Download or read book The Influence of Radio Brightness Temperature on Solar Flare Prediction written by Alfred E. Reilly and published by . This book was released on 1967 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: An objective technique based on two measured parameters has been developed to determine the probability of occurrence of a solar flare near a sunspot group. The parameters utilized were the size of each sunspot group and the magnitude of an associated radio brightness temperature. Flare, sunspot, and radio data measured daily during the period from April 1962 through October 1966 were used in the study. These data were associated objectively and analyzed statistically. The size of a sunspot group is a significant predictor in itself. This analysis shows that consideration of radio brightness temperature significantly improves the accuracy of solar flare prediction beyond the accuracy that can be achieved by considering only the size of the sunspot group. (Author).
Download or read book The Influence of Radio Brightness Temperature on Solar Flare Prediction written by Alfred E. Reilly and published by . This book was released on 1967 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: An objective technique based on two measured parameters has been developed to determine the probability of occurrence of a solar flare near a sunspot group. The parameters utilized were the size of each sunspot group and the magnitude of an associated radio brightness temperature. Flare, sunspot, and radio data measured daily during the period from April 1962 through October 1966 were used in the study. These data were associated objectively and analyzed statistically. The size of a sunspot group is a significant predictor in itself. This analysis shows that consideration of radio brightness temperature significantly improves the accuracy of solar flare prediction beyond the accuracy that can be achieved by considering only the size of the sunspot group. (Author)
Download or read book An Objective Baseline for Flare Prediction written by Ronald T. Podsiadlo and published by . This book was released on 1972 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: The relationship between various measurable solar parameters and solar-flare occurrence is examined utilizing a comprehensive solar-geophysical data base containing a variety of objectively-correlated solar measurements. The sample covers the period from January 1955 through February 1968 and includes such parameters as solar flares, sunspots, magnetic fields of sunspots, calcium plages and 9.1 cm radio brightness temperatures. A statistical analysis was performed to determine the parameters most useful for the prediction of solar flares 24 hours in advance. Persistence was identified as the single most important flare predictor, with sunspot magnetic classification, 9.1 cm radio brightness temperature, plage brightness and sunspot area also selected as useful predictors. Objective flare probability prediction equations were developed that incorporate all useful predictors simultaneously. (Author).
Download or read book An Objective Baseline for Flare Prediction written by Ronald T. Podsiadlo and published by . This book was released on 1972 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The relationship between various measurable solar parameters and solar-flare occurrence is examined utilizing a comprehensive solar-geophysical data base containing a variety of objectively-correlated solar measurements. The sample covers the period from January 1955 through February 1968 and includes such parameters as solar flares, sunspots, magnetic fields of sunspots, calcium plages and 9.1 cm radio brightness temperatures. A statistical analysis was performed to determine the parameters most useful for the prediction of solar flares 24 hours in advance. Persistence was identified as the single most important flare predictor, with sunspot magnetic classification, 9.1 cm radio brightness temperature, plage brightness and sunspot area also selected as useful predictors. Objective flare probability prediction equations were developed that incorporate all useful predictors simultaneously. (Author)
Download or read book A Comparison of Reported Solar Flare Occurrence Times and Flare Patrol Times 1955 1964 written by Ronald T. Podsiadlo and published by . This book was released on 1967 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: A flare event list that is consistent with flare patrol times is prerequisite to a reliable, unbiased estimate of flare occurrence per unit patrol time. A comparison of the flare occurrence times and flare patrol times reported by 52 solar observatories during the period of 1955 to 1964 discloses that 12.3 percent of the flare reports (Importance = or > 1) have no reported patrol coverage. Elimination of these 'unpatrolled' flare reports reduces the number of individual flare events in the data sample by 9.7 percent. This means that flare occurrence per unit patrol time computed from the raw flare and flare patrol data is overestimated by this same percentage. In addition to eliminating 'unpatrolled' flare reports, appropriate adjustments are made in the 'patrolled' flare data so as to make each observatory's reported flare times completely consistent with its reported patrol times.
