Initial products of Akatsuki 1-μm camera

Naomoto Iwagami, Takeshi Sakanoi, Joji Hashimoto, Kenta Sawai, Shoko Ohtsuki, Seiko Takagi, Kazunori Uemizu, Munetaka Ueno, Shingo Kameda, Shin ya Murakami, Masato Nakamura, Nobuaki Ishii, Takumi Abe, Takehiko Satoh, Takeshi Imamura, Chikako Hirose, Makoto Suzuki, Naru Hirata, Atsushi Yamazaki, Takao M. SatoManabu Yamada, Yukio Yamamoto, Tetsuya Fukuhara, Kazunori Ogohara, Hiroki Ando, Ko ichiro Sugiyama, Hiroki Kashimura, Toru Kouyama

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The status and initial products of the 1-μm camera onboard the Akatsuki mission to Venus are presented. After the successful retrial of Venus’ orbit insertion on Dec. 2015 (5 years after the failure in Dec. 2010), and after a long cruise under intense radiation, damage in the detector seems small and fortunately insignificant in the final quality of the images. More than 600 dayside images have been obtained since the beginning of regular operation on Apr. 2016 although nightside images are less numerous (about 150 in total at three wavelengths) due to the light scattered from the bright dayside. However, data acquisition stopped after December 07, 2016, due to malfunction of the electronics and has not been resumed since then. The 0.90-µm dayside images are of sufficient quality for the cloud-tracking procedure to retrieve wind field in the cloud region. The results appear to be similar to those reported by previous 1-μm imaging by Galileo and Venus Express. The representative altitude sampled for such dayside images is estimated to be 51–55 km. Also, the quality of the nightside 1.01-µm images is sufficient for a search for active volcanism, since interference due to cloud inhomogeneity appears to be insignificant. The quality of the 0.97-µm images may be insufficient to achieve the expected spatial resolution for the near-surface H2O mixing ratio retrievals.[Figure not available: see fulltext.].

Original languageEnglish
Article number6
JournalEarth, Planets and Space
Volume70
Issue number1
DOIs
Publication statusPublished - Dec 1 2018

Fingerprint

cameras
products
Venus (planet)
Venus
orbit insertion
malfunctions
radiation damage
mixing ratios
product
wind field
mixing ratio
inhomogeneity
data acquisition
retrieval
volcanism
spatial resolution
wavelength
interference
detectors
electronics

Keywords

  • Dayside cloud
  • Infrared
  • Nightside surface
  • Venus

ASJC Scopus subject areas

  • Geology
  • Space and Planetary Science

Cite this

Iwagami, N., Sakanoi, T., Hashimoto, J., Sawai, K., Ohtsuki, S., Takagi, S., ... Kouyama, T. (2018). Initial products of Akatsuki 1-μm camera. Earth, Planets and Space, 70(1), [6]. https://doi.org/10.1186/s40623-017-0773-5

Initial products of Akatsuki 1-μm camera. / Iwagami, Naomoto; Sakanoi, Takeshi; Hashimoto, Joji; Sawai, Kenta; Ohtsuki, Shoko; Takagi, Seiko; Uemizu, Kazunori; Ueno, Munetaka; Kameda, Shingo; Murakami, Shin ya; Nakamura, Masato; Ishii, Nobuaki; Abe, Takumi; Satoh, Takehiko; Imamura, Takeshi; Hirose, Chikako; Suzuki, Makoto; Hirata, Naru; Yamazaki, Atsushi; Sato, Takao M.; Yamada, Manabu; Yamamoto, Yukio; Fukuhara, Tetsuya; Ogohara, Kazunori; Ando, Hiroki; Sugiyama, Ko ichiro; Kashimura, Hiroki; Kouyama, Toru.

In: Earth, Planets and Space, Vol. 70, No. 1, 6, 01.12.2018.

