NSSL Researchers use instrumented balloons to collect storm electrical power information because they increase in the storm. [+] Inside the 1980s, NSSL researchers modified a 15-passenger van by mounting a Cross-Chain Loran Atmospheric Sounding System inside of and invented a high-wind start machine for releasing helium-filled balloons in pretty high https://www.thestudentroom.co.uk/revision/symmetrical-fault-analysis-in-distributed-generation-systems