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In the rocket triggered lightning experiment of fiscal 1989, researchers observed electromagnetic field changes and UHF electromagnetic radiation accompanying rocket triggered lightning. It was found that no rapid changes corresponding to the return stroke of natural lightning were observed in the electric field changes accompanying rocket triggered lightning. However, continuous currents were present. In the case of rocket triggered lightning to the tower, electromagnetic field changes corresponding to the initiation of triggered lightning showed a bipolar pulse of a relatively large amplitude. In contrast, the rocket triggered lightning to the ground did not have such a bipolar pulse. The UHF radiation accompanying the rocket triggered lightning preceded the waveform portions corresponding to the first changes in electromagnetic fields. The number of isolated pulses in the UHF radiation showed a correlation with the time duration from rocket launching up to triggered lightning. The time interval between consecutive isolated pulses tended to get shorter with the passage of time, just like the stepped leaders of natural lightning.

In the rocket triggered lightning experiment of fiscal 1989, researchers observed electromagnetic field changes and UHF electromagnetic radiation accompanying rocket triggered lightning. It was found that no rapid changes corresponding to the return stroke of natural lightning were observed in the electric field changes accompanying rocket triggered lightning. However, continuous currents were present. In the case of rocket triggered lightning to the tower, electromagnetic field changes corresponding to the initiation of triggered lightning showed a bipolar pulse of a relatively large amplitude. In contrast, the rocket triggered lightning to the ground did not have such a bipolar pulse. The UHF radiation accompanying the rocket triggered lightning preceded the waveform portions corresponding to the first changes in electromagnetic fields. The number of isolated pulses in the UHF radiation showed a correlation with the time duration from rocket launching up to triggered lightning. The time interval between consecutive isolated pulses tended to get shorter with the passage of time, just like the stepped leaders of natural lightning.

269 p. : 22 cm

During the summer of 1961 the electrostatic field of lightning strokes in the frequency range from 0 to 100 cps was recorded. Simultaneously, the distance from the lightning stroke to the recording station was determined by triangulation. This, combined with the electrostatic theory, allows a detailed analysis of the electric field of the lightning stroke. The results of this analysis are discussed.

A fire was burning during the whitebark pine conference at Crater Lake National Park. Started by lightning on July 23, 2006, this fire (Bybee Complex) was managed as “wildland fire use for resource benefits.” Whitebark pine conference field trip. Crater Lake National Park, Oregon. For a summary of this conference see, Proceedings of the Conference Whitebark Pine: A Pacific Coast Perspective, R6-NR-FHP-2007-01: pdfs.semanticscholar.org/e1d5/ef37b3e8f9a80683aa51b682f5f... Photo by: Richard Sniezko Date: August 29, 2006 Credit: USDA Forest Service, Region 6, Umpqua National Forest, Dorena Genetic Resource Center. Source: DRGC digital photo collection; courtesy Richard Sniezko, Cottage Grove, Oregon. Image provided by USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection: www.fs.usda.gov/main/r6/forest-grasslandhealth

Ground-based data collected on lightning monitoring equipment operated by Goddard Space Flight Center at Wallops Island, Virginia, during a storm being monitored by NASA's F-106B, are presented. The slow electric field change data and RF radiation data were collected at the times the lightning monitoring equipment on the aircraft was triggered. The timing of the ground-based events correlate well with events recorded on the aircraft and provide an indication of the type of flash with which the aircraft was involved.

For a summer thunderstorm, for which simultaneous, airborne electric field measurements and Lightning Detection and Ranging (LDAR) System data was available, measurements were coordinated to present a picture of the electric field intensity near cloud electrical discharges detected by the LDAR System. Radar precipitation echos from NOAA's 10 cm weather radar and measured airborne electric field intensities were superimposed on LDAR PPI plots to present a coordinated data picture of thunderstorm activity.

69 p. ; 22 cm

A fire was burning during the whitebark pine conference at Crater Lake National Park. Started by lightning on July 23, 2006, this fire (Bybee Complex) was managed as “wildland fire use for resource benefits.” Whitebark pine conference field trip. Crater Lake National Park, Oregon. For a summary of this conference see, Proceedings of the Conference Whitebark Pine: A Pacific Coast Perspective, R6-NR-FHP-2007-01 here: pdfs.semanticscholar.org/e1d5/ef37b3e8f9a80683aa51b682f5f... Photo by: Richard Sniezko Date: August 29, 2006 Credit: USDA Forest Service, Region 6, Umpqua National Forest, Dorena Genetic Resource Center. Source: DRGC digital photo collection; courtesy Richard Sniezko, Cottage Grove, Oregon. Image provided by USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection: www.fs.usda.gov/main/r6/forest-grasslandhealth

