Feasibility of retrieving dust properties and total column water vapor from solar spectra measured using a lander camera on mars

Naohiro Manago, Katsuyuki Noguchi, Joji Hashimoto, Hiroki Senshu, Naohito Otobe, Makoto Suzuki, Hiroaki Kuze

Research output: Contribution to journalArticle

Abstract

Dust and water vapor are important constituents in the Martian atmosphere, exerting significant influence on the heat balance of the atmosphere and surface. We have developed a method to retrieve optical and physical properties of Martian dust from spectral intensities of direct and scattered solar radiation to be measured using a multi-wavelength environmental camera onboard a Mars lander. Martian dust is assumed to be composed of silicate-like substrate and hematite-like inclusion, having spheroidal shape with a monomodal gamma size distribution. Error analysis based on simulated data reveals that appropriate combinations of three bands centered at 450, 550, and 675 nm wavelengths and 4 scattering angles of 3°, 10°, 50°, and 120° lead to good retrieval of four dust parameters, namely, aerosol optical depth, effective radius and variance of size distribution, and volume mixing ratio of hematite. Retrieval error increases when some of the observational parameters such as color ratio or aureole are omitted from the retrieval. Also, the capability of retrieving total column water vapor is examined through observations of direct and scattered solar radiation intensities at 925, 935, and 972 nm. The simulation and error analysis presented here will be useful for designing an environmental camera that can elucidate the dust and water vapor properties in a future Mars lander mission.

Original languageEnglish
Article number16
JournalProgress in Earth and Planetary Science
Volume4
Issue number1
DOIs
Publication statusPublished - Jan 1 2017

Fingerprint

Mars
water vapor
dust
error analysis
hematite
solar radiation
wavelength
Martian atmosphere
aureole
heat balance
mixing ratio
optical property
optical depth
silicate
physical property
scattering
aerosol
substrate
atmosphere
simulation

Keywords

  • Direct solar radiation
  • Dust particles
  • Inverse analysis
  • Mars atmosphere
  • Radiative transfer simulation
  • Scattered solar radiation
  • Total column water vapor

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)

Cite this

Feasibility of retrieving dust properties and total column water vapor from solar spectra measured using a lander camera on mars. / Manago, Naohiro; Noguchi, Katsuyuki; Hashimoto, Joji; Senshu, Hiroki; Otobe, Naohito; Suzuki, Makoto; Kuze, Hiroaki.

In: Progress in Earth and Planetary Science, Vol. 4, No. 1, 16, 01.01.2017.

Research output: Contribution to journalArticle

Manago, Naohiro ; Noguchi, Katsuyuki ; Hashimoto, Joji ; Senshu, Hiroki ; Otobe, Naohito ; Suzuki, Makoto ; Kuze, Hiroaki. / Feasibility of retrieving dust properties and total column water vapor from solar spectra measured using a lander camera on mars. In: Progress in Earth and Planetary Science. 2017 ; Vol. 4, No. 1.
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