Digital Compasses and Inertial Systems

Summary: Conventional digital magnetic compasses require a complex and cumbersome “in-field” calibration process. This calibration, commonly referred to as the “Kabuki Dance”, is not embraced by most users including the military and is often performed improperly, incompletely, or sometimes not at all. This results in diminished sensor performance and poor overall accuracy, in targeting and […]

Sparton AHRS Wins Again

Attitude Heading Reference System (AHRS)

Sparton Corporation was recently selected by another major government contractor to be the inertial system supplier for their navigation system. During the selection process, the contractor performed extensive testing of multiple MEMS-based (Micro-Electro-Mechanical Systems) AHRS (Attitude Heading Reference Systems). The Sparton AHRS-8 system achieved the design win, having distinguished itself from the competition by demonstrating […]

What is an IMU?

An Inertial Measurement Unit, commonly known as an IMU, is an electronic device that measures and reports orientation, velocity, and gravitational forces through the use of accelerometers and gyroscopes and often magnetometers. IMUs are a main component of the inertial navigation systems used in aircraft, unmanned aerial vehicles (UAVs) and other unmanned systems, as well […]

The World Magnetic Model and Inertial Sensor Systems

The World Magnetic Model (or WMM) is a large spatial-scale representation of the earth’s magnetic field that impacts the accuracy of compasses, especially Digital Magnetic Compasses (DMCs) – a type of inertial sensor. The WMM is the standard model used for navigation. The model is used by the US Department of Defense, the UK Ministry […]

Sparton Releases Updated Firmware

Improved In-Field Calibration, Superior Performance! Sparton Navigation and Exploration has released new firmware for its industry-leading inertial systems. These firmware upgrades (Version 4.2.10) improve the in-field calibration for Sparton’s AHRS-8, GEDC-6E, and DC-4E. The updated firmware will provide users with the following features: Improved 3D in-field calibration for enhanced accuracy Created a new in-field calibration […]

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