Lightning Imaging : Mapping Lightning With Nanosecond Precision

Lightning mapping technology has proven instrumental in understanding lightning. In this work we present a pipeline that can use lightning observed by the LOw-Frequency ARray (LOFAR) radio telescope to construct a 3-D map of the flash. We show that LOFAR has unparalleled precision, on the order of meters, even for lightning flashes that are over 20 km outside the area enclosed by LOFAR antennas (∼3,200 km2), and can potentially locate over 10,000 sources per lightning flash. We also show that LOFAR is the first lightning mapping system that is sensitive to the spatial structure of the electrical current during individual lightning leader steps.

[1]  Ute Ebert,et al.  D20160712T173455.100Z LOFAR lightning flash , 2017 .

[2]  P. Schellart,et al.  Lightning Imaging with LOFAR , 2017 .

[3]  Eric C. Bruning,et al.  Lightning Mapping Array flash detection performance with variable receiver thresholds , 2016, Journal of geophysical research. Atmospheres : JGR.

[4]  A. Corstanje,et al.  Timing calibration and spectral cleaning of LOFAR time series data , 2016, 1603.08354.

[5]  Yang Zhang,et al.  Observations of narrow bipolar events reveal how lightning is initiated in thunderstorms , 2016, Nature Communications.

[6]  M. J. Bentum,et al.  Calibrating the absolute amplitude scale for air showers measured at LOFAR , 2015, 1507.08932.

[7]  M. Uman,et al.  Rocket‐triggered lightning propagation paths relative to preceding natural lightning activity and inferred cloud charge , 2014 .

[8]  M. Stock,et al.  Continuous broadband digital interferometry of lightning using a generalized cross‐correlation algorithm , 2014 .

[9]  J. Dwyer,et al.  The physics of lightning , 2014 .

[10]  H. Edens,et al.  The 2010 eruption of Eyjafjallajökull: Lightning and plume charge structure , 2014 .

[11]  J. Montanyà,et al.  Asymmetries in bidirectional leader development of lightning flashes , 2013 .

[12]  Harald E. Edens,et al.  VHF lightning mapping observations of a triggered lightning flash , 2012 .

[13]  Rob Roebeling,et al.  Cloud property retrievals for climate monitoring: Implications of differences between Spinning Enhanced Visible and Infrared Imager (SEVIRI) on METEOSAT‐8 and Advanced Very High Resolution Radiometer (AVHRR) on NOAA‐17 , 2006 .

[14]  M. P. van Haarlem,et al.  LOFAR: The Low Frequency Array , 2005 .

[15]  P. Krehbiel,et al.  Accuracy of the Lightning Mapping Array , 2003 .

[16]  Jean M. Rüeger,et al.  Refractive Index Formulae for Radio Waves , 2002 .

[17]  Paul Krehbiel,et al.  A GPS‐based three‐dimensional lightning mapping system: Initial observations in central New Mexico , 1999 .