Multi beam observations of cosmic radio noise using a VHF radar with beam forming by a Butler matrix
The Leibniz-Institute of Atmospheric Physics (IAP) in Kühlungsborn started to install a new MST radar on the North-Norwegian island Andøya (69.30° N, 16.04° E) in 2009. The new Middle Atmosphere Alomar Radar System (MAARSY) replaces the previous ALWIN radar which has been successfully operated for m...
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ftdoajarticles:oai:doaj.org/article:1b65cd3d6e774179ae983b3229a31cc2 2023-05-15T13:25:41+02:00 Multi beam observations of cosmic radio noise using a VHF radar with beam forming by a Butler matrix T. Renkwitz W. Singer R. Latteck M. Rapp 2011-08-01T00:00:00Z https://doi.org/10.5194/ars-9-349-2011 https://doaj.org/article/1b65cd3d6e774179ae983b3229a31cc2 DE EN ger eng Copernicus Publications http://www.adv-radio-sci.net/9/349/2011/ars-9-349-2011.pdf https://doaj.org/toc/1684-9965 https://doaj.org/toc/1684-9973 1684-9965 1684-9973 doi:10.5194/ars-9-349-2011 https://doaj.org/article/1b65cd3d6e774179ae983b3229a31cc2 Advances in Radio Science, Vol 9, Pp 349-357 (2011) Engineering (General). Civil engineering (General) TA1-2040 article 2011 ftdoajarticles https://doi.org/10.5194/ars-9-349-2011 2023-01-08T01:24:43Z The Leibniz-Institute of Atmospheric Physics (IAP) in Kühlungsborn started to install a new MST radar on the North-Norwegian island Andøya (69.30° N, 16.04° E) in 2009. The new Middle Atmosphere Alomar Radar System (MAARSY) replaces the previous ALWIN radar which has been successfully operated for more than 10 years. The MAARSY radar provides increased temporal and spatial resolution combined with a flexible sequential point-to-point steering of the radar beam. To increase the spatiotemporal resolution of the observations a 16-port Butler matrix has been built and implemented to the radar. In conjunction with 64 Yagi antennas of the former ALWIN antenna array the Butler matrix simultaneously provides 16 individual beams. The beam forming capability of the Butler matrix arrangement has been verified observing the galactic cosmic radio noise of the supernova remnant Cassiopeia A. Furthermore, this multi beam configuration has been used in passive experiments to estimate the cosmic noise absorption at 53.5 MHz during events of enhanced solar and geomagnetic activity as indicators for enhanced ionization at altitudes below 90 km. These observations are well correlated with simultaneous observations of corresponding beams of the co-located imaging riometer AIRIS (69.14° N, 16.02° E) at 38.2 MHz. In addition, enhanced cosmic noise absorption goes along with enhanced electron densities at altitudes below about 90 km as observed with the co-located Saura MF radar using differential absorption and differential phase measurements. Article in Journal/Newspaper Andøya Directory of Open Access Journals: DOAJ Articles Alomar ENVELOPE(-67.083,-67.083,-68.133,-68.133) Andøya ENVELOPE(13.982,13.982,68.185,68.185) Saura ENVELOPE(12.989,12.989,66.233,66.233) Advances in Radio Science 9 349 357 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
German English |
topic |
Engineering (General). Civil engineering (General) TA1-2040 |
spellingShingle |
Engineering (General). Civil engineering (General) TA1-2040 T. Renkwitz W. Singer R. Latteck M. Rapp Multi beam observations of cosmic radio noise using a VHF radar with beam forming by a Butler matrix |
topic_facet |
Engineering (General). Civil engineering (General) TA1-2040 |
description |
The Leibniz-Institute of Atmospheric Physics (IAP) in Kühlungsborn started to install a new MST radar on the North-Norwegian island Andøya (69.30° N, 16.04° E) in 2009. The new Middle Atmosphere Alomar Radar System (MAARSY) replaces the previous ALWIN radar which has been successfully operated for more than 10 years. The MAARSY radar provides increased temporal and spatial resolution combined with a flexible sequential point-to-point steering of the radar beam. To increase the spatiotemporal resolution of the observations a 16-port Butler matrix has been built and implemented to the radar. In conjunction with 64 Yagi antennas of the former ALWIN antenna array the Butler matrix simultaneously provides 16 individual beams. The beam forming capability of the Butler matrix arrangement has been verified observing the galactic cosmic radio noise of the supernova remnant Cassiopeia A. Furthermore, this multi beam configuration has been used in passive experiments to estimate the cosmic noise absorption at 53.5 MHz during events of enhanced solar and geomagnetic activity as indicators for enhanced ionization at altitudes below 90 km. These observations are well correlated with simultaneous observations of corresponding beams of the co-located imaging riometer AIRIS (69.14° N, 16.02° E) at 38.2 MHz. In addition, enhanced cosmic noise absorption goes along with enhanced electron densities at altitudes below about 90 km as observed with the co-located Saura MF radar using differential absorption and differential phase measurements. |
format |
Article in Journal/Newspaper |
author |
T. Renkwitz W. Singer R. Latteck M. Rapp |
author_facet |
T. Renkwitz W. Singer R. Latteck M. Rapp |
author_sort |
T. Renkwitz |
title |
Multi beam observations of cosmic radio noise using a VHF radar with beam forming by a Butler matrix |
title_short |
Multi beam observations of cosmic radio noise using a VHF radar with beam forming by a Butler matrix |
title_full |
Multi beam observations of cosmic radio noise using a VHF radar with beam forming by a Butler matrix |
title_fullStr |
Multi beam observations of cosmic radio noise using a VHF radar with beam forming by a Butler matrix |
title_full_unstemmed |
Multi beam observations of cosmic radio noise using a VHF radar with beam forming by a Butler matrix |
title_sort |
multi beam observations of cosmic radio noise using a vhf radar with beam forming by a butler matrix |
publisher |
Copernicus Publications |
publishDate |
2011 |
url |
https://doi.org/10.5194/ars-9-349-2011 https://doaj.org/article/1b65cd3d6e774179ae983b3229a31cc2 |
long_lat |
ENVELOPE(-67.083,-67.083,-68.133,-68.133) ENVELOPE(13.982,13.982,68.185,68.185) ENVELOPE(12.989,12.989,66.233,66.233) |
geographic |
Alomar Andøya Saura |
geographic_facet |
Alomar Andøya Saura |
genre |
Andøya |
genre_facet |
Andøya |
op_source |
Advances in Radio Science, Vol 9, Pp 349-357 (2011) |
op_relation |
http://www.adv-radio-sci.net/9/349/2011/ars-9-349-2011.pdf https://doaj.org/toc/1684-9965 https://doaj.org/toc/1684-9973 1684-9965 1684-9973 doi:10.5194/ars-9-349-2011 https://doaj.org/article/1b65cd3d6e774179ae983b3229a31cc2 |
op_doi |
https://doi.org/10.5194/ars-9-349-2011 |
container_title |
Advances in Radio Science |
container_volume |
9 |
container_start_page |
349 |
op_container_end_page |
357 |
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1766387219967246336 |