A Catalog Of Proton Events 1966 1976 Having Non Classical Solar Radio Burst Spectra

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A Catalog Of Proton Events 1966 1976 Having Non Classical Solar Radio Burst Spectra

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Author : John P. Castelli
language : en
Publisher:
Release Date : 1978

A Catalog Of Proton Events 1966 1976 Having Non Classical Solar Radio Burst Spectra written by John P. Castelli and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Protons categories.

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.

A Catalog Of Proton Events 1966 1976 Having Non Classical Solar Radio Burst Spectra

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Author : John P. Castelli
language : en
Publisher:
Release Date : 1978

A Catalog Of Proton Events 1966 1976 Having Non Classical Solar Radio Burst Spectra written by John P. Castelli and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Protons categories.

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.

Peak Flux Density Spectra Of Large Solar Radio Bursts And Proton Emission From Flares

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Author : Edward W. Cliver
language : en
Publisher:
Release Date : 1985

Peak Flux Density Spectra Of Large Solar Radio Bursts And Proton Emission From Flares written by Edward W. Cliver and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Proton flares categories.

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.

Technical Abstract Bulletin

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Author :
language : en
Publisher:
Release Date :

Technical Abstract Bulletin written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on with Science categories.

Government Reports Announcements Index

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Author :
language : en
Publisher:
Release Date : 1979

Government Reports Announcements Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Science categories.

Government Reports Annual Index

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Author :
language : en
Publisher:
Release Date : 1979

Government Reports Annual Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Research categories.

Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.

Using Solar Radio Burst Integrated Fluxes To Predict Energetic Proton Flux Increases

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Author : William R. Barron
language : en
Publisher:
Release Date : 1982

Using Solar Radio Burst Integrated Fluxes To Predict Energetic Proton Flux Increases written by William R. Barron and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Protons categories.

Time-integrated solar ratio fluxes and their association with satellite observed solar energetic proton flux increases have been studied. The time-integration was only of the U-portion of the radio burst flux increase. The best correlations between the integrated radio fluxes and the proton peak fluxes were realized when the radio fluxes were multiplied by the factor exp (-3B), where B is the angular distance, in radians, between the site of the flare and the solar footpoint of the magnetic field connection between the sun and the earth. The solar footpoint positions were determined from the solar wind speed. Two-variate linear regressions were computed using the time-integrated radio fluxes at five discrete radio frequencies in the 606 to 8800 MHz frequency interval and peak proton fluxes at > 10 MeV and > 30 MeV. The higher frequencies of 2695, 4995 and 8800 MHz all correlated better with the > 10 -MeV protons than the lower frequencies. The > 30-MeV protons were even better correlated with the higher frequencies, but correlation with the lower frequencies were poorer. The Total Energy Density, E sub T, of the radio burst, an integration across the frequency interval of the time-integrated radio fluxes at each frequency, was found to be better correlated with the proton fluxes than any of the individual frequencies.

Air Force Surveys In Geophysics

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Author :
language : en
Publisher:
Release Date : 1980

Air Force Surveys In Geophysics written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Geophysics categories.

Almost Necessary Conditions For A Solar Active Region To Produce A Subsequent Polar Cap Absorption Event

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Author : Edward W. Cliver
language : en
Publisher:
Release Date : 1980

Almost Necessary Conditions For A Solar Active Region To Produce A Subsequent Polar Cap Absorption Event written by Edward W. Cliver and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Correlation (Statistics) categories.

Between 1955 and 1976, 133 polar cap absorption (PCA) events with unambigious solar flare associations were observed. Over one-fourth of these events (35/133) originated in solar active regions that had already produced a PCA. More significantly, these 'subsequent' PCA's included 35 percent (26/74) of all the principal greater than or = 2.0 dB) PCA's in this sample. In this paper, we establish quantitative criteria to distinguish between those solar active regions that are likely to produce such subsequent absorption events and those that pose no further threat to high latitude HF or VLF communications. These criteria are based on flare solar disk position and the greater than or = 8800 MHz burst peak flux density.

Solar Terrestrial Predictions Proceedings Prediction Group Reports

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Author : Richard Frank Donnelly
language : en
Publisher:
Release Date : 1979

Solar Terrestrial Predictions Proceedings Prediction Group Reports written by Richard Frank Donnelly and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Ionospheric forecasting categories.