Download or read book A Study of the Characteristics of Thunderstorm Cessation at the NASA Kennedy Space Center written by Michael Shawn Hinson and published by . This book was released on 1997-07-01 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: A lightning summary was developed for a 100x100 kilometer area centered at the NASA Kennedy Space Center. Spatial and temporal patterns, and first stroke peak currents were analyzed from 1986-1995. Three thunderstorms were chosen due to their proximity to the Kennedy Space Center (KSC) and examined for their end of storm characteristics. Radar echoes at the -10 deg C and -20 deg C temperature heights were associated with cloud to ground (CG) lightning strike locations from the National Lightning Detection Network. Electric fields were also examined during the same time frame for any correlations. A pattern was observed for the spatial distribution of CG lightning. An inland maximum in ground flash density was observed during the summer months for both negative and positive flashes. The summer months had the lowest percentage positive flashes (2.5%) while the maximum value occurred during the winter (11.4%). Although thunderstorms can occur at any time during the day, the diurnal distribution of lightning flashes showed that the afternoon (2000 UTC) was the time of maximum lightning activity. From a time history of radar echoes, it was found that a 45 dBZ echo, last detected at the -10 deg C temperature height, may be a good indicator of the end of lightning activity. The observed lag times between this lightning termination signature and the end of all CG lightning flashes was 30 min for all three thunderstorms.
Download or read book Characteristics of Decaying Storms During Lightning Cessation at Kennedy Space Center and Cape Canaveral Air Force Station written by Holly Alison Anderson and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: Although most storms experienced gradually decaying flash rates until cessation, two other cessation behaviors also were observed, making flash activity an unreliable indicator of cessation. Trends in composite reflectivity, reflectivity at three temperatures crucial to storm electrification (i.e., 0°C, -10°C, -20°C), storm thickness of 30 dBZ above -10°C, and vertical gradients of reflectivity were analyzed for 20 storms during the 8 min period prior to cessation to determine if any indicated imminent cessation. Results showed substantial variability in the decaying storms. Although these parameters decreased in most storms during the 8 min period, some increased. Distributions of the parameters at the last flash also were considered, but no clearly preferred value was evident at the last flash. Neither the inversion of lightning initiation criteria (e.g., 40 dBZ at -10°C) nor the descent of 45 dBZ below -10°C were found to be a useful indicator of cessation. Previously-documented lightning "bubbles" of LDAR sources were observed and were consistent with pulses in the intensifying updrafts. The last lightning "bubble" signatures were found to precede lightning cessation by ~35 min.
Download or read book Thunderstorm Characteristics of a Cloud to Ground Lightning at the NASA Kennedy Space Center Florida A Study of Lightning Initiation Signatures as Indicated by Doppler Radar written by Michael Gremillion and published by . This book was released on 1998 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt: A summary of lightning characteristics was developed for the NASA Kennedy Space Center (KSC). From a 1989-1996 data set, the spatial patterns, temporal patterns, and first stroke mean peak current were analyzed. Forty five thunderstorms were chosen due to their isolated development over KSC. Forty of the storms representing summer (May through September) airmass, thunderstorms and five storms representing winter were examined for their storm initiation characteristics. Radar reflectivity echoes at the -10, -15, and -20 deg C temperature heights were associated with cloud-to-ground (CG) lightning strike locations from the National Lightning Detection Network. A distinct region of high ground flash densities can be seen over land matching the topography of the KSC coastline. A maximum of values was observed during the summer months for both negative and positive flashes. The absolute magnitude of negative peak currents was found to be higher than positive peak currents in Florida. Although thunderstorms can occur at any time during the day, the diurnal distribution of lightning flashes showed that the afternoon (2000-2200 UTC) was the time of maximum lightning activity. From a time history of radar echoes, it was found that the 30 dBZ echo detected at the -15 deg C temperature height is the best indicator of the beginning of CG lightning activity. The observed median lag time between this lightning initiation signature and the beginning of CG lightning flashes was 15.5 minutes. Other lightning initiation signatures were also examined at all three temperature heights and did not yield as successful results.
Download or read book Thunderstorm Characteristics of Cloud to ground Lightning at the Kennedy Space Center Florida written by Michael Shane Gremillion and published by . This book was released on 1998 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dual polarimetric Radar Characteristics of Convective wind producing Thunderstorms Over Kennedy Space Center written by Cort A. Scholten and published by . This book was released on 2013 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Conference on Probability and Statistics in Atmospheric Sciences written by and published by . This book was released on with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Conference on Applied Climatology written by and published by . This book was released on with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1993 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Master s Theses Directories written by and published by . This book was released on 1997 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Education, arts and social sciences, natural and technical sciences in the United States and Canada".
Download or read book Proceedings of the 1992 International Aerospace and Ground Conference on Lightning and Static Electricity written by and published by . This book was released on 1992 with total page 678 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2008 with total page 868 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Space Shuttle Missions Summary NASA TM 2011 216142 written by Robert D. Legler and published by www.Militarybookshop.CompanyUK. This book was released on 2011-09-01 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: Full color publication. This document has been produced and updated over a 21-year period. It is intended to be a handy reference document, basically one page per flight, and care has been exercised to make it as error-free as possible. This document is basically "as flown" data and has been compiled from many sources including flight logs, flight rules, flight anomaly logs, mod flight descent summary, post flight analysis of mps propellants, FDRD, FRD, SODB, and the MER shuttle flight data and inflight anomaly list. Orbit distance traveled is taken from the PAO mission statistics.
Download or read book International Conference on Radar Meteorology written by and published by . This book was released on 1999 with total page 1000 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA SP written by and published by . This book was released on 1990 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1989 with total page 728 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1986 with total page 1362 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Computers Take Flight A History of NASA s Pioneering Digital Fly By Wire Project written by James E. Tomayko and published by . This book was released on 2000 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
