Using Integrated IMU to Improve GPS Altitude Stability with LC29HBA for Experimental Variometer

Hi everyone,

I’ve searched the forum but couldn’t find a post addressing this specific topic, so I hope it’s okay to ask here.

I’m currently developing an experimental variometer for a model aircraft and plan to use the altitude data provided by the LC29HBA GPS module. In this context, it’s crucial that the altitude readings are both stable and responsive to quick changes.

The LC29HBA includes an onboard IMU, and I’m wondering whether it can help improve the GPS altitude data. Specifically, I would expect the accelerometer to help stabilize the altitude (when there’s no acceleration) and to enhance responsiveness when there are rapid altitude changes.

So my main question is:
• Does the LC29HBA’s firmware already use sensor fusion between the GPS and IMU in a way that would support this application?
• If so, would the two-wheel mode or the four-wheel mode be more suitable for a model aircraft variometer?
• Or is there alternative firmware or software that would be better suited for fusing GPS and IMU data in this context?

Any insights or experiences with this would be greatly appreciated.

Thanks in advance!