Download or read book Effect of the Ionosphere on Space and Terrestrial Systems written by and published by . This book was released on 1978 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Compilation of Solar Radio Sweep frequency Observations 1955 1964 written by Hans J. E. Fischer and published by . This book was released on 1968 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The solar radio sweep-frequency observations and hours of patrol from five rad radio observatories for the period 1955 through 1964 have been compiled, edited, and put onto two magnetic tapes. One tape contains the hours of radio patrol from the observatories at Ann Arbor, Bigpine, Boulder, Sydney and Fort Davis. Another tape contains the sweep-frequency observations in the meter and dekameter wavelengths of the radio spectrum from these observatories. The sources, methods of reduction, and the format and content of the data on tape are described. Statistics related to various distributions of the radio spectral activity reported by each station are discussed and demonstrate an urgent need for standard policies in detecting, scaling, classifying, and reporting these data.
Download or read book Solar terrestrial Predictions Proceedings Solar activity predictions written by Richard Frank Donnelly and published by . This book was released on 1979 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Air Force Surveys in Geophysics written by and published by . This book was released on 1967 with total page 94 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 1991 with total page 1460 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Constructing Solar Flare Events by Computer written by Hans J. E. Fischer and published by . This book was released on 1969 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: A computer program has been developed which processes and groups individual observations of solar flares which describe the same feature. From each group of observations a consolidated description of the flare 'event' is produced. The report details the methods by which these groups are formed and the subsequent consolidated descriptions achieved. (Author).
Download or read book High Resolution Solar Radio Activity Investigations written by Ronald M. Straka and published by . This book was released on 1977 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of cm-mm wavelength radio emission from solar active regions to find flare/proton flare predictors was the task of AFGL's In-House Work Unit 46430302, High Resolution Solar Activity Investigations. Using mapping data from several large radio telescopes, the multi-wavelength active region data was evaluated for significant prediction parameters. A statistical examination of 681 solar-region measurements obtained at wavelengths of 9.1 cm (Stanford), 8 mm (AFCRL), and 3 mm (Aerospace) from 1968 to 1970 was made and related to 25 proton events. Of the 21 different correlation parameters evaluated, the apparent 3-mm flux density, particularly when it exceeded 10 s.f.u., provided the best indication that a region would produce a proton flare. Results of the 21 August 1975 proton-flare observations using the 120-ft Haystack radiotelescope at 3.8 cm are discussed. The solar region involved had a low, and decreasing, brightness temperature before it flared, and not the polarization variations often seen prior to flares. The noise power spectrum analysis of active-region temperature and polarization variations is described. A significant power component was found at 43 mHz (23 sec period) in preflare polarization variations; no such component was found for preflare temperature. Recommendations for future areas of investigation using high-resolution solar radio instrumentation are suggested. (Author)
Download or read book Flare Occurrence Tomorrow as a Function of Area and Flariness of Sunspot Today written by Alfred E. Reilly and published by . This book was released on 1969 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: An objective technique has been developed for estimating the probability of occurrence of solar flares in a particular sunspot group using both the size of the sunspot group and its 'flariness'. Tables are given which indicate the probability that at least one flare of importance two or greater will occur tomorrow, given the area and flariness of the sunspot group today. (Author).
Download or read book Solar activity reports written by Richard Frank Donnelly and published by . This book was released on 1979 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Research Papers written by and published by . This book was released on 1969 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Solar and Space Weather Radio Physics written by Bin Chen and published by Frontiers Media SA. This book was released on 2021-07-28 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Solar Flare Prediction written by C. Sawyer and published by . This book was released on 1986 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study looked at observational and theoretical studies of flare physics, at quests for flare precursors, and at mathematical models for combining masses of predictive information. We also looked at the worldwide effort to gather and share timely data and combine it with knowledge and experience to forecast solar flares and their effects. Topics include: Long-lived, large-scale magnetic and velocity fields; Magnetic-energy buildup in an active region; Flare initiation; Flare precursors -- Filament activation, Preflare brightening, Magnetic shear, and Emerging and cancelling magnetic flux; Quantitative prediction; Operational solar flare prediction; Forecast evaluation.