A fire was burning during the whitebark pine conference at Crater Lake National Park. Started by lightning on July 23, 2006, this fire (Bybee Complex) was managed as “wildland fire use for resource benefits.” Whitebark pine conference field trip. Crater Lake National Park, Oregon. For a summary of this conference see, Proceedings of the Conference Whitebark Pine: A Pacific Coast Perspective, R6-NR-FHP-2007-01 here: pdfs.semanticscholar.org/e1d5/ef37b3e8f9a80683aa51b682f5f... Photo by: Richard Sniezko Date: August 29, 2006 Credit: USDA Forest Service, Region 6, Umpqua National Forest, Dorena Genetic Resource Center. Source: DRGC digital photo collection; courtesy Richard Sniezko, Cottage Grove, Oregon. Image provided by USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection: www.fs.usda.gov/main/r6/forest-grasslandhealth

The overall objective was to understand better the physics of in cloud lightning processes that give rise to radiation pulses in the electric field record. The most significant progress made was in the areas of theoretical development and analysis of 1992 data. The fundamental expressions for electric and magnetic fields from an extending lightning channel were shown to be incomplete. Specifically, a different interpretation of the classical electrostatic, induction and radiation components was found and a simpler expression for the far field expression was derived. Electric field reversals were used in inter simultaneous development of multiple in cloud channels. Electric field waveshapes were consistent with point sources for the first 200ns but not necessarily for longer times. Velocities of propagation are shown to vary with repeating processes in an intra-cloud flash. Two return strokes separated by less than a millisecond but both showing fine structure are located in spatially separate channels at ground that joined a common channel higher up. A dart stepped leader retraced the common channel section but became a stepped leader after emerging below cloud base.

Investigations on Lightning Discharges and on the Electric Field of Thunderstorms. Wilson, C Philosophical Transactions of the Royal Society of London. Series A, Containing Papers of a Math. or Phys. Character (1896-1934). 1921-01-01. 221:73–115

Lightning Dan & the Crawdads Feb. 13, 2021 "Lightning Field" Ontario, CA Source: H6 @24/48 Ch L: SBD Ch 2&4: AKG C414B XLS Omni Location: Approx 25’ from stage, 7’ high Transfer: SDHC > Adobe Audition CS6 > TLH Recorded, Transferred, Mastered by Joe Logrippo (aka wharfratjoe) Tagging: Live Show Tagger Set One 01. Aiko Aiko 02. St. Stepehn > 03. Help on the Way > Slipknot! > 04. Foolish Heart > 05. Franklin's Tower 06. Greatest Story Ever Told 07. Dupree's Diamond Blues 08. Peggy-O 09. Sugaree 10. Loose Lucy 11. Feel Like A Stranger Set Two 01. Jam > Big Boss Man 02. Me & My Uncle > Mexicali Blues 03. Brown-Eyed Women 04. The Mighty Quinn (Quinn The Eskimo) 05. Deal 06. Morning Dew 07. U.S. Blues > 08. Not Fade Away Notes Co-Bill: Grampas Grass performed first, Lightning Dan & the Crawdads performed second. Both bands played two sets. ########### Support Live Music Band allows recordings of their live shows. Do NOT sell this recording! Support the band: Go to a show, bring a friend to a show. Purchase the band's official merchandise. Lightning Dan & the Crawdads - https://www.facebook.com/fryedcrawdads

Lightning Dan & the Crawdads Feb. 13, 2021 "Lightning Field" Ontario, CA Source: H6 @24/48 Ch L: SBD Ch 2&4: AKG C414B XLS Omni Location: Approx 25’ from stage, 7’ high Transfer: SDHC > Adobe Audition CS6 > TLH Recorded, Transferred, Mastered by Joe Logrippo (aka wharfratjoe) Tagging: Live Show Tagger Set One 01. Aiko Aiko 02. St. Stepehn > 03. Help on the Way > Slipknot! > 04. Foolish Heart > 05. Franklin's Tower 06. Greatest Story Ever Told 07. Dupree's Diamond Blues 08. Peggy-O 09. Sugaree 10. Loose Lucy 11. Feel Like A Stranger Set Two 01. Jam > Big Boss Man 02. Me & My Uncle > Mexicali Blues 03. Brown-Eyed Women 04. The Mighty Quinn (Quinn The Eskimo) 05. Deal 06. Morning Dew 07. U.S. Blues > 08. Not Fade Away Notes Co-Bill: Grampas Grass performed first, Lightning Dan & the Crawdads performed second. Both bands played two sets. ########### Support Live Music Band allows recordings of their live shows. Do NOT sell this recording! Support the band: Go to a show, bring a friend to a show. Purchase the band's official merchandise. Lightning Dan & the Crawdads - https://www.facebook.com/fryedcrawdads

Journal of Research of the National Bureau of Standards

Journal of Research of the National Bureau of Standards