Red & Orange circle around copter icon

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I have noticed in latest mission planner (1.3.76) that there is two circle over the copter icon which red and orange. Red is smaller radius and orange have the bigger radius .what does it mean in the mission planner?

It shown when you have ADSB avoidance on. Yellow is the warning red is the danger zone.

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Will it give any real time additional warning when obstacle detected over Copter?.

What about checking the docs?
https://ardupilot.org/copter/docs/common-ads-b-receiver.html

Thank you so much …I will read it.