Recommendation for Dual GNSS Setup with GNSS-Based Yaw

ArduCopter Copter 4.5
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Hi everyone,

We are currently developing a new copter that will be equipped with dual GNSS modules, aiming to enhance yaw accuracy by relying on GNSS-based yaw instead of solely using an IMU-based compass. Our primary goal is to mitigate compass-related errors (magnetic interference, calibration drift, etc.) by leveraging the yaw data derived from dual GNSS.

At the moment, we are using Here 4 modules, which come with integrated magnetometers, accelerometers, and gyros. While these modules perform well, I’m considering alternatives or upgrades that might offer a better balance between performance and cost.

Specifically, I am looking for GNSS modules or solutions that:

  1. Support dual GNSS yaw calculation natively (preferably with high accuracy and minimal setup complexity).
  2. Provide reliable positioning data, while minimizing the dependency on IMU-based heading.
  3. Offer good value in terms of performance vs. price.

Would I be better off using two Here 4 modules, or are there other GNSS products you’ve worked with that offer improved features or better performance for GNSS yaw applications?

Any advice or recommendations based on your experience would be greatly appreciated!

Thanks in advance for your input!