Calibration of all-sky cameras and tilting-photometers using an integrating-sphere and a spectrometer
We report calibration of the optical instruments of the Optical Mesosphere Thermosphere Imagers (OMTI) using facilities at the National Institute of Polar Research. OMTI has been developed to investigate dynamics of the upper atmosphere through nocturnal airglow emissions. OMTI consist of an imaging...
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ftdoajarticles:oai:doaj.org/article:c1548565e68f4384aba53c4fab99602b 2023-05-15T17:14:18+02:00 Calibration of all-sky cameras and tilting-photometers using an integrating-sphere and a spectrometer Yasuo Katoh Kazuo Shiokawa Mitsugi Satoh Mitsumu K. Ejiri Tadahiko Ogawa 1999-03-01T00:00:00Z https://doi.org/10.15094/00009066 https://doaj.org/article/c1548565e68f4384aba53c4fab99602b EN JA eng jpn National Institute of Polar Research http://doi.org/10.15094/00009066 https://doaj.org/toc/0085-7289 https://doaj.org/toc/2432-079X doi:10.15094/00009066 0085-7289 2432-079X https://doaj.org/article/c1548565e68f4384aba53c4fab99602b Antarctic Record, Vol 43, Iss 1, Pp 1-15 (1999) Geography (General) G1-922 article 1999 ftdoajarticles https://doi.org/10.15094/00009066 2022-12-31T14:59:32Z We report calibration of the optical instruments of the Optical Mesosphere Thermosphere Imagers (OMTI) using facilities at the National Institute of Polar Research. OMTI has been developed to investigate dynamics of the upper atmosphere through nocturnal airglow emissions. OMTI consist of an imaging Fabry-Perot interferometer, three all-sky cooled-CCD cameras, three tilting-photometers, and a spectral airglow temperature imager (SATI). The all-sky cameras and the photometers have been calibrated using a 2-m integrating-sphere and a spectrometer. Absolute sensitivity and image-flattening data are obtained together with filter transmission functions. Inhomogeneity of transmission function on the filter surface is found from the calibration using the spectrometer. We also find that filters with highly-flattened image-quality surfaces may cause serious Newton's Ring pattern on final images. Examples of the data are shown for the cameras and the photometers based on the airglow observation at Shigaraki (35°N, 136°E), Japan. Article in Journal/Newspaper National Institute of Polar Research Directory of Open Access Journals: DOAJ Articles Tilting ENVELOPE(-54.065,-54.065,49.700,49.700) |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English Japanese |
topic |
Geography (General) G1-922 |
spellingShingle |
Geography (General) G1-922 Yasuo Katoh Kazuo Shiokawa Mitsugi Satoh Mitsumu K. Ejiri Tadahiko Ogawa Calibration of all-sky cameras and tilting-photometers using an integrating-sphere and a spectrometer |
topic_facet |
Geography (General) G1-922 |
description |
We report calibration of the optical instruments of the Optical Mesosphere Thermosphere Imagers (OMTI) using facilities at the National Institute of Polar Research. OMTI has been developed to investigate dynamics of the upper atmosphere through nocturnal airglow emissions. OMTI consist of an imaging Fabry-Perot interferometer, three all-sky cooled-CCD cameras, three tilting-photometers, and a spectral airglow temperature imager (SATI). The all-sky cameras and the photometers have been calibrated using a 2-m integrating-sphere and a spectrometer. Absolute sensitivity and image-flattening data are obtained together with filter transmission functions. Inhomogeneity of transmission function on the filter surface is found from the calibration using the spectrometer. We also find that filters with highly-flattened image-quality surfaces may cause serious Newton's Ring pattern on final images. Examples of the data are shown for the cameras and the photometers based on the airglow observation at Shigaraki (35°N, 136°E), Japan. |
format |
Article in Journal/Newspaper |
author |
Yasuo Katoh Kazuo Shiokawa Mitsugi Satoh Mitsumu K. Ejiri Tadahiko Ogawa |
author_facet |
Yasuo Katoh Kazuo Shiokawa Mitsugi Satoh Mitsumu K. Ejiri Tadahiko Ogawa |
author_sort |
Yasuo Katoh |
title |
Calibration of all-sky cameras and tilting-photometers using an integrating-sphere and a spectrometer |
title_short |
Calibration of all-sky cameras and tilting-photometers using an integrating-sphere and a spectrometer |
title_full |
Calibration of all-sky cameras and tilting-photometers using an integrating-sphere and a spectrometer |
title_fullStr |
Calibration of all-sky cameras and tilting-photometers using an integrating-sphere and a spectrometer |
title_full_unstemmed |
Calibration of all-sky cameras and tilting-photometers using an integrating-sphere and a spectrometer |
title_sort |
calibration of all-sky cameras and tilting-photometers using an integrating-sphere and a spectrometer |
publisher |
National Institute of Polar Research |
publishDate |
1999 |
url |
https://doi.org/10.15094/00009066 https://doaj.org/article/c1548565e68f4384aba53c4fab99602b |
long_lat |
ENVELOPE(-54.065,-54.065,49.700,49.700) |
geographic |
Tilting |
geographic_facet |
Tilting |
genre |
National Institute of Polar Research |
genre_facet |
National Institute of Polar Research |
op_source |
Antarctic Record, Vol 43, Iss 1, Pp 1-15 (1999) |
op_relation |
http://doi.org/10.15094/00009066 https://doaj.org/toc/0085-7289 https://doaj.org/toc/2432-079X doi:10.15094/00009066 0085-7289 2432-079X https://doaj.org/article/c1548565e68f4384aba53c4fab99602b |
op_doi |
https://doi.org/10.15094/00009066 |
_version_ |
1766071662319501312 |