How does it work?
A GPS system receives signals from satellites and determines the time differential between these signals to calculate a position. Using two antennas together allows the system to calculate two positions in order to determine a heading. A single antenna GPS system can provide heading only when the system is in forward motion.

GPS is a highly accurate heading reference for an inertial sensor package. It does not need calibration, and our gyros provide a short-term heading reference during GPS outages. This can allow the sensor to maintain an accurate heading even in areas where GPS reception is intermittent. GPS can be an excellent choice for land and aerospace applications, especially when there may be magnetic interference that would degrade the usefulness of a magnetometer.

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