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Hy-wire and fast electric field change measurements near an isolated thunderstorm, appendix CElectric field measurements near an isolated thunderstorm at 6.4 km distance are presented from both a tethered balloon experiment called Hy-wire and also from ground based fast and slow electric field change systems. Simultaneous measurements were made of the electric fields during several lightning flashes at the beginning of the storm which the data clearly indicate were cloud-to-ground flashes. In addition to providing a comparison between the Hy-wire technique for measuring electric fields and more traditional methods, these data are interesting because the lightning flashes occurred prior to changes in the dc electric field, although Hy-wire measured changes in the dc field of up to 750 V/m in the direction opposite to the fair weather field a short time later. Also, the dc electric field was observed to decay back to its preflash value after each flash. The data suggest that Hy-wire was at the field reversal distance from this storm and suggest the charge realignment was taking place in the cloud with a time constant on the order of 20 seconds.
Document ID
19840002624
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Holzworth, R. H. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Levine, D. M. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 4, 2013
Publication Date
August 1, 1983
Subject Category
Meteorology And Climatology
Report/Patent Number
NAS 1.15:85072
NASA-TM-85072
Accession Number
84N10692
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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