Improved atmospheric 3D BSDF model in earthlike exoplanet using ray-tracing based method

Dongok Ryu; Sug Whan Kim; Sehyun Seong

doi:10.1117/12.930260

Improved atmospheric 3D BSDF model in earthlike exoplanet using ray-tracing based method

Dongok Ryu, Sug Whan Kim, Sehyun Seong

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

3 Citations (Scopus)

Abstract

The studies on planetary radiative transfer computation have become important elements to disk-averaged spec- tral characterization of potential exoplanets. In this paper, we report an improved ray-tracing based atmospheric simulation model as a part of 3-D earth-like planet model with 3 principle sub-components i.e. land, sea and atmosphere. Any changes in ray paths and their characteristics such as radiative power and direction are com- puted as they experience reection, refraction, transmission, absorption and scattering. Improved atmospheric BSDF algorithms uses Q.Liu's combined Rayleigh and aerosol Henrey-Greenstein scattering phase function. The input cloud-free atmosphere model consists of 48 layers with vertical absorption profiles and a scattering layer with their input characteristics using the GIOVANNI database. Total Solar Irradiance data are obtained from Solar Radiation and Climate Experiment (SORCE) mission. Using aerosol scattering computation, we first tested the atmospheric scattering effects with imaging simulation with HRIV, EPOXI. Then we examined the computational validity of atmospheric model with the measurements of global, direct and diffuse radiation taken from NREL(National Renewable Energy Laboratory)s pyranometers and pyrheliometers on a ground station for cases of single incident angle and for simultaneous multiple incident angles of the solar beam.

Original language	English
Title of host publication	Instruments, Methods, and Missions for Astrobiology XV
DOIs	https://doi.org/10.1117/12.930260
Publication status	Published - 2012
Event	Instruments, Methods, and Missions for Astrobiology XV - San Diego, CA, United States Duration: 2012 Aug 14 → 2012 Aug 15

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	8521
ISSN (Print)	0277-786X

Other

Other	Instruments, Methods, and Missions for Astrobiology XV
Country	United States
City	San Diego, CA
Period	12/8/14 → 12/8/15

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

UN SDGs

This output contributes to the following Sustainable Development Goal(s)

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10.1117/12.930260

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title = "Improved atmospheric 3D BSDF model in earthlike exoplanet using ray-tracing based method",

abstract = "The studies on planetary radiative transfer computation have become important elements to disk-averaged spec- tral characterization of potential exoplanets. In this paper, we report an improved ray-tracing based atmospheric simulation model as a part of 3-D earth-like planet model with 3 principle sub-components i.e. land, sea and atmosphere. Any changes in ray paths and their characteristics such as radiative power and direction are com- puted as they experience reection, refraction, transmission, absorption and scattering. Improved atmospheric BSDF algorithms uses Q.Liu's combined Rayleigh and aerosol Henrey-Greenstein scattering phase function. The input cloud-free atmosphere model consists of 48 layers with vertical absorption profiles and a scattering layer with their input characteristics using the GIOVANNI database. Total Solar Irradiance data are obtained from Solar Radiation and Climate Experiment (SORCE) mission. Using aerosol scattering computation, we first tested the atmospheric scattering effects with imaging simulation with HRIV, EPOXI. Then we examined the computational validity of atmospheric model with the measurements of global, direct and diffuse radiation taken from NREL(National Renewable Energy Laboratory)s pyranometers and pyrheliometers on a ground station for cases of single incident angle and for simultaneous multiple incident angles of the solar beam.",

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Ryu, D, Kim, SW & Seong, S 2012, Improved atmospheric 3D BSDF model in earthlike exoplanet using ray-tracing based method. in Instruments, Methods, and Missions for Astrobiology XV., 85210F, Proceedings of SPIE - The International Society for Optical Engineering, vol. 8521, Instruments, Methods, and Missions for Astrobiology XV, San Diego, CA, United States, 12/8/14. https://doi.org/10.1117/12.930260

Improved atmospheric 3D BSDF model in earthlike exoplanet using ray-tracing based method. / Ryu, Dongok; Kim, Sug Whan; Seong, Sehyun.

Instruments, Methods, and Missions for Astrobiology XV. 2012. 85210F (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 8521).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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Improved atmospheric 3D BSDF model in earthlike exoplanet using ray-tracing based method

Abstract

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