Altitude Limits for Trigger Zones

Is there a way to set it up in the mission editor to allow altitude to be a factor in a trigger zone. I would like to limit the trigger zone to only trigger if aircraft are above 500ft as an example. I'm working on a mission I would like to employ this in. I've tried flags on & off and changing value of the flag if above a certain altitude, but can't get anything to work. Once I add items to the conditions it simply doesn't work. This is what I want to do, place red aircraft ready to start if blue enters trigger zone if it's above 500ft, so you can slip in and kill a radar unit and shut down all other red aircraft on the map. I want to swoop in under 500ft and kill the radar so it can't warn others of the intrusion. Thanks for the help if any......

Set as condition UNIT's ALTITUDE HIGHER THAN:

ONCE > UNIT's ALTITUDE HIGHER THAN and UNIT INSIDE ZONE > GROUP ACTIVATE

Pretty sure I tried that and it worked as long as there were no other aircraft. I tried this on the NTTR map, but the mission in on the Persian Gulf map. I'm going to set everything up on that map for the experiment. Will let you know what the results are.

As you want 500 feet, be sure to use AGL ALTITUDE, rather than just ALTITUDE, as the latter is MSL.

So I set it up so the target radar is at 0 ft elevation and a trigger zone representing the EWR's detection range. While it worked, the altitude in the condition doesn't work at 500 ft. It only detected me once I broke 1800 ft.

I tried both AGL and just altitude, same result.

I'm going to try a different aircraft and see what the results will be.

So I set it up so the target radar is at 0 ft elevation and a trigger zone representing the EWR's detection range. While it worked, the altitude in the condition doesn't work at 500 ft. It only detected me once I broke 1800 ft.

 

I tried both AGL and just altitude, same result.

Unless I’m misunderstanding you, the EWR’s detection ability is limited by line-of-sight. So range and terrain will determine detection altitude, not the trigger zone.

So I set it up so the target radar is at 0 ft elevation and a trigger zone representing the EWR's detection range. While it worked, the altitude in the condition doesn't work at 500 ft. It only detected me once I broke 1800 ft.

 

I tried both AGL and just altitude, same result.

500 * ~3 = 1800.

ME triggers work in metric, no matter your settings.

Thanks you very much, that explains it !