Measurement of thermospheric temperatures using OMTI Fabry–Perot interferometers with 70-mm etalon
Abstract Fabry–Perot interferometer (FPI) is an instrument that can measure the temperature and wind velocity of the thermosphere through observations of airglow emission at a wavelength of 630.0 nm. The Solar-Terrestrial Environment Laboratory/Institute for Space-Earth Environmental Research, Nagoy...
Published in: | Earth, Planets and Space |
---|---|
Main Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
SpringerOpen
2017
|
Subjects: | |
Online Access: | https://doi.org/10.1186/s40623-017-0643-1 https://doaj.org/article/11c9140dd6114ae296928f9f11cabd2a |
id |
ftdoajarticles:oai:doaj.org/article:11c9140dd6114ae296928f9f11cabd2a |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:11c9140dd6114ae296928f9f11cabd2a 2023-05-15T18:34:58+02:00 Measurement of thermospheric temperatures using OMTI Fabry–Perot interferometers with 70-mm etalon Y. Nakamura K. Shiokawa Y. Otsuka S. Oyama S. Nozawa T. Komolmis S. Komonjida Dave Neudegg Colin Yuile J. Meriwether H. Shinagawa H. Jin 2017-04-01T00:00:00Z https://doi.org/10.1186/s40623-017-0643-1 https://doaj.org/article/11c9140dd6114ae296928f9f11cabd2a EN eng SpringerOpen http://link.springer.com/article/10.1186/s40623-017-0643-1 https://doaj.org/toc/1880-5981 doi:10.1186/s40623-017-0643-1 1880-5981 https://doaj.org/article/11c9140dd6114ae296928f9f11cabd2a Earth, Planets and Space, Vol 69, Iss 1, Pp 1-13 (2017) Fabry–Perot interferometer 630.0 nm Thermosphere Temperature Small etalon Geography. Anthropology. Recreation G Geodesy QB275-343 Geology QE1-996.5 article 2017 ftdoajarticles https://doi.org/10.1186/s40623-017-0643-1 2022-12-31T03:40:44Z Abstract Fabry–Perot interferometer (FPI) is an instrument that can measure the temperature and wind velocity of the thermosphere through observations of airglow emission at a wavelength of 630.0 nm. The Solar-Terrestrial Environment Laboratory/Institute for Space-Earth Environmental Research, Nagoya University, has recently developed four new ground-based FPIs. One of those FPIs, possessing a large-aperture etalon (diameter: 116 mm), was installed in Tromsø (FP01), Norway, in 2009. The other three small FPIs, using 70-mm-diameter etalons, were installed in Thailand (FP02), Indonesia (FP03) and Australia (FP04) in 2010–2011. They use highly sensitive cooled-CCD cameras with 1024 × 1024 pixels to obtain interference fringes. However, appropriate temperature has not been obtained from the interference fringes using these new small-aperture FPIs. In the present study we improved the analysis procedure of temperature determination using these FPIs. Each of FPIs measures north, south, east and west directions repeatedly by rotating two mirrors mounted on top of the FPI. We estimated center pixel of laser fringe and airglow fringes for each direction and found significant differences in the center pixel locations (a few pixels) among the measurement directions. These differences are considered to be caused by movement of the scanning mirror on the top of the optics, resulting in mechanical distortion of the optics body. By calculating the fringe center separately for each direction, we could correct these center pixel variations and determine the temperature with random errors of 10–40 K. This new method was employed to the all measurements from four FPIs after 2009 and provided temperatures with reasonably small errors. However, we found that temperatures below 400 K were obtained associated with weak airglow intensities and concluded using a model calculation that they are due to contamination of OH line emissions in the upper mesosphere. By defining an appropriate threshold of the fringe peak count, we successfully ... Article in Journal/Newspaper Tromsø Directory of Open Access Journals: DOAJ Articles New Ground ENVELOPE(-55.215,-55.215,49.567,49.567) Norway Tromsø Earth, Planets and Space 69 1 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Fabry–Perot interferometer 630.0 nm Thermosphere Temperature Small etalon Geography. Anthropology. Recreation G Geodesy QB275-343 Geology QE1-996.5 |
spellingShingle |
