Ionospheric Scintillations and In-Situ Measurements at an Auroral Location in the European Sector
The orbiting HiLat satellite offered a unique opportunity for studying the ionospheric scintillation parameters in relation to the in-situ measurements of ionization density, drift velocity, field-aligned current, and particle precipitation during the sunspot minimum period. This paper discusses the...
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ftdtic:ADA200761 2023-05-15T18:33:55+02:00 Ionospheric Scintillations and In-Situ Measurements at an Auroral Location in the European Sector Basu, Santimay Basu, Sunanda MacKenzie, Eileen Weimer, Dan EMMANUEL COLL BOSTON MA 1988-10-04 text/html http://www.dtic.mil/docs/citations/ADA200761 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA200761 en eng http://www.dtic.mil/docs/citations/ADA200761 Approved for public release; distribution is unlimited. DTIC AND NTIS Atmospheric Physics *IONOSPHERIC SCINTILLATION *AURORAE STATIONS ELECTROMAGNETIC FIELDS IONOSPHERE POLAR REGIONS PROPAGATION REPRINTS MEASUREMENT OPTIMIZATION DYNAMICS PARAMETERS ELECTRON DENSITY MORPHOLOGY PATHS PHASE ALIGNMENT SHORT RANGE(TIME) SPECTRA PRECIPITATION DRIFT PARTICLES SEASONAL VARIATIONS SCALE LENGTH ANISOTROPY SLOPE GEOMETRY IONIZATION SOLAR ACTIVITY HIGH LATITUDES SOLAR CYCLE MAGNETOSPHERE SUNSPOTS SCINTILLATION ION DENSITY VELOCITY COUPLING(INTERACTION) TOTAL ELECTRON CONTENT HILAT SATELLITE AURORAL OVAL PE62101 WUAFGL46430903 Text 1988 ftdtic 2016-02-23T07:16:52Z The orbiting HiLat satellite offered a unique opportunity for studying the ionospheric scintillation parameters in relation to the in-situ measurements of ionization density, drift velocity, field-aligned current, and particle precipitation during the sunspot minimum period. This paper discusses the results of such a morphological study based on observations at the auroral oval station of Tromso, Norway. The dynamics of the spatial and temporal extent of this region are illustrated in the invariant latitude/magnetic local time grid. The geometrical enhancement of scintillations observed during the alignment of the propagation path with the local magnetic L-shell is shown to be the most consistent and conspicuous feature of scintillations in the nighttime auroral oval. The steepening of phase spectral slope in this region is indicative of the presence of L-shell aligned sheet-like irregularities at long scale lengths. The seasonal variational of total electron content (TEC) determined from the differential Doppler measurements of HiLat transmissions is discussed in relation to the in-situ density measurements at 830 km. The results are also utilized to illustrate the dependence of ionospheric structure parameters on short-term variability of solar activity during the sunspot minimum period. Special effort is made to illustrate that the joint study of scintillation/TEC and in-situ parameters provides an insight into the nature of magnetospheric coupling with the high latitude ionosphere. Keywords: Amplitude and phase scintillations; Total electron content; In-situ density; Auroral oval; Sunspot cycle variation; Irregularity anisotropy; Reprints. Pub. in AGARD Conference Proceedings, n419 p50-1 thru p50-12 May 1987. Text Tromso Tromso Defense Technical Information Center: DTIC Technical Reports database Norway Tromso ENVELOPE(16.546,16.546,68.801,68.801) |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Atmospheric Physics *IONOSPHERIC SCINTILLATION *AURORAE STATIONS ELECTROMAGNETIC FIELDS IONOSPHERE POLAR REGIONS PROPAGATION REPRINTS MEASUREMENT OPTIMIZATION DYNAMICS PARAMETERS ELECTRON DENSITY MORPHOLOGY PATHS PHASE ALIGNMENT SHORT RANGE(TIME) SPECTRA PRECIPITATION DRIFT PARTICLES SEASONAL VARIATIONS SCALE LENGTH ANISOTROPY SLOPE GEOMETRY IONIZATION SOLAR ACTIVITY HIGH LATITUDES SOLAR CYCLE MAGNETOSPHERE SUNSPOTS SCINTILLATION ION DENSITY VELOCITY COUPLING(INTERACTION) TOTAL ELECTRON CONTENT HILAT SATELLITE AURORAL OVAL PE62101 WUAFGL46430903 |
spellingShingle |
