New Satellite Engine Could Use Earth's Atmosphere to Stay in Orbit Indefinitely

Very much not a new idea: https://en.wikipedia.org/wiki/Very_low_Earth_orbit

Though fun to see. More interesting than the station keeping (indefinite part) is that it enables ~100km orbits, which are ~5x closer than what remote sensing satellites use today and thus could get 5x the resolution for the same instrument.

The Earth's upper atmosphere is delicate. It's already being disturbed with rocket fuel residue and particulate space junk. Vacuuming up air and ionizing it risks putting the upper atmosphere even more out of balance.

'contactless, neutralizer-less radio-frequency (RF) helicon plasma thruster'

fairly sure that wins just on the absolute impossibility of creating an acronym , just all business

works in wind tunnel testing.