Pich and her colleagues recently refined the computational strategy needed to figure out what frequencies space-based antennas should use and how much power is needed. However, Pich also found that to disperse all the protons from the region, you'd need a million 15-meter antennas operating for a few years, "which is indeed not feasible in the near future," she said.
Nonetheless, Pich noted, her calculations assume that the waves these antennas generate do not bounce back and forth inside the inner belt. If they do, that could greatly improve their effectiveness, potentially making the strategy possible. A satellite mission would decide the matter one way or another, but there's a lot of engineering work needed to even propose such a mission, she said.
It remains uncertain as to whether removing these radiation belts might have unintended consequences. "At present we don't think there is any downside to not having them, but as with all things geophysical, it is hard to know all the complex interconnections between the various systems and estimate the full effect of removing the radiation belts completely," Bortnik said. "That's the most any of us can really say at the moment."