Atmospheric Physics *IONOSPHERIC SCINTILLATION *AURORAE STATIONS ELECTROMAGNETIC FIELDS IONOSPHERE POLAR REGIONS PROPAGATION REPRINTS MEASUREMENT OPTIMIZATION DYNAMICS PARAMETERS ELECTRON DENSITY MORPHOLOGY PATHS PHASE ALIGNMENT SHORT RANGE(TIME) SPECTRA PRECIPITATION DRIFT PARTICLES SEASONAL VARIATIONS SCALE LENGTH ANISOTROPY SLOPE GEOMETRY IONIZATION SOLAR ACTIVITY HIGH LATITUDES SOLAR CYCLE MAGNETOSPHERE SUNSPOTS SCINTILLATION ION DENSITY VELOCITY COUPLING(INTERACTION) TOTAL ELECTRON CONTENT HILAT SATELLITE AURORAL OVAL PE62101 WUAFGL46430903 Basu, Santimay Basu, Sunanda MacKenzie, Eileen Weimer, Dan Ionospheric Scintillations and In-Situ Measurements at an Auroral Location in the European Sector |
topic_facet |
Atmospheric Physics *IONOSPHERIC SCINTILLATION *AURORAE STATIONS ELECTROMAGNETIC FIELDS IONOSPHERE POLAR REGIONS PROPAGATION REPRINTS MEASUREMENT OPTIMIZATION DYNAMICS PARAMETERS ELECTRON DENSITY MORPHOLOGY PATHS PHASE ALIGNMENT SHORT RANGE(TIME) SPECTRA PRECIPITATION DRIFT PARTICLES SEASONAL VARIATIONS SCALE LENGTH ANISOTROPY SLOPE GEOMETRY IONIZATION SOLAR ACTIVITY HIGH LATITUDES SOLAR CYCLE MAGNETOSPHERE SUNSPOTS SCINTILLATION ION DENSITY VELOCITY COUPLING(INTERACTION) TOTAL ELECTRON CONTENT HILAT SATELLITE AURORAL OVAL PE62101 WUAFGL46430903 |
description |
The orbiting HiLat satellite offered a unique opportunity for studying the ionospheric scintillation parameters in relation to the in-situ measurements of ionization density, drift velocity, field-aligned current, and particle precipitation during the sunspot minimum period. This paper discusses the results of such a morphological study based on observations at the auroral oval station of Tromso, Norway. The dynamics of the spatial and temporal extent of this region are illustrated in the invariant latitude/magnetic local time grid. The geometrical enhancement of scintillations observed during the alignment of the propagation path with the local magnetic L-shell is shown to be the most consistent and conspicuous feature of scintillations in the nighttime auroral oval. The steepening of phase spectral slope in this region is indicative of the presence of L-shell aligned sheet-like irregularities at long scale lengths. The seasonal variational of total electron content (TEC) determined from the differential Doppler measurements of HiLat transmissions is discussed in relation to the in-situ density measurements at 830 km. The results are also utilized to illustrate the dependence of ionospheric structure parameters on short-term variability of solar activity during the sunspot minimum period. Special effort is made to illustrate that the joint study of scintillation/TEC and in-situ parameters provides an insight into the nature of magnetospheric coupling with the high latitude ionosphere. Keywords: Amplitude and phase scintillations; Total electron content; In-situ density; Auroral oval; Sunspot cycle variation; Irregularity anisotropy; Reprints. Pub. in AGARD Conference Proceedings, n419 p50-1 thru p50-12 May 1987. |
author2 |
EMMANUEL COLL BOSTON MA |
format |
Text |
author |
Basu, Santimay Basu, Sunanda MacKenzie, Eileen Weimer, Dan |
author_facet |
Basu, Santimay Basu, Sunanda MacKenzie, Eileen Weimer, Dan |
author_sort |
Basu, Santimay |
title |
Ionospheric Scintillations and In-Situ Measurements at an Auroral Location in the European Sector |
title_short |
Ionospheric Scintillations and In-Situ Measurements at an Auroral Location in the European Sector |
title_full |
Ionospheric Scintillations and In-Situ Measurements at an Auroral Location in the European Sector |
title_fullStr |
Ionospheric Scintillations and In-Situ Measurements at an Auroral Location in the European Sector |
title_full_unstemmed |
Ionospheric Scintillations and In-Situ Measurements at an Auroral Location in the European Sector |
title_sort |
ionospheric scintillations and in-situ measurements at an auroral location in the european sector |
publishDate |
1988 |
url |
http://www.dtic.mil/docs/citations/ADA200761 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA200761 |
long_lat |
ENVELOPE(16.546,16.546,68.801,68.801) |
geographic |
Norway Tromso |
geographic_facet |
Norway Tromso |
genre |
Tromso Tromso |
genre_facet |
Tromso Tromso |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA200761 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766218537780641792 |