Comments about ‘Radar blimp often seen in Utah's west desert a future defense against stealth threats’

Yep.

Stealth aircraft are designed to be stealthy when viewed from head on or below... by ground based radars. When viewed from above the illusion doesn't work as well.

Also, a lot of people think stealth means invisibility. That's not the case at all. Stealth aircraft still generate a radar return, albeit one that is much diminished and harder to discern from background clutter. In combat stealth pilots are trained to fly very carefully through gaps or thin spots in radar coverage. If you get a stealth aircraft within range of multiple radar sources its position can often be triangulated, giving defenders an opportunity to shoot it down.

It's harder to spot, not invisible.