Research output: Contribution to journalArticle

Iwagami, N, Sakanoi, T, Hashimoto, J, Sawai, K, Ohtsuki, S, Takagi, S, Uemizu, K, Ueno, M, Kameda, S, Murakami, SY, Nakamura, M, Ishii, N, Abe, T, Satoh, T, Imamura, T, Hirose, C, Suzuki, M, Hirata, N, Yamazaki, A, Sato, TM, Yamada, M, Yamamoto, Y, Fukuhara, T, Ogohara, K, Ando, H, Sugiyama, KI, Kashimura, H & Kouyama, T 2018, 'Initial products of Akatsuki 1-μm camera', Earth, Planets and Space, vol. 70, no. 1, 6. https://doi.org/10.1186/s40623-017-0773-5
Iwagami N, Sakanoi T, Hashimoto J, Sawai K, Ohtsuki S, Takagi S et al. Initial products of Akatsuki 1-μm camera. Earth, Planets and Space. 2018 Dec 1;70(1). 6. https://doi.org/10.1186/s40623-017-0773-5
Iwagami, Naomoto ; Sakanoi, Takeshi ; Hashimoto, Joji ; Sawai, Kenta ; Ohtsuki, Shoko ; Takagi, Seiko ; Uemizu, Kazunori ; Ueno, Munetaka ; Kameda, Shingo ; Murakami, Shin ya ; Nakamura, Masato ; Ishii, Nobuaki ; Abe, Takumi ; Satoh, Takehiko ; Imamura, Takeshi ; Hirose, Chikako ; Suzuki, Makoto ; Hirata, Naru ; Yamazaki, Atsushi ; Sato, Takao M. ; Yamada, Manabu ; Yamamoto, Yukio ; Fukuhara, Tetsuya ; Ogohara, Kazunori ; Ando, Hiroki ; Sugiyama, Ko ichiro ; Kashimura, Hiroki ; Kouyama, Toru. / Initial products of Akatsuki 1-μm camera. In: Earth, Planets and Space. 2018 ; Vol. 70, No. 1.
@article{db14fb9129e64c2b8ce67d2fcb07474a,
title = "Initial products of Akatsuki 1-μm camera",
abstract = "The status and initial products of the 1-μm camera onboard the Akatsuki mission to Venus are presented. After the successful retrial of Venus’ orbit insertion on Dec. 2015 (5 years after the failure in Dec. 2010), and after a long cruise under intense radiation, damage in the detector seems small and fortunately insignificant in the final quality of the images. More than 600 dayside images have been obtained since the beginning of regular operation on Apr. 2016 although nightside images are less numerous (about 150 in total at three wavelengths) due to the light scattered from the bright dayside. However, data acquisition stopped after December 07, 2016, due to malfunction of the electronics and has not been resumed since then. The 0.90-µm dayside images are of sufficient quality for the cloud-tracking procedure to retrieve wind field in the cloud region. The results appear to be similar to those reported by previous 1-μm imaging by Galileo and Venus Express. The representative altitude sampled for such dayside images is estimated to be 51–55 km. Also, the quality of the nightside 1.01-µm images is sufficient for a search for active volcanism, since interference due to cloud inhomogeneity appears to be insignificant. The quality of the 0.97-µm images may be insufficient to achieve the expected spatial resolution for the near-surface H2O mixing ratio retrievals.[Figure not available: see fulltext.].",
keywords = "Dayside cloud, Infrared, Nightside surface, Venus",
author = "Naomoto Iwagami and Takeshi Sakanoi and Joji Hashimoto and Kenta Sawai and Shoko Ohtsuki and Seiko Takagi and Kazunori Uemizu and Munetaka Ueno and Shingo Kameda and Murakami, {Shin ya} and Masato Nakamura and Nobuaki Ishii and Takumi Abe and Takehiko Satoh and Takeshi Imamura and Chikako Hirose and Makoto Suzuki and Naru Hirata and Atsushi Yamazaki and Sato, {Takao M.} and Manabu Yamada and Yukio Yamamoto and Tetsuya Fukuhara and Kazunori Ogohara and Hiroki Ando and Sugiyama, {Ko ichiro} and Hiroki Kashimura and Toru Kouyama",
year = "2018",
month = "12",
day = "1",
doi = "10.1186/s40623-017-0773-5",
language = "English",
volume = "70",
journal = "Earth, Planets and Space",
issn = "1880-5981",
publisher = "Terra Scientific Publishing Company",
number = "1",

