SCANDI - an all-sky Doppler imager for studies of thermospheric spatial structure
A new all-sky Fabry-Perot Interferometer called the Scanning Doppler Imager (SCANDI) was built and installed at Longyearbyen in December 2006. Observations have been made of the Doppler shifts and Doppler broadening of the 630 nm airglow and aurora, from which upper thermospheric winds and temperatu...
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2010
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ftucl:oai:eprints.ucl.ac.uk.OAI2:144975 2023-05-15T16:04:47+02:00 SCANDI - an all-sky Doppler imager for studies of thermospheric spatial structure Aruliah, AL Griffin, EM Yiu, HCI McWhirter, I Charalambous, A 2010 http://discovery.ucl.ac.uk/144975/ unknown COPERNICUS GESELLSCHAFT MBH open ANN GEOPHYS-GERMANY , 28 (2) 549 - 567. (2010) Atmospheric composition and structure Air-glow and aurora Meteorology and atmospheric dynamics Thermospheric dynamics Instruments and techniques IMAGING PHOTON DETECTORS DYNAMICS RADAR WINDS PERFORMANCE SYSTEM FIELD Article 2010 ftucl 2016-01-15T03:29:53Z A new all-sky Fabry-Perot Interferometer called the Scanning Doppler Imager (SCANDI) was built and installed at Longyearbyen in December 2006. Observations have been made of the Doppler shifts and Doppler broadening of the 630 nm airglow and aurora, from which upper thermospheric winds and temperatures are calculated. SCANDI allows measurements over a field-of-view (FOV) with a horizontal radius of nearly 600 km for observations at an altitude of 250 km using a time resolution of 8 min. The instrument provides the ability to observe thermospheric spatial structure within a FOV which overlaps that of the EISCAT Svalbard radar and CUTLASS SuperDARN radars. Coordinating with these instruments provides an important opportunity for studying ion-neutral coupling. The all-sky image is divided into several sectors to provide a horizontal spatial resolution of between 100-300 km. This is a powerful extension in observational capability but requires careful calibration and data analysis, as described here. Two observation modes were used: a fixed and a scanning etalon gap. SCANDI results are corroborated using the Longyearbyen single look direction FPI, and ESR measurements of the ion temperatures. The data show thermospheric temperature gradients of a few Kelvins per kilometre, and a great deal of meso-scale variability on spatial scales of several tens of kilometres. Article in Journal/Newspaper EISCAT Longyearbyen Svalbard University College London: UCL Discovery Longyearbyen Svalbard |
institution |
Open Polar |
collection |
University College London: UCL Discovery |
op_collection_id |
ftucl |
language |
unknown |
topic |
Atmospheric composition and structure Air-glow and aurora Meteorology and atmospheric dynamics Thermospheric dynamics Instruments and techniques IMAGING PHOTON DETECTORS DYNAMICS RADAR WINDS PERFORMANCE SYSTEM FIELD |
spellingShingle |
Atmospheric composition and structure Air-glow and aurora Meteorology and atmospheric dynamics Thermospheric dynamics Instruments and techniques IMAGING PHOTON DETECTORS DYNAMICS RADAR WINDS PERFORMANCE SYSTEM FIELD Aruliah, AL Griffin, EM Yiu, HCI McWhirter, I Charalambous, A SCANDI - an all-sky Doppler imager for studies of thermospheric spatial structure |
topic_facet |
Atmospheric composition and structure Air-glow and aurora Meteorology and atmospheric dynamics Thermospheric dynamics Instruments and techniques IMAGING PHOTON DETECTORS DYNAMICS RADAR WINDS PERFORMANCE SYSTEM FIELD |
description |
A new all-sky Fabry-Perot Interferometer called the Scanning Doppler Imager (SCANDI) was built and installed at Longyearbyen in December 2006. Observations have been made of the Doppler shifts and Doppler broadening of the 630 nm airglow and aurora, from which upper thermospheric winds and temperatures are calculated. SCANDI allows measurements over a field-of-view (FOV) with a horizontal radius of nearly 600 km for observations at an altitude of 250 km using a time resolution of 8 min. The instrument provides the ability to observe thermospheric spatial structure within a FOV which overlaps that of the EISCAT Svalbard radar and CUTLASS SuperDARN radars. Coordinating with these instruments provides an important opportunity for studying ion-neutral coupling. The all-sky image is divided into several sectors to provide a horizontal spatial resolution of between 100-300 km. This is a powerful extension in observational capability but requires careful calibration and data analysis, as described here. Two observation modes were used: a fixed and a scanning etalon gap. SCANDI results are corroborated using the Longyearbyen single look direction FPI, and ESR measurements of the ion temperatures. The data show thermospheric temperature gradients of a few Kelvins per kilometre, and a great deal of meso-scale variability on spatial scales of several tens of kilometres. |
format |
Article in Journal/Newspaper |
author |
Aruliah, AL Griffin, EM Yiu, HCI McWhirter, I Charalambous, A |
author_facet |
Aruliah, AL Griffin, EM Yiu, HCI McWhirter, I Charalambous, A |
author_sort |
Aruliah, AL |
title |
SCANDI - an all-sky Doppler imager for studies of thermospheric spatial structure |
title_short |
SCANDI - an all-sky Doppler imager for studies of thermospheric spatial structure |
title_full |
SCANDI - an all-sky Doppler imager for studies of thermospheric spatial structure |
title_fullStr |
SCANDI - an all-sky Doppler imager for studies of thermospheric spatial structure |
title_full_unstemmed |
SCANDI - an all-sky Doppler imager for studies of thermospheric spatial structure |
title_sort |
scandi - an all-sky doppler imager for studies of thermospheric spatial structure |
publisher |
COPERNICUS GESELLSCHAFT MBH |
publishDate |
2010 |
url |
http://discovery.ucl.ac.uk/144975/ |
geographic |
Longyearbyen Svalbard |
geographic_facet |
Longyearbyen Svalbard |
genre |
EISCAT Longyearbyen Svalbard |
genre_facet |
EISCAT Longyearbyen Svalbard |
op_source |
ANN GEOPHYS-GERMANY , 28 (2) 549 - 567. (2010) |
op_rights |
open |
_version_ |
1766400408538841088 |