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 […]
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 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 […]
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 (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 […]
An Attitude Heading and Reference System, better known as an AHRS, is a 3-axis sensor system that provides real-time 3D attitude position – pitch, roll, and heading. The primary function then of an AHRS is to provide orientation data. AHRS are designed to replace traditional gyro-based instruments and to provide superior reliability and accuracy. Some […]
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 […]
Welcome and thank you for visiting our new and improved website – www.spartonnavex.com. We are excited for this launch and hope you are as well. This website offers some great improvements for the user experience. Some of those highlights are: Responsive design that adapts for any screen resolution, including mobile Easy, intuitive navigation More streamlined […]
As enhanced versions of our GEDC-6 and DC-4 products, Sparton’s gyro enhanced attitude and heading system, the GEDC-6E and tilt compensated attitude and heading system and the DC-4E have improved in-field calibration algorithms that offer higher accuracy, reduced convergence time and more.
Inertial systems do not recalibrate on their own if the magnetic environment changes. The magnetic environment is unpredictable and depends on so many factors that it would not be practical to have the inertial system perform recalibrations continuously during operation. If the inertial system calibration is performed in a poor magnetic environment, the inertial system measurements will be poor.
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