ADSB moving obstacle avoidance

Hello
I have 2 drones and I want to do different missions in the same field using separate Mission Planner. My autopilot is the orange cubepilot.
How can I do obstacles avoidance between the two drones knowing each other’s telemetry data online at 1 Hz?

This sounds like software problem. You may ask this on Ardupilot forum so their developers can answer you.

You may also check Ardupilot wiki
https://ardupilot.org/copter/docs/common-object-avoidance-landing-page.html