Radar Stealth: Possible?

I know vision stealth is (mines), but what about radar stealth? Does it exist, and if so, does anyone know how to do it?

Code:

    "recon": {
        "observable": {
            "layer": "surface_and_air",
            "ignore_sight": true,
            "ignore_radar": true
        }
    }

results in a totally invisible unit I think

ok, because my initial tests turned up failing, though I think I might have done it wrong.

Just wanted to make sure it actually existed before I kept trying. By the way, if the unit is in orbit and I want to hide it from the ridiculous celestial radar that sees orbital units in orbital layers, how do I do that?

IE I want to hide it from "layer": "orbital" and "layer": "celestial".

I dunno, I just copy pasted some code I had from murder party. Back then I though this works.
No idea about the layers.

Yes. Look at RCBM T2 stealth bomber.

Here's my code:

Code:

"recon": {
        "observable": {
            "layer": "orbital",
            "ignore_radar": true
        },
        "observer": {
            "items": [
                {
                    "layer": "orbital",
                    "channel": "sight",
                    "shape": "sphere",
                    "radius": 250
                },
                {
                    "layer": "surface_and_air",
                    "channel": "sight",
                    "shape": "sphere",
                    "radius": 250
                }
            ]
        }
    },

Why doesn't this work?

So if you're trying to hide from celestial radar you may have some issues. The celestial radar is a binary mechanic that gives radar sight to all orbital units.

yeah, I turned celestial radar off just as a test, to see if orbital radar could, with a big enough range, see units on other planets, but as far as I can tell, It can't, so that doesn't work either. They really need to improve celestial radar... and/or fix the celestial tag to prevent it from seeing units in orbital layers at least...