Two M8N GPS Modules in EKF or One CUAV NEO 3 (M9N) - Which will give better accuracy?

ArduCopter Copter 4.0
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Hi,

I’m trying to get the best positioning accuracy without using RTK GPS.

Cuav claims that their NEO 3 M9N GPS gets up to 35 satellites when regular M8Ns get 15-20.

In the other hand, I can also use two regular M8Ns. Like multiple Radiolink SE100 or something.

I know that ArduPilot kalman-filters multiple GPS’ position data.

Which one would perform better, two M8Ns or one M9N.

Thanks.

1 Like
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The M9 is an excellent chip, and handily beats the M8. I would go with a single M9. Matek also makes an M9. We use dual mRo Location 1.

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If you don’t mind , ask one thing ?

Can you show some footage with

On this project ? I want to show accuracy with some wind or something similar

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What board do you use? How do you plug two CAN Bus GPS?

Is it possible to wire two M9Ns? Can you use a splitter just as in i2c?

I’m using a Pixhawk 2.4.8

Thanks.

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Good day, as you fc have only one CAN port you can connect only one CAN periph, in case you want add one more CAN periph, you can use a splitter, i don’t know if the i2c splitter can handle the signal as well…, me I’ve designed a CAN splitter who can handle the CAN impendace required by CAN BUS protocol