New techniques for auroral irregularity studies with COSCAT
The COSCAT system enables the detection of E-region auroral backscatter with the EISCAT remote receivers at magnetic aspect angles close to 90 ° . This is achieved by utilising a low-power transmitter stationed in Oulu, Finland. Many important observations of E-region irregularities have been achiev...
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ftcopernicus:oai:publications.copernicus.org:angeo34221 2023-05-15T16:04:42+02:00 New techniques for auroral irregularity studies with COSCAT Eglitis, P. McCrea, I. W. Robinson, T. R. Nygrén, T. Schlegel, K. Turunen, T. Jones, T. B. 2018-09-27 application/pdf https://doi.org/10.1007/s00585-998-1241-0 https://angeo.copernicus.org/articles/16/1241/1998/ eng eng doi:10.1007/s00585-998-1241-0 https://angeo.copernicus.org/articles/16/1241/1998/ eISSN: 1432-0576 Text 2018 ftcopernicus https://doi.org/10.1007/s00585-998-1241-0 2020-07-20T16:28:05Z The COSCAT system enables the detection of E-region auroral backscatter with the EISCAT remote receivers at magnetic aspect angles close to 90 ° . This is achieved by utilising a low-power transmitter stationed in Oulu, Finland. Many important observations of E-region irregularities have been achieved with this simple experiment. Recent studies have attempted to push the COSCAT system to its experimental limits. Firstly, the CW signal has been phase-modulated with 13-bit Barker codes with baud lengths of 40, 70 and 100 µs. Interpretation of the received power allows the spatial distribution of the auroral scatterers to be determined. The second advance is in the use of a sophisticated correlator program which allows data to be buffered within the correlator at very high time resolution. This enables the coherent backscatter power to be sampled every 12.5 ms and the full auto-correlation function to be measured every 100 ms. These measurements allow the COSCAT system to be employed for the first time in an investigation of the growth and decay of the auroral irregularities. Key words. Ionosphere (ionospheric irregularities) · Radio science (Instruments and techniques) Text EISCAT Copernicus Publications: E-Journals Annales Geophysicae 16 10 1241 1250 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
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English |
description |
The COSCAT system enables the detection of E-region auroral backscatter with the EISCAT remote receivers at magnetic aspect angles close to 90 ° . This is achieved by utilising a low-power transmitter stationed in Oulu, Finland. Many important observations of E-region irregularities have been achieved with this simple experiment. Recent studies have attempted to push the COSCAT system to its experimental limits. Firstly, the CW signal has been phase-modulated with 13-bit Barker codes with baud lengths of 40, 70 and 100 µs. Interpretation of the received power allows the spatial distribution of the auroral scatterers to be determined. The second advance is in the use of a sophisticated correlator program which allows data to be buffered within the correlator at very high time resolution. This enables the coherent backscatter power to be sampled every 12.5 ms and the full auto-correlation function to be measured every 100 ms. These measurements allow the COSCAT system to be employed for the first time in an investigation of the growth and decay of the auroral irregularities. Key words. Ionosphere (ionospheric irregularities) · Radio science (Instruments and techniques) |
format |
Text |
author |
Eglitis, P. McCrea, I. W. Robinson, T. R. Nygrén, T. Schlegel, K. Turunen, T. Jones, T. B. |
spellingShingle |
Eglitis, P. McCrea, I. W. Robinson, T. R. Nygrén, T. Schlegel, K. Turunen, T. Jones, T. B. New techniques for auroral irregularity studies with COSCAT |
author_facet |
Eglitis, P. McCrea, I. W. Robinson, T. R. Nygrén, T. Schlegel, K. Turunen, T. Jones, T. B. |
author_sort |
Eglitis, P. |
title |
New techniques for auroral irregularity studies with COSCAT |
title_short |
New techniques for auroral irregularity studies with COSCAT |
title_full |
New techniques for auroral irregularity studies with COSCAT |
title_fullStr |
New techniques for auroral irregularity studies with COSCAT |
title_full_unstemmed |
New techniques for auroral irregularity studies with COSCAT |
title_sort |
new techniques for auroral irregularity studies with coscat |
publishDate |
2018 |
url |
https://doi.org/10.1007/s00585-998-1241-0 https://angeo.copernicus.org/articles/16/1241/1998/ |
genre |
EISCAT |
genre_facet |
EISCAT |
op_source |
eISSN: 1432-0576 |
op_relation |
doi:10.1007/s00585-998-1241-0 https://angeo.copernicus.org/articles/16/1241/1998/ |
op_doi |
https://doi.org/10.1007/s00585-998-1241-0 |
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Annales Geophysicae |
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16 |
container_issue |
10 |
container_start_page |
1241 |
op_container_end_page |
1250 |
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1766400323224600576 |