MICROBURST PHENOMENA. I. AURORAL ZONE X-RAYS
High-time resolution x-ray equipment flown from Ft. Churchill, Manitoba, Canada on August 11, 1965 provides evidence for species of auroral zone x-ray microbursts with an asymmetric time profile. These asymmetric microbursts are characterized by a rise of the form 1 - e to the power (-t/tau sub R) w...
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ftdtic:AD0660196 2023-05-15T15:55:07+02:00 MICROBURST PHENOMENA. I. AURORAL ZONE X-RAYS Oliven,N. M. Venkatesan,D. Edwards,P. J. McCracken,K. G. Steinbock,M. IOWA UNIV IOWA CITY DEPT OF PHYSICS AND ASTRONOMY 1967-09 text/html http://www.dtic.mil/docs/citations/AD0660196 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0660196 en eng http://www.dtic.mil/docs/citations/AD0660196 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS Atmospheric Physics (*X RAYS POLAR REGIONS) CANADA BREMSSTRAHLUNG BALLOONS ATMOSPHERIC SOUNDING UPPER ATMOSPHERE ELECTRONS GEOMAGNETISM AURORAE RADIATION MEASURING INSTRUMENTS MAGNETOSPHERE Text 1967 ftdtic 2016-02-18T20:31:28Z High-time resolution x-ray equipment flown from Ft. Churchill, Manitoba, Canada on August 11, 1965 provides evidence for species of auroral zone x-ray microbursts with an asymmetric time profile. These asymmetric microbursts are characterized by a rise of the form 1 - e to the power (-t/tau sub R) where tau sub R is about 30 milliseconds, and a decay of the form of e to the power (-t/tau sub D) where tau sub D is about 200 milliseconds, and a typical peak flux for the largest events of Jo (Ex-ray > 60 keV) of about 100 photons/cm squared sec at 10 g/sq. cm. An episode of these asymmetric bursts was observed in the early morning hours (after 4:30 local time) and an episode of the more common symmetric microbursts began after 9:30 local time. The fast rise times, and the lack of dispersion approximately = or > 10 milliseconds in the x-ray bursts observed at different energies implies restrictions on the nature, and propagation of the parent electron microbursts. (Author) Prepared in cooperation with Calgary Univ. (Alberta), and Southwest Center for Advanced STUDIES( Dallas, Tex., Contract NASr-198. Text Churchill Defense Technical Information Center: DTIC Technical Reports database Canada |
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Open Polar |
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Defense Technical Information Center: DTIC Technical Reports database |
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ftdtic |
language |
English |
topic |
Atmospheric Physics (*X RAYS POLAR REGIONS) CANADA BREMSSTRAHLUNG BALLOONS ATMOSPHERIC SOUNDING UPPER ATMOSPHERE ELECTRONS GEOMAGNETISM AURORAE RADIATION MEASURING INSTRUMENTS MAGNETOSPHERE |
spellingShingle |
Atmospheric Physics (*X RAYS POLAR REGIONS) CANADA BREMSSTRAHLUNG BALLOONS ATMOSPHERIC SOUNDING UPPER ATMOSPHERE ELECTRONS GEOMAGNETISM AURORAE RADIATION MEASURING INSTRUMENTS MAGNETOSPHERE Oliven,N. M. Venkatesan,D. Edwards,P. J. McCracken,K. G. Steinbock,M. MICROBURST PHENOMENA. I. AURORAL ZONE X-RAYS |
topic_facet |
Atmospheric Physics (*X RAYS POLAR REGIONS) CANADA BREMSSTRAHLUNG BALLOONS ATMOSPHERIC SOUNDING UPPER ATMOSPHERE ELECTRONS GEOMAGNETISM AURORAE RADIATION MEASURING INSTRUMENTS MAGNETOSPHERE |
description |
High-time resolution x-ray equipment flown from Ft. Churchill, Manitoba, Canada on August 11, 1965 provides evidence for species of auroral zone x-ray microbursts with an asymmetric time profile. These asymmetric microbursts are characterized by a rise of the form 1 - e to the power (-t/tau sub R) where tau sub R is about 30 milliseconds, and a decay of the form of e to the power (-t/tau sub D) where tau sub D is about 200 milliseconds, and a typical peak flux for the largest events of Jo (Ex-ray > 60 keV) of about 100 photons/cm squared sec at 10 g/sq. cm. An episode of these asymmetric bursts was observed in the early morning hours (after 4:30 local time) and an episode of the more common symmetric microbursts began after 9:30 local time. The fast rise times, and the lack of dispersion approximately = or > 10 milliseconds in the x-ray bursts observed at different energies implies restrictions on the nature, and propagation of the parent electron microbursts. (Author) Prepared in cooperation with Calgary Univ. (Alberta), and Southwest Center for Advanced STUDIES( Dallas, Tex., Contract NASr-198. |
author2 |
IOWA UNIV IOWA CITY DEPT OF PHYSICS AND ASTRONOMY |
format |
Text |
author |
Oliven,N. M. Venkatesan,D. Edwards,P. J. McCracken,K. G. Steinbock,M. |
author_facet |
Oliven,N. M. Venkatesan,D. Edwards,P. J. McCracken,K. G. Steinbock,M. |
author_sort |
Oliven,N. M. |
title |
MICROBURST PHENOMENA. I. AURORAL ZONE X-RAYS |
title_short |
MICROBURST PHENOMENA. I. AURORAL ZONE X-RAYS |
title_full |
MICROBURST PHENOMENA. I. AURORAL ZONE X-RAYS |
title_fullStr |
MICROBURST PHENOMENA. I. AURORAL ZONE X-RAYS |
title_full_unstemmed |
MICROBURST PHENOMENA. I. AURORAL ZONE X-RAYS |
title_sort |
microburst phenomena. i. auroral zone x-rays |
publishDate |
1967 |
url |
http://www.dtic.mil/docs/citations/AD0660196 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0660196 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Churchill |
genre_facet |
Churchill |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/AD0660196 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
_version_ |
1766390456570085376 |