Heading Sources

There are several different heading sources available for GNSS Compass. The heading sources can be configured using the Filter Options page in the web UI (see Using the Web User Interface) or in the Manager application (see Using GNSS Compass Manager). It is possible to use multiple heading sources.

Dual Antenna Heading

For devices that support dual GNSS antenna input, this is the heading source that provides the most accurate heading while GNSS is available. Dual antenna heading only works when a good GNSS fix is available to both antennas. It requires a clear view of the sky with minimal nearby sources of interference or multipath.

External Heading

This can be used if there is some other way to derive heading that is external to GNSS Compass. The heading must be supplied to GNSS Compass using the External Heading Packet or an NMEA message, see NMEA Input.

External Magnetometers Packet

Heading can derived using the magnetometers of an additional external Advanced Navigation product to input external magnetometer values. See External Magnetometers Packet for details.