The satellite compass is a device that uses GNSS, often with two distance separated GNSS receivers, to calculate heading instead of using magnetic or gyroscopic heading.
Accurate heading information is critical to electronic navigation.
While electronic and fluxgate compasses work fine, they’re typically only accurate to 1 to 3 degrees and are subject to polar and magnetic interference.
Instead of using magnetic fields to sense their orientation, satellite compasses employ multiple antennas to determine minute time-stamp differences from received Global Navigation Satellite System transmissions. This information is then used to calculate heading.
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