On the Possibility of Bistatic HF Ionospheric Sounding by Exact Time Signals
Characteristics of high-frequency signals that propagatedbetween the RWM radio station (Moscow region, Russia)and Radio Astronomical Observatory (Kharkiv region, Ukraine) at frequencies above the maximum usable frequency on direct path were investigated. The Doppler frequency shifts and group delay...
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| Дата: | 2013 |
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| Автори: | , , , |
| Формат: | Стаття |
| Мова: | Russian |
| Опубліковано: |
Видавничий дім «Академперіодика»
2013
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| Онлайн доступ: | http://rpra-journal.org.ua/index.php/ra/article/view/1118 |
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| Назва журналу: | Radio physics and radio astronomy |
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rpra-journalorgua-article-11182013-04-05T00:22:19Z On the Possibility of Bistatic HF Ionospheric Sounding by Exact Time Signals О возможности бистатического ВЧ зондирования ионосферы сигналами точного времени Kascheev, S. B. Zalizovski, A. V. Sopin, A. O. Pikulik, I. I. Characteristics of high-frequency signals that propagatedbetween the RWM radio station (Moscow region, Russia)and Radio Astronomical Observatory (Kharkiv region, Ukraine) at frequencies above the maximum usable frequency on direct path were investigated. The Doppler frequency shifts and group delay of individual components were investigated for the multimode signal received with the nondirectional antenna. The azimuthal dependence of received signal power was measured by a highly directive antenna. It is shown that the electromagnetic energy propagated between the transmitting and receiving pointsthrough several different paths, which differed in length, position and time of existence. An explanation of the group delay of individual modes and their existence time is proposed.It is shown that the main component of the received signal power is determined by the oblique back scatter sounding from the south-east and by scattering on the edge of the aurora oval during geomagnetic disturbances. Проведены исследования характеристик импульсных ВЧ сигналов, которые распространялись между радиостанцией РВМ (Московская обл., Россия) и приемным пунктом в Радиоастрономической обсерватории РИ НАНУ (Харьковская обл., Украина) на частотах выше максимально применимой частоты для прямой трассы. В принятом на ненаправленную антенну многомодовом сигнале исследованы доплеровские сдвиги и время группового запаздывания отдельных составляющих. С помощью остронаправленной антенны измерены азимутальные зависимости мощности принятого сигнала. Показано, что распространение электромагнитной энергии между приемным и передающим пунктами происходит по нескольким различным трассам, которые отличаются протяженностью, положением в пространстве и временем существования. Предложено объяснение времени групповой задержки отдельных мод и периода их существования. Показано, что основная составляющая мощности принятого сигнала в спокойных геомагнитных условиях определялась сигналами двухпозиционного возвратно-наклонного зондирования, приходящими с юго-восточного направления, а во время магнитного возмущения – рассеянием на границе полярного овала. Видавничий дім «Академперіодика» 2013-04-03 Article Article application/pdf http://rpra-journal.org.ua/index.php/ra/article/view/1118 РАДИОФИЗИКА И РАДИОАСТРОНОМИЯ; Vol 18, No 1 (2013); 34 RADIO PHYSICS AND RADIO ASTRONOMY; Vol 18, No 1 (2013); 34 РАДІОФІЗИКА І РАДІОАСТРОНОМІЯ; Vol 18, No 1 (2013); 34 2415-7007 1027-9636 ru http://rpra-journal.org.ua/index.php/ra/article/view/1118/756 |
| institution |
Radio physics and radio astronomy |
| baseUrl_str |
|
| datestamp_date |
2013-04-05T00:22:19Z |
| collection |
OJS |
| language |
Russian |
| format |
Article |
| author |
Kascheev, S. B. Zalizovski, A. V. Sopin, A. O. Pikulik, I. I. |
| spellingShingle |
Kascheev, S. B. Zalizovski, A. V. Sopin, A. O. Pikulik, I. I. On the Possibility of Bistatic HF Ionospheric Sounding by Exact Time Signals |
| author_facet |
Kascheev, S. B. Zalizovski, A. V. Sopin, A. O. Pikulik, I. I. |
| author_sort |
Kascheev, S. B. |
| title |
On the Possibility of Bistatic HF Ionospheric Sounding by Exact Time Signals |
| title_short |
On the Possibility of Bistatic HF Ionospheric Sounding by Exact Time Signals |
| title_full |
On the Possibility of Bistatic HF Ionospheric Sounding by Exact Time Signals |
| title_fullStr |
On the Possibility of Bistatic HF Ionospheric Sounding by Exact Time Signals |
| title_full_unstemmed |
On the Possibility of Bistatic HF Ionospheric Sounding by Exact Time Signals |
| title_sort |
on the possibility of bistatic hf ionospheric sounding by exact time signals |
| title_alt |
О возможности бистатического ВЧ зондирования ионосферы сигналами точного времени |
| description |
Characteristics of high-frequency signals that propagatedbetween the RWM radio station (Moscow region, Russia)and Radio Astronomical Observatory (Kharkiv region, Ukraine) at frequencies above the maximum usable frequency on direct path were investigated. The Doppler frequency shifts and group delay of individual components were investigated for the multimode signal received with the nondirectional antenna. The azimuthal dependence of received signal power was measured by a highly directive antenna. It is shown that the electromagnetic energy propagated between the transmitting and receiving pointsthrough several different paths, which differed in length, position and time of existence. An explanation of the group delay of individual modes and their existence time is proposed.It is shown that the main component of the received signal power is determined by the oblique back scatter sounding from the south-east and by scattering on the edge of the aurora oval during geomagnetic disturbances. |
| publisher |
Видавничий дім «Академперіодика» |
| publishDate |
2013 |
| url |
http://rpra-journal.org.ua/index.php/ra/article/view/1118 |
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