Fabry–Perot interferometer 630.0 nm Thermosphere Temperature Small etalon Geography. Anthropology. Recreation G Geodesy QB275-343 Geology QE1-996.5 Y. Nakamura K. Shiokawa Y. Otsuka S. Oyama S. Nozawa T. Komolmis S. Komonjida Dave Neudegg Colin Yuile J. Meriwether H. Shinagawa H. Jin Measurement of thermospheric temperatures using OMTI Fabry–Perot interferometers with 70-mm etalon |
topic_facet |
Fabry–Perot interferometer 630.0 nm Thermosphere Temperature Small etalon Geography. Anthropology. Recreation G Geodesy QB275-343 Geology QE1-996.5 |
description |
Abstract Fabry–Perot interferometer (FPI) is an instrument that can measure the temperature and wind velocity of the thermosphere through observations of airglow emission at a wavelength of 630.0 nm. The Solar-Terrestrial Environment Laboratory/Institute for Space-Earth Environmental Research, Nagoya University, has recently developed four new ground-based FPIs. One of those FPIs, possessing a large-aperture etalon (diameter: 116 mm), was installed in Tromsø (FP01), Norway, in 2009. The other three small FPIs, using 70-mm-diameter etalons, were installed in Thailand (FP02), Indonesia (FP03) and Australia (FP04) in 2010–2011. They use highly sensitive cooled-CCD cameras with 1024 × 1024 pixels to obtain interference fringes. However, appropriate temperature has not been obtained from the interference fringes using these new small-aperture FPIs. In the present study we improved the analysis procedure of temperature determination using these FPIs. Each of FPIs measures north, south, east and west directions repeatedly by rotating two mirrors mounted on top of the FPI. We estimated center pixel of laser fringe and airglow fringes for each direction and found significant differences in the center pixel locations (a few pixels) among the measurement directions. These differences are considered to be caused by movement of the scanning mirror on the top of the optics, resulting in mechanical distortion of the optics body. By calculating the fringe center separately for each direction, we could correct these center pixel variations and determine the temperature with random errors of 10–40 K. This new method was employed to the all measurements from four FPIs after 2009 and provided temperatures with reasonably small errors. However, we found that temperatures below 400 K were obtained associated with weak airglow intensities and concluded using a model calculation that they are due to contamination of OH line emissions in the upper mesosphere. By defining an appropriate threshold of the fringe peak count, we successfully ... |
format |
Article in Journal/Newspaper |
author |
Y. Nakamura K. Shiokawa Y. Otsuka S. Oyama S. Nozawa T. Komolmis S. Komonjida Dave Neudegg Colin Yuile J. Meriwether H. Shinagawa H. Jin |
author_facet |
Y. Nakamura K. Shiokawa Y. Otsuka S. Oyama S. Nozawa T. Komolmis S. Komonjida Dave Neudegg Colin Yuile J. Meriwether H. Shinagawa H. Jin |
author_sort |
Y. Nakamura |
title |
Measurement of thermospheric temperatures using OMTI Fabry–Perot interferometers with 70-mm etalon |
title_short |
Measurement of thermospheric temperatures using OMTI Fabry–Perot interferometers with 70-mm etalon |
title_full |
Measurement of thermospheric temperatures using OMTI Fabry–Perot interferometers with 70-mm etalon |
title_fullStr |
Measurement of thermospheric temperatures using OMTI Fabry–Perot interferometers with 70-mm etalon |
title_full_unstemmed |
Measurement of thermospheric temperatures using OMTI Fabry–Perot interferometers with 70-mm etalon |
title_sort |
measurement of thermospheric temperatures using omti fabry–perot interferometers with 70-mm etalon |
publisher |
SpringerOpen |
publishDate |
2017 |
url |
https://doi.org/10.1186/s40623-017-0643-1 https://doaj.org/article/11c9140dd6114ae296928f9f11cabd2a |
long_lat |
ENVELOPE(-55.215,-55.215,49.567,49.567) |
geographic |
New Ground Norway Tromsø |
geographic_facet |
New Ground Norway Tromsø |
genre |
Tromsø |
genre_facet |
Tromsø |
op_source |
Earth, Planets and Space, Vol 69, Iss 1, Pp 1-13 (2017) |
op_relation |
http://link.springer.com/article/10.1186/s40623-017-0643-1 https://doaj.org/toc/1880-5981 doi:10.1186/s40623-017-0643-1 1880-5981 https://doaj.org/article/11c9140dd6114ae296928f9f11cabd2a |
op_doi |
https://doi.org/10.1186/s40623-017-0643-1 |
container_title |
Earth, Planets and Space |
container_volume |
69 |
container_issue |
1 |
_version_ |
1766220011328765952 |