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

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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.

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.

Technical Abstract Bulletin

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Author :
language : en
Publisher:
Release Date : 1980

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 1980 with Science categories.

Scientific And Technical Aerospace Reports

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Author :
language : en
Publisher:
Release Date : 1995

Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Aeronautics categories.

Analysis Of Polar Cap Events

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Author : Fred C. Jonah
language : en
Publisher:
Release Date : 1967

Analysis Of Polar Cap Events written by Fred C. Jonah and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with Polar regions categories.

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.

Government Reports Announcements Index

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Author :
language : en
Publisher:
Release Date : 1981

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 1981 with Science categories.

Accessions List

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Author : Environmental Science Information Center. Library and Information Services Division
language : en
Publisher:
Release Date : 1981

Accessions List written by Environmental Science Information Center. Library and Information Services Division and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with Ecology categories.

Nbs Special Publication

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Author :
language : en
Publisher:
Release Date : 1968

Nbs Special Publication written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Weights and measures categories.

Nuclear Cross Sections And Technology

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Author : Roald A. Schrack
language : en
Publisher:
Release Date : 1975

Nuclear Cross Sections And Technology written by Roald A. Schrack and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with Cross sections (Nuclear physics) categories.