| 1. Identity statement | |
| Reference Type | Conference Paper (Conference Proceedings) |
| Site | plutao.sid.inpe.br |
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Identifier | J8LNKAN8RW/3AFLDUT |
| Repository | dpi.inpe.br/plutao/2011/09.22.19.11.58 (restricted access) |
| Last Update | 2012:01.30.13.37.06 (UTC) secretaria.cpa@dir.inpe.br |
| Metadata Repository | dpi.inpe.br/plutao/2011/09.22.19.11.59 |
| Metadata Last Update | 2018:06.05.00.01.29 (UTC) administrator |
| Label | lattes: 4161737266837399 1 CamposSabaSchuPint:2011:ObOfNa |
| Citation Key | CamposSabaSchuPint:2011:ObNaCl |
| Title | Observations of natural cloud-to-ground lightning leaders from simultaneous high-speed video recordings and electric field measurements  |
| Format | DVD |
| Year | 2011 |
| Access Date | 2024, Apr. 20 |
| Secondary Type | PRE CN |
| Number of Files | 1 |
| Size | 227 KiB |
| 2. Context | |
| Author | 1 Campos, Leandro Zanella de Souza 2 Saba, Marcelo Magalhães Fares 3 Schulz, Wolfgang 4 Pinto Jr., Osmar |
| Group | 1 DGE-CEA-INPE-MCT-BR 2 CST-CST-INPE-MCT-BR 3 4 DGE-CEA-INPE-MCT-BR |
| Affiliation | 1 Instituto Nacional de Pesquisas Espaciais (INPE) 2 Instituto Nacional de Pesquisas Espaciais (INPE) 3 ALDIS, Austrian Lightning Detection and Information System, Vienna, Austria 4 Instituto Nacional de Pesquisas Espaciais (INPE) |
| Author e-Mail Address | 1 leandro.zanella@gmail.com |
| e-Mail Address | leandro.zanella@gmail.com |
| Conference Name | International Conference on Atmospheric Electricity, 14. |
| Conference Location | Rio de Janeiro |
| Date | 2011 |
| Volume | 1 |
| Book Title | Proceedings |
| Tertiary Type | Paper |
| History (UTC) | 2011-09-23 14:11:20 :: lattes -> secretaria.cpa@dir.inpe.br :: 2011 2012-01-30 13:37:15 :: secretaria.cpa@dir.inpe.br -> administrator :: 2011 2018-06-05 00:01:29 :: administrator -> marciana :: 2011 |
| 3. Content and structure | |
| Is the master or a copy? | is the master |
| Content Stage | completed |
| Transferable | 1 |
| Content Type | External Contribution |
| Version Type | publisher |
| Keywords | Atmospheric Electricity Dart leaders High-speed video Lightning Leaders Lightning Physics Recoil leaders |
| Abstract | The aim of this investigation is to analyze the phenomenology of positive and negative (stepped-, dart- and recoil) leaders observed in natural lightning from simultaneous high-speed video recordings and electric field measurements. For that intent we have used two different high-speed cameras (obtained by two different cameras, Red Lake Motion Scope 8000S and Photron Fastcam 512 PCI, operating at frame rates ranging from 1000 or 8000 frames per second) and two different types of electric field sensors (slow and fast) in addition to data from a lightning locating system (BrasilDat). All the instruments were GPS time synchronized in order to avoid ambiguities in the analysis and allow us to estimate the peak current of and the distance to each flash that was detected by BrasilDat. From these data it is possible to calculate the two-dimensional speed of each observed leader, allowing us to obtain its statistical distribution along with its correlation to other characteristics of the associated flash, such as return stroke peak current, interstroke interval and presence and duration of continuing current after the return stroke initiated by the leader. Also, the availability of electric field data makes it possible to correlate it to the optical characteristics of each leader type, providing us new insights on the microphysics of these phenomena. In the analyzed dataset, the speeds of positive leaders and negative dart-leaders follow a lognormal distribution at the 0.05 level (according to the Shapiro-Wilk test), while the negative steppedleaders have a similar distribution even though according to a relatively weaker test (KolmogorovSmirnov). Unfortunately, due to the range of frame rates reached by the used cameras, only the minimum propagation speeds could be estimated in the recoil leaders that were observed. |
| Area | CEA |
| Arrangement 1 | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > DIDGE > Observations of natural... |
| Arrangement 2 | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > COCST > Observations of natural... |
| doc Directory Content | access |
| source Directory Content | there are no files |
| agreement Directory Content | there are no files |
| 4. Conditions of access and use | |
| Language | en |
| Target File | CamposL.Observations.pdf |
| User Group | lattes secretaria.cpa@dir.inpe.br |
| Visibility | shown |
| Read Permission | deny from all and allow from 150.163 |
| Update Permission | not transferred |
| 5. Allied materials | |
| Next Higher Units | 8JMKD3MGPCW/3EU29DP 8JMKD3MGPCW/3F3T29H |
| Host Collection | dpi.inpe.br/plutao@80/2008/08.19.15.01 |
| 6. Notes | |
| Notes | Informações Adicionais: The aim of this investigation is to analyze the phenomenology of positive and negative (stepped-, dart- and recoil) leaders observed in natural lightning from simultaneous high-speed video recordings and electric field measurements. For that intent we have used two different high-speed cameras (obtained by two different cameras, Red Lake Motion Scope 8000S and Photron Fastcam 512 PCI, operating at frame rates ranging from 1000 or 8000 frames per second) and two different types of electric field sensors (slow and fast) in addition to data from a lightning locating system (BrasilDat). All the instruments were GPS time synchronized in order to avoid ambiguities in the analysis and allow us to estimate the peak current of and the distance to each flash that was detected by BrasilDat. From these data it is possible to calculate the two-dimensional speed of each observed leader, allowing us to obtain its statistical distribution along with its correlation to other characteristics of the associated flash, such as return stroke peak current, interstroke interval and presence and duration of continuing current after the return stroke initiated by the leader. Also, the availability of electric field data makes it possible to correlate it to the optical characteristics of each leader type, providing us new insights on the microphysics of these phenomena. In the analyzed dataset, the speeds of positive leaders and negative dart-leaders follow a lognormal distribution at the 0.05 level (according to the Shapiro-Wilk test), while the negative stepped-leaders have a similar distribution even though according to a relatively weaker test (Kolmogorov-Smirnov). Unfortunately, due to the range of frame rates reached by the used cameras, only the minimum propagation speeds could be estimated in the recoil leaders that were observed.. |
| Empty Fields | archivingpolicy archivist callnumber copyholder copyright creatorhistory descriptionlevel dissemination doi edition editor isbn issn lineage mark mirrorrepository nextedition numberofvolumes orcid organization pages parameterlist parentrepositories previousedition previouslowerunit progress project publisher publisheraddress readergroup resumeid rightsholder schedulinginformation secondarydate secondarykey secondarymark serieseditor session shorttitle sponsor subject tertiarymark type url |
| 7. Description control | |
| e-Mail (login) | marciana |
| update | |