This study is funded by the National Science Foundation AGS-1048103 and ATM–0813672, and we thank Bradley F. Smull for his interest and support. We also thank Vaisala, Inc. for the loan of the interferometers.
FOR FURTHER READING
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Warner, T. A., 2012: Observations of simultaneous upward lightning leaders from multiple tall structures. Atmos. Res., 117, 45–54, doi:10.1016/j.atmosres.2011.07.004.
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