AN HF SWEEP FREQUENCY STUDY OF THE ARCTIC IONOSPHERE
OBSERVATIONS MADE DURING 1958 AND 1959 USING A SWEEP FREQUENCY, HF, oblique sounder located at College, Alaska, are discussed, and selected groups of echoes are illustrated. Groundscatter is the predominant echo type observed on midlatitude backscatter records, but this is not true in the high latit...
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ftdtic:AD0257534 2023-05-15T15:02:54+02:00 AN HF SWEEP FREQUENCY STUDY OF THE ARCTIC IONOSPHERE BATES,HOWARD F. ALASKA UNIV COLLEGE GEOPHYSICAL INST 1961-04 text/html http://www.dtic.mil/docs/citations/AD0257534 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0257534 en eng http://www.dtic.mil/docs/citations/AD0257534 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS *IONOSPHERE *RADIO WAVES AURORAE DENSITY DIURNAL VARIATIONS ECHO RANGING ELECTRONS HIGH FREQUENCY IONOSPHERIC PROPAGATION MAGNETIC PROPERTIES COMMUNICATION AND RADIO SYSTEMS REFLECTION SCATTERING Text 1961 ftdtic 2016-02-21T17:30:00Z OBSERVATIONS MADE DURING 1958 AND 1959 USING A SWEEP FREQUENCY, HF, oblique sounder located at College, Alaska, are discussed, and selected groups of echoes are illustrated. Groundscatter is the predominant echo type observed on midlatitude backscatter records, but this is not true in the high latitudes. The majority of the scatter echoes from soundings toward geomagnetic north were direct F region scatter of two main types - 1F and constant range echoes. These same echo types were observed from the E region during magnetic disturbances (the slant Es echo corresponds to the 1F echo). These echoes were centered about geomagnetic north on swept azimuth soundings and were produced by scatter near the oblique reflection point in the ionosphere. Thus, the echoes were caused by scatter from irregularities aligned along the geomagnetic field. (Author) Text Arctic Alaska Defense Technical Information Center: DTIC Technical Reports database Arctic |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
*IONOSPHERE *RADIO WAVES AURORAE DENSITY DIURNAL VARIATIONS ECHO RANGING ELECTRONS HIGH FREQUENCY IONOSPHERIC PROPAGATION MAGNETIC PROPERTIES COMMUNICATION AND RADIO SYSTEMS REFLECTION SCATTERING |
spellingShingle |
*IONOSPHERE *RADIO WAVES AURORAE DENSITY DIURNAL VARIATIONS ECHO RANGING ELECTRONS HIGH FREQUENCY IONOSPHERIC PROPAGATION MAGNETIC PROPERTIES COMMUNICATION AND RADIO SYSTEMS REFLECTION SCATTERING BATES,HOWARD F. AN HF SWEEP FREQUENCY STUDY OF THE ARCTIC IONOSPHERE |
topic_facet |
*IONOSPHERE *RADIO WAVES AURORAE DENSITY DIURNAL VARIATIONS ECHO RANGING ELECTRONS HIGH FREQUENCY IONOSPHERIC PROPAGATION MAGNETIC PROPERTIES COMMUNICATION AND RADIO SYSTEMS REFLECTION SCATTERING |
description |
OBSERVATIONS MADE DURING 1958 AND 1959 USING A SWEEP FREQUENCY, HF, oblique sounder located at College, Alaska, are discussed, and selected groups of echoes are illustrated. Groundscatter is the predominant echo type observed on midlatitude backscatter records, but this is not true in the high latitudes. The majority of the scatter echoes from soundings toward geomagnetic north were direct F region scatter of two main types - 1F and constant range echoes. These same echo types were observed from the E region during magnetic disturbances (the slant Es echo corresponds to the 1F echo). These echoes were centered about geomagnetic north on swept azimuth soundings and were produced by scatter near the oblique reflection point in the ionosphere. Thus, the echoes were caused by scatter from irregularities aligned along the geomagnetic field. (Author) |
author2 |
ALASKA UNIV COLLEGE GEOPHYSICAL INST |
format |
Text |
author |
BATES,HOWARD F. |
author_facet |
BATES,HOWARD F. |
author_sort |
BATES,HOWARD F. |
title |
AN HF SWEEP FREQUENCY STUDY OF THE ARCTIC IONOSPHERE |
title_short |
AN HF SWEEP FREQUENCY STUDY OF THE ARCTIC IONOSPHERE |
title_full |
AN HF SWEEP FREQUENCY STUDY OF THE ARCTIC IONOSPHERE |
title_fullStr |
AN HF SWEEP FREQUENCY STUDY OF THE ARCTIC IONOSPHERE |
title_full_unstemmed |
AN HF SWEEP FREQUENCY STUDY OF THE ARCTIC IONOSPHERE |
title_sort |
hf sweep frequency study of the arctic ionosphere |
publishDate |
1961 |
url |
http://www.dtic.mil/docs/citations/AD0257534 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0257534 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Alaska |
genre_facet |
Arctic Alaska |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/AD0257534 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
_version_ |
1766334812898983936 |