LIR: Longwave infrared camera onboard the venus orbiter Akatsuki

Tetsuya Fukuhara, Makoto Taguchi, Takeshi Imamura, Masato Nakamura, Munetaka Ueno, Makoto Suzuki, Naomoto Iwagami, Mitsuteru Sato, Kazuaki Mitsuyama, Joji Hashimoto, Ryo Ohshima, Toru Kouyama, Hiroki Ando, Masahiko Futaguchi

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

The Longwave Infrared Camera (LIR) is one of a suite of cameras onboard the Venus orbiter Akatsuki. It will take images of thermal radiation in the wavelength range of 8-12 μm emitted by the Venus cloud tops. The use of an uncooled micro-bolometer array as an infrared image sensor makes LIR a lightweight, small and low-power consumption instrument with a required noise equivalent temperature difference of 0.3 K. Temperature and horizontal wind fields at the cloud-top will be retrieved for both dayside and nightside with equal quality. This will provide key observations to understand the mechanism of super rotation and the thermal budget of the planet. LIR will also monitor variations of the polar dipole and collar which are characteristic thermal features in the Venusian atmosphere. Mechanisms of the upper-cloud formation will be investigated using sequences of close-up images. The morphology of the nightside upper cloud will be studied in detail for the first time.

Original languageEnglish
Pages (from-to)1009-1018
Number of pages10
JournalEarth, Planets and Space
Volume63
Issue number9
DOIs
Publication statusPublished - 2011

Fingerprint

Venus (planet)
Venus
cameras
Venus clouds
superrotation
thermal radiation
bolometers
wind field
budgets
planets
temperature gradients
planet
temperature
dipoles
sensor
wavelength
atmospheres
atmosphere
sensors
wavelengths

Keywords

  • Atmosphere
  • Planet-C
  • Venus

ASJC Scopus subject areas

  • Geology
  • Space and Planetary Science

Cite this

Fukuhara, T., Taguchi, M., Imamura, T., Nakamura, M., Ueno, M., Suzuki, M., ... Futaguchi, M. (2011). LIR: Longwave infrared camera onboard the venus orbiter Akatsuki. Earth, Planets and Space, 63(9), 1009-1018. https://doi.org/10.5047/eps.2011.06.019

LIR : Longwave infrared camera onboard the venus orbiter Akatsuki. / Fukuhara, Tetsuya; Taguchi, Makoto; Imamura, Takeshi; Nakamura, Masato; Ueno, Munetaka; Suzuki, Makoto; Iwagami, Naomoto; Sato, Mitsuteru; Mitsuyama, Kazuaki; Hashimoto, Joji; Ohshima, Ryo; Kouyama, Toru; Ando, Hiroki; Futaguchi, Masahiko.

In: Earth, Planets and Space, Vol. 63, No. 9, 2011, p. 1009-1018.

Research output: Contribution to journalArticle

Fukuhara, T, Taguchi, M, Imamura, T, Nakamura, M, Ueno, M, Suzuki, M, Iwagami, N, Sato, M, Mitsuyama, K, Hashimoto, J, Ohshima, R, Kouyama, T, Ando, H & Futaguchi, M 2011, 'LIR: Longwave infrared camera onboard the venus orbiter Akatsuki', Earth, Planets and Space, vol. 63, no. 9, pp. 1009-1018. https://doi.org/10.5047/eps.2011.06.019
Fukuhara T, Taguchi M, Imamura T, Nakamura M, Ueno M, Suzuki M et al. LIR: Longwave infrared camera onboard the venus orbiter Akatsuki. Earth, Planets and Space. 2011;63(9):1009-1018. https://doi.org/10.5047/eps.2011.06.019
Fukuhara, Tetsuya ; Taguchi, Makoto ; Imamura, Takeshi ; Nakamura, Masato ; Ueno, Munetaka ; Suzuki, Makoto ; Iwagami, Naomoto ; Sato, Mitsuteru ; Mitsuyama, Kazuaki ; Hashimoto, Joji ; Ohshima, Ryo ; Kouyama, Toru ; Ando, Hiroki ; Futaguchi, Masahiko. / LIR : Longwave infrared camera onboard the venus orbiter Akatsuki. In: Earth, Planets and Space. 2011 ; Vol. 63, No. 9. pp. 1009-1018.
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