NORTHERN LATITUDE PROPAGATION
Satellite recordings made at Kiruna Geophysical Observatory at frequencies 20 and 54 Mc/s during the last three years are investigated with respect to the occurrence of scintillation with emphasis on the 54 Mc/s results. Studies of diurnal and seasonal variations of scintillation at 54 Mc/s show tha...
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ftdtic:AD0402303 2023-05-15T17:04:14+02:00 NORTHERN LATITUDE PROPAGATION Liszka, Ludwik KIRUNA GEOPHYSICAL OBSERVATORY (SWEDEN) 1963-03-23 text/html http://www.dtic.mil/docs/citations/AD0402303 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0402303 en eng http://www.dtic.mil/docs/citations/AD0402303 Approved for public release; distribution is unlimited. Document partially illegible. DTIC AND NTIS Atmospheric Physics Radiofrequency Wave Propagation Radio Communications *MAGNETOOPTICS *SATELLITE COMMUNICATIONS *RADIO SIGNALS *DISTORTION *DIURNAL VARIATIONS *IONOSPHERIC SCINTILLATION GEOMAGNETISM SWEDEN PERIODIC VARIATIONS ARTIFICIAL SATELLITES FOREIGN REPORTS Text 1963 ftdtic 2016-02-22T09:28:23Z Satellite recordings made at Kiruna Geophysical Observatory at frequencies 20 and 54 Mc/s during the last three years are investigated with respect to the occurrence of scintillation with emphasis on the 54 Mc/s results. Studies of diurnal and seasonal variations of scintillation at 54 Mc/s show that the shape of the diurnal curve is dependent on magnetic activity and that seasonal variations are not important. The depth of scintillation at 54 Mc/s is better correlated with magnetic activity than at 20 Mc/s. There exists a difference between daytime and night-time scintillation. A statistical analysis of the diffraction pattern produced by radio waves from Transit IV A at 54 Mc/s is also presented. The most important result is the evidence that auroral zone scintillation may be produced at altitudes below F-maximum. Investigation of the shape of ionospheric Irregularities have shown that if these are assumed to be two-axial ellipsoids orientated along the magnetic field lines, axis ratios of order of magnitude 10 will be obtained. Text Kiruna Defense Technical Information Center: DTIC Technical Reports database Kiruna |
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Open Polar |
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Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Atmospheric Physics Radiofrequency Wave Propagation Radio Communications *MAGNETOOPTICS *SATELLITE COMMUNICATIONS *RADIO SIGNALS *DISTORTION *DIURNAL VARIATIONS *IONOSPHERIC SCINTILLATION GEOMAGNETISM SWEDEN PERIODIC VARIATIONS ARTIFICIAL SATELLITES FOREIGN REPORTS |
spellingShingle |
Atmospheric Physics Radiofrequency Wave Propagation Radio Communications *MAGNETOOPTICS *SATELLITE COMMUNICATIONS *RADIO SIGNALS *DISTORTION *DIURNAL VARIATIONS *IONOSPHERIC SCINTILLATION GEOMAGNETISM SWEDEN PERIODIC VARIATIONS ARTIFICIAL SATELLITES FOREIGN REPORTS Liszka, Ludwik NORTHERN LATITUDE PROPAGATION |
topic_facet |
Atmospheric Physics Radiofrequency Wave Propagation Radio Communications *MAGNETOOPTICS *SATELLITE COMMUNICATIONS *RADIO SIGNALS *DISTORTION *DIURNAL VARIATIONS *IONOSPHERIC SCINTILLATION GEOMAGNETISM SWEDEN PERIODIC VARIATIONS ARTIFICIAL SATELLITES FOREIGN REPORTS |
description |
Satellite recordings made at Kiruna Geophysical Observatory at frequencies 20 and 54 Mc/s during the last three years are investigated with respect to the occurrence of scintillation with emphasis on the 54 Mc/s results. Studies of diurnal and seasonal variations of scintillation at 54 Mc/s show that the shape of the diurnal curve is dependent on magnetic activity and that seasonal variations are not important. The depth of scintillation at 54 Mc/s is better correlated with magnetic activity than at 20 Mc/s. There exists a difference between daytime and night-time scintillation. A statistical analysis of the diffraction pattern produced by radio waves from Transit IV A at 54 Mc/s is also presented. The most important result is the evidence that auroral zone scintillation may be produced at altitudes below F-maximum. Investigation of the shape of ionospheric Irregularities have shown that if these are assumed to be two-axial ellipsoids orientated along the magnetic field lines, axis ratios of order of magnitude 10 will be obtained. |
author2 |
KIRUNA GEOPHYSICAL OBSERVATORY (SWEDEN) |
format |
Text |
author |
Liszka, Ludwik |
author_facet |
Liszka, Ludwik |
author_sort |
Liszka, Ludwik |
title |
NORTHERN LATITUDE PROPAGATION |
title_short |
NORTHERN LATITUDE PROPAGATION |
title_full |
NORTHERN LATITUDE PROPAGATION |
title_fullStr |
NORTHERN LATITUDE PROPAGATION |
title_full_unstemmed |
NORTHERN LATITUDE PROPAGATION |
title_sort |
northern latitude propagation |
publishDate |
1963 |
url |
http://www.dtic.mil/docs/citations/AD0402303 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0402303 |
geographic |
Kiruna |
geographic_facet |
Kiruna |
genre |
Kiruna |
genre_facet |
Kiruna |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/AD0402303 |
op_rights |
Approved for public release; distribution is unlimited. Document partially illegible. |
_version_ |
1766058304417562624 |