I have been crashing more and more lately just trying to google something. That is the only thing that crashes chrome for me.. Cmon Google, get your own damn search to work with your own damn browser at least.
The surrounding ice around the detector array acts as a scintillator which generates a minute track of light as the particle passes thru the area. That immediately gives directionality, and energy in eV is computed by summing the light response from the entire detector array during that "event".
You're correct this is the same approach as Rossi and others, altho the implementation details are probably slightly different. I think the goal of the NASA experiment is to find out what is actually happening (mentioned in a press release from the NASA Langley director which I can't seem to pull up at the moment) rather than throwing around some buzzwords and trying to sell a product.