}

TY - JOUR

T1 - Initial products of Akatsuki 1-μm camera

AU - Iwagami, Naomoto

AU - Sakanoi, Takeshi

AU - Hashimoto, Joji

AU - Sawai, Kenta

AU - Ohtsuki, Shoko

AU - Takagi, Seiko

AU - Uemizu, Kazunori

AU - Ueno, Munetaka

AU - Kameda, Shingo

AU - Murakami, Shin ya

AU - Nakamura, Masato

AU - Ishii, Nobuaki

AU - Abe, Takumi

AU - Satoh, Takehiko

AU - Imamura, Takeshi

AU - Hirose, Chikako

AU - Suzuki, Makoto

AU - Hirata, Naru

AU - Yamazaki, Atsushi

AU - Sato, Takao M.

AU - Yamada, Manabu

AU - Yamamoto, Yukio

AU - Fukuhara, Tetsuya

AU - Ogohara, Kazunori

AU - Ando, Hiroki

AU - Sugiyama, Ko ichiro

AU - Kashimura, Hiroki

AU - Kouyama, Toru

PY - 2018/12/1

Y1 - 2018/12/1

N2 - The status and initial products of the 1-μm camera onboard the Akatsuki mission to Venus are presented. After the successful retrial of Venus’ orbit insertion on Dec. 2015 (5 years after the failure in Dec. 2010), and after a long cruise under intense radiation, damage in the detector seems small and fortunately insignificant in the final quality of the images. More than 600 dayside images have been obtained since the beginning of regular operation on Apr. 2016 although nightside images are less numerous (about 150 in total at three wavelengths) due to the light scattered from the bright dayside. However, data acquisition stopped after December 07, 2016, due to malfunction of the electronics and has not been resumed since then. The 0.90-µm dayside images are of sufficient quality for the cloud-tracking procedure to retrieve wind field in the cloud region. The results appear to be similar to those reported by previous 1-μm imaging by Galileo and Venus Express. The representative altitude sampled for such dayside images is estimated to be 51–55 km. Also, the quality of the nightside 1.01-µm images is sufficient for a search for active volcanism, since interference due to cloud inhomogeneity appears to be insignificant. The quality of the 0.97-µm images may be insufficient to achieve the expected spatial resolution for the near-surface H2O mixing ratio retrievals.[Figure not available: see fulltext.].

AB - The status and initial products of the 1-μm camera onboard the Akatsuki mission to Venus are presented. After the successful retrial of Venus’ orbit insertion on Dec. 2015 (5 years after the failure in Dec. 2010), and after a long cruise under intense radiation, damage in the detector seems small and fortunately insignificant in the final quality of the images. More than 600 dayside images have been obtained since the beginning of regular operation on Apr. 2016 although nightside images are less numerous (about 150 in total at three wavelengths) due to the light scattered from the bright dayside. However, data acquisition stopped after December 07, 2016, due to malfunction of the electronics and has not been resumed since then. The 0.90-µm dayside images are of sufficient quality for the cloud-tracking procedure to retrieve wind field in the cloud region. The results appear to be similar to those reported by previous 1-μm imaging by Galileo and Venus Express. The representative altitude sampled for such dayside images is estimated to be 51–55 km. Also, the quality of the nightside 1.01-µm images is sufficient for a search for active volcanism, since interference due to cloud inhomogeneity appears to be insignificant. The quality of the 0.97-µm images may be insufficient to achieve the expected spatial resolution for the near-surface H2O mixing ratio retrievals.[Figure not available: see fulltext.].

KW - Dayside cloud

KW - Infrared

KW - Nightside surface

KW - Venus

UR - http://www.scopus.com/inward/record.url?scp=85040377818&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85040377818&partnerID=8YFLogxK

U2 - 10.1186/s40623-017-0773-5

DO - 10.1186/s40623-017-0773-5

M3 - Article

AN - SCOPUS:85040377818

VL - 70

JO - Earth, Planets and Space

JF - Earth, Planets and Space

SN - 1880-5981

IS - 1

M1 - 6

ER -