In-orbit straylight characterization and correction of optical radiometer using the moon image

The moon images have been in recent years employed as a referential light source for in-orbit radiometric characterization of on-board radiometer in spacecraft. The irradiance obtained by the integration of the radiance of moon pixels is compared to the referential irradiance that derives from the a...

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Autores principales:	Shigemasa ANDO, Kazuhiro TANAKA
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2019
Materias:	space engineering remote sensing radiometer straylight correction moon maneuver line spread function Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/770db27576ba45bab5fdbfc06b10066b
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spelling	oai:doaj.org-article:770db27576ba45bab5fdbfc06b10066b2021-11-29T05:48:34ZIn-orbit straylight characterization and correction of optical radiometer using the moon image2187-974510.1299/mej.19-00098https://doaj.org/article/770db27576ba45bab5fdbfc06b10066b2019-11-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/6/6/6_19-00098/_pdf/-char/enhttps://doaj.org/toc/2187-9745The moon images have been in recent years employed as a referential light source for in-orbit radiometric characterization of on-board radiometer in spacecraft. The irradiance obtained by the integration of the radiance of moon pixels is compared to the referential irradiance that derives from the astrophysical model, and the comparison result includes the gain characteristics of radiometer. In addition to this radiometric purpose, the limb between moon disk and deep space is also an ideal edge in optical aspect. The edge response of radiometer obtained in the limb includes the characteristics of MTF (modulation transfer function) and straylight. In this paper, in-orbit straylight characterization and correction of SGLI (Second Generation Global Imager) radiometer that is flying on JAXA's remote sensing satellite "SHIKISAI" is reported. It is shown that LSF (line spread function) measured in the moon limb is effective trend monitor of radiometer's geometric property in orbit and is also a key to verify the validity of straylight correction model implemented in the ground data processing system. This paper proposes the methodology that constructs PSF (point spread function) by LSFs in two orthogonal direction and corrects straylight of not only the Moon but the earth image by using the constructed PSF.Shigemasa ANDOKazuhiro TANAKAThe Japan Society of Mechanical Engineersarticlespace engineeringremote sensingradiometerstraylight correctionmoon maneuverline spread functionMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 6, Iss 6, Pp 19-00098-19-00098 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	space engineering remote sensing radiometer straylight correction moon maneuver line spread function Mechanical engineering and machinery TJ1-1570
spellingShingle	space engineering remote sensing radiometer straylight correction moon maneuver line spread function Mechanical engineering and machinery TJ1-1570 Shigemasa ANDO Kazuhiro TANAKA In-orbit straylight characterization and correction of optical radiometer using the moon image
description	The moon images have been in recent years employed as a referential light source for in-orbit radiometric characterization of on-board radiometer in spacecraft. The irradiance obtained by the integration of the radiance of moon pixels is compared to the referential irradiance that derives from the astrophysical model, and the comparison result includes the gain characteristics of radiometer. In addition to this radiometric purpose, the limb between moon disk and deep space is also an ideal edge in optical aspect. The edge response of radiometer obtained in the limb includes the characteristics of MTF (modulation transfer function) and straylight. In this paper, in-orbit straylight characterization and correction of SGLI (Second Generation Global Imager) radiometer that is flying on JAXA's remote sensing satellite "SHIKISAI" is reported. It is shown that LSF (line spread function) measured in the moon limb is effective trend monitor of radiometer's geometric property in orbit and is also a key to verify the validity of straylight correction model implemented in the ground data processing system. This paper proposes the methodology that constructs PSF (point spread function) by LSFs in two orthogonal direction and corrects straylight of not only the Moon but the earth image by using the constructed PSF.
format	article
author	Shigemasa ANDO Kazuhiro TANAKA
author_facet	Shigemasa ANDO Kazuhiro TANAKA
author_sort	Shigemasa ANDO
title	In-orbit straylight characterization and correction of optical radiometer using the moon image
title_short	In-orbit straylight characterization and correction of optical radiometer using the moon image
title_full	In-orbit straylight characterization and correction of optical radiometer using the moon image
title_fullStr	In-orbit straylight characterization and correction of optical radiometer using the moon image
title_full_unstemmed	In-orbit straylight characterization and correction of optical radiometer using the moon image
title_sort	in-orbit straylight characterization and correction of optical radiometer using the moon image
publisher	The Japan Society of Mechanical Engineers
publishDate	2019
url	https://doaj.org/article/770db27576ba45bab5fdbfc06b10066b
work_keys_str_mv	AT shigemasaando inorbitstraylightcharacterizationandcorrectionofopticalradiometerusingthemoonimage AT kazuhirotanaka inorbitstraylightcharacterizationandcorrectionofopticalradiometerusingthemoonimage
_version_	1718407593686204416

In-orbit straylight characterization and correction of optical radiometer using the moon image

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