> Ground radar is line-of-sight. The Earth is round. Anything below the horizon is invisible.
That's not true. Ground based radar can see over the horizon (hence the term Over-the-horizon radar) by taking advantage of the refractive index of air, allowing the radar waves to essentially curve along, as well as by bouncing radar waves off the ionosphere.
Given that this is the foundation of TFA's argument, it does not instill confidence.
That's not true. Ground based radar can see over the horizon (hence the term Over-the-horizon radar) by taking advantage of the refractive index of air, allowing the radar waves to essentially curve along, as well as by bouncing radar waves off the ionosphere.
Given that this is the foundation of TFA's argument, it does not instill confidence.
https://en.wikipedia.org/wiki/Over-the-horizon_radar