The team is using forty cars and trucks to chase tornadoes, dropping measuring instruments in their paths.
VOA: special.2009.06.09
Other competitors in the technology sector include: Rudolph Technologies (RTEC), Nanometrics Incorporated (NANO), and Nova MeasuringInstruments (NVMI).
The only instruments capable of measuring such vibrations, though, were spectroscopes--meter-long glass-and-metal optical devices that used infrared light.