The Prediction Of Solar Proton Events Based On Solar Radio Emissions
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| Author | : William E. O'Brien |
| Publisher | : |
| Total Pages | : 68 |
| Release | : 1970 |
| Genre | : Protons |
| ISBN | : |
The short-term prediction of solar proton events based on a distinct U-shaped radio burst signature is verified. The prediction techniques uses peak flux density values of discrete frequency solar radio burst observations in the 100 to 10,000 MHz region. The criteria are applied to all major proton events from 1952 to 1969 and afford almost total success in predicting near-earth particle events that eminated from visible hemisphere regions of the sun. A correlation between U-shaped radio burst signatures and solar proton events as detected by the ATS-1 satellite, during 1967 and 1968, is also shown to be highly successful. Finally, a 'modified' U-shaped criterion is set forth for the accurate short-terms prediction of polar cap absorption events that result in at least a 2.0 dB riometer measurement of absorption. This 'modified' spectral configuration is then correlated with the major absorption events of the current solar cycle and it is found that prediction occurred for all principal PCA events that originated from visible solar hemisphere flares. (Author).
| Author | : Yohsuke Kamide |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 539 |
| Release | : 2007-08-17 |
| Genre | : Science |
| ISBN | : 3540463151 |
As a star in the universe, the Sun is constantly releas- cover a wide range of time and spatial scales, making ?? ing energy into space, as much as ?. ? ?? erg/s. Tis observations in the solar-terrestrial environment c- energy emission basically consists of three modes. Te plicated and the understanding of processes di?cult. ?rst mode of solar energy is the so-called blackbody ra- In the early days, the phenomena in each plasma diation, commonly known as sunlight, and the second region were studied separately, but with the progress mode of solar electromagnetic emission, such as X rays of research, we realized the importance of treating and UV radiation, is mostly absorbed above the Earth’s the whole chain of processes as an entity because of stratosphere. Te third mode of solar energy emission is strong interactions between various regions within in the form of particles having a wide range of energies the solar-terrestrial system. On the basis of extensive from less than ? keV to more than ? GeV. It is convenient satellite observations and computer simulations over to group these particles into lower-energy particles and thepasttwo decades, it hasbecomepossibleto analyze higher-energy particles, which are referred to as the so- speci?cally the close coupling of di?erent regions in the lar wind and solar cosmic rays, respectively. solar-terrestrial environment.
| Author | : John P. Castelli |
| Publisher | : |
| Total Pages | : 50 |
| Release | : 1978 |
| Genre | : Protons |
| ISBN | : |
A catalog of about 118 proton events, 1966-1976, not included in an earlier catalog of 81 events (AFGL TR-77-0081) for the same period is presented. These 118 events combined with the earlier 81 provide the basis for summarizing solar radio burst/high-energy proton correlation and prediction signature work. In the earlier effort, hereafter called Catalog I, the starting point was the identification of all solar radio bursts having the classical U-shape spectrum, and then establishing proton event association for the purpose of devising a reliable 'false-alarm' free predictor of the major proton events (equivalent PCA 2-2. 5dB). In the present effort, the starting point is the identification of all other proton events not included in Catalog I (misses by the U-shape spectrum criteria), and then searching for the establishing solar radio correlations and possible predictions of weaker proton events. There are very few real misses of principal proton events.
| Author | : |
| Publisher | : |
| Total Pages | : 354 |
| Release | : 1970 |
| Genre | : Environmental geology |
| ISBN | : |
| Author | : United States. Congress. Senate. Committee on Commerce. Subcommittee on Oceans and Atmosphere |
| Publisher | : |
| Total Pages | : 316 |
| Release | : 1976 |
| Genre | : Atmosphere |
| ISBN | : |
| Author | : United States. Congress. Senate. Committee on Commerce |
| Publisher | : |
| Total Pages | : 1472 |
| Release | : 1976 |
| Genre | : Legislative hearings |
| ISBN | : |
| Author | : Edward W. Cliver |
| Publisher | : |
| Total Pages | : 62 |
| Release | : 1985 |
| Genre | : Proton flares |
| ISBN | : |
We have reexamined the relationship between U-shaped peak-flux-density microwave spectra and solar proton events for approx 200 large (Sp(> or = 2GHz) > or = 800 solar flux uits (sfu) microwave burst (1965 - 1979). The radio spectra fell into two basic classes: (a) U-shaped with two maxima ( > or = 800 sfu) in the range from 200 MHz to > or = 10 GHz (59 percent of all events), and (b) cutoff spectra with a maximum > or = 800 sfu at f > or = 2 GHz and Sp (200 MHz) 100 sfu (18 percent). Nine percent of the events had intermediate spectra with a maximum or = 800 sfu at f > or = 2 GHz and 100 sfu or = Sp (200 MHz) 800 sfu. We were unable to classify 15 percent of the events because of incomplete data. The associations of the three classes of spectra with Type II (and/or Type IV) meter wavelenght bursts and 10 MeV proton events of any size ( or = 0.01 pr per sq cm per sec per sr) are as follows: U-shaped Type II/IV (90 percent of large microwave bursts with U-shaped spectra are associated with Type II/IV events), protons (77 percent); intermediate Type II/IV (78 percent), protons (73 percent); and cutoff Type II/IV (22 percent), protons (33 percent). These statistics affirm various lines of evidence linking coronal shock waves and interplanetary proton events. They also suggest that the meter wavelength branch of the U-shaped spectrum may be attributable to second phase (vs flash phase) accelerated electrons.
| Author | : Goddard Space Flight Center |
| Publisher | : |
| Total Pages | : 1700 |
| Release | : |
| Genre | : Astronautics |
| ISBN | : |
| Author | : M. J. Rycroft |
| Publisher | : Elsevier |
| Total Pages | : 633 |
| Release | : 2013-10-22 |
| Genre | : Science |
| ISBN | : 1483156079 |
Cospar Space Research, Volume XIX covers the proceedings of the Open Meetings of the Working Groups on Physical Sciences of the 21st Plenary Meeting of COSPAR, held in Innsbruck, Austria, from May 29 to June 10, 1978, focusing on the developments in space research. The contributions concentrate on remote sensing, middle atmosphere, ionosphere, magnetosphere, and materials science in space. The selection first offers information on global development of space research, including weather and climate, material sciences in space, planets, sun, stars, magnetosphere, and high energy astrophysics. The book then takes a look at the spectral characteristics of surface phenomena and their impact on the design of an optoelectronic multispectral system; use of weather satellite data in the evaluation of water resources; and atmospheric and surface radiation balance as identified from satellite data. The compilation discusses the assimilation of non-simultaneous satellite and conventional meteorological data using statistical weights; annual variation and variability of meteorological parameters in the stratosphere and mesosphere; and physical properties affecting the existence of small particles in the mesosphere. The book also focuses on the determination of density scale-height profiles, geomagnetic effects in the exosphere, and gravity waves and tidal winds in the equatorial thermosphere. The selection is a dependable source of data for readers interested in space research.
| Author | : S. Böhme |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 1180 |
| Release | : 2013-12-14 |
| Genre | : Science |
| ISBN | : 3662123827 |
From the reviews: Astronomy and Astrophysics Abstracts has appeared in semi-annual volumes since 1969 and it has already become one of the fundamental publications in the fields of astronomy, astrophysics and neighbouring sciences. It is the most important English-language abstracting journal in the mentioned branches. ... The abstracts are classified under more than hundred subject categories, thus permitting a quick survey of the whole extended material. The AAA is a valuable and important publication for all students and scientists working in the fields of astronomy and related sciences. As such it represents a necessary ingredient of any astronomical library all over the world." Space Science Reviews #1 "Dividing the whole field plus related subjects into 108 categories, each work is numbered and most are accompanied by brief abstracts. Fairly comprehensive cross-referencing links relevant papers to more than one category, and exhaustive author and subject indices are to be found at the back, making the catalogues easy to use. The series appears to be so complete in its coverage and always less than a year out of date that I shall certainly have to make a little more space on those shelves for future volumes." The Observatory Magazine #1
