Publication: A new martian radiative transfer model: applications using in situ measurements
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2017-12-13
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Universidad Complutense de Madrid
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Abstract
El estudio del entorno radiativo en la superficie marciana es fundamental para la comprensión y para una mejor caracterización de los procesos físicos de la atmósfera y el clima del planeta, así como para determinar el impacto biológico de la radiación ultravioleta. Estos dos objetivos son prioritarios en las misiones actuales y futuras a Marte debido a sus implicaciones en la preparación para la exploración humana del planeta. Debido a la importancia de la radiación solar, es necesario poder contar con modelos de transferencia radiativa precisos. Esta precisión es especialmente importante en el cálculo de las radiancias y de los flujos solares en la superficie, los cuales son cantidades fundamentales para caracterizar el entorno radiativo en la superficie y para maximizar el retorno científico de las misiones a Marte. Las simulaciones precisas de la radiación solar en la superficie marciana no sólo requieren modelos de transferencia radiativa detallados y validados, sino también un conocimiento exacto de las propiedades radiativas de los componentes atmosféricos, entre los que el polvo en suspensión es particularmente importante. La combinación de los resultados de los modelos y de las medidas de radiación solar desde la superficie marciana permiten la obtención de las propiedades del polvo en suspensión. El sensor de radiación ultravioleta (UVS) de REMS (Rover Environmental Monitoring Station), a bordo de la misión MSL (Mars Science Laboratory) ha estado midiendo la radiación solar en superficie por primera vez en seis bandas entre 200 y 380 nm. Estas medidas pueden proporcionar información sobre las propiedades y la variabilidad temporal del polvo en suspensión. El rango espectral de este sensor se verá ampliado en misiones futuras, tales como MetNet, que contará con un Sensor de Irradiancia Solar (MetSIS). Otras misiones futuras, tales como ExoMars 2020 y Mars 2020, también contarán con un RDS (Radiation and Dust Sensor)...
The study of the radiative environment at the Martian surface is paramount to understand and better characterize the physical processes of the atmosphere and the climate of the planet, as well as to determine the biological impact of ultraviolet radiation. These two objectives are a priority in current and future Mars missions due to their implications in the preparation for the human exploration of the planet. Due to the importance of solar radiation, accurate radiative transfer models are needed. Accuracy is particularly important for the calculation of the solar radiances and fluxes at the surface, which are key quantities to characterize the radiative environment at the surface and to maximize the scientific return of the missions to Mars. Accurate simulations of the solar radiation at the Martian surface require not only comprehensive and validated radiative transfer models, but also an accurate knowledge of the radiative properties of the atmospheric components, suspended dust being especially important. The combination of model results and solar radiation measurements from the Martian surface can allow the retrieval of the dust aerosol properties. The Ultraviolet Sensor (UVS) of the Rover Environmental Monitoring Station (REMS) on board the Mars Science Laboratory (MSL) mission has been measuring solar radiation at the surface of Mars for the first time in six bands between 200 and 380 nm. These measurements can provide information about the properties and temporal variability of the suspended dust. The spectral range of this sensor will be extended in future missions, such as MetNet, which will contain a Solar Irradiance Sensor (MetSIS). Other future missions, such as ExoMars 2020 and Mars 2020, will also carry a Radiation and Dust Sensor (RDS)...
The study of the radiative environment at the Martian surface is paramount to understand and better characterize the physical processes of the atmosphere and the climate of the planet, as well as to determine the biological impact of ultraviolet radiation. These two objectives are a priority in current and future Mars missions due to their implications in the preparation for the human exploration of the planet. Due to the importance of solar radiation, accurate radiative transfer models are needed. Accuracy is particularly important for the calculation of the solar radiances and fluxes at the surface, which are key quantities to characterize the radiative environment at the surface and to maximize the scientific return of the missions to Mars. Accurate simulations of the solar radiation at the Martian surface require not only comprehensive and validated radiative transfer models, but also an accurate knowledge of the radiative properties of the atmospheric components, suspended dust being especially important. The combination of model results and solar radiation measurements from the Martian surface can allow the retrieval of the dust aerosol properties. The Ultraviolet Sensor (UVS) of the Rover Environmental Monitoring Station (REMS) on board the Mars Science Laboratory (MSL) mission has been measuring solar radiation at the surface of Mars for the first time in six bands between 200 and 380 nm. These measurements can provide information about the properties and temporal variability of the suspended dust. The spectral range of this sensor will be extended in future missions, such as MetNet, which will contain a Solar Irradiance Sensor (MetSIS). Other future missions, such as ExoMars 2020 and Mars 2020, will also carry a Radiation and Dust Sensor (RDS)...
Description
Tesis inédita de la Universidad Complutense de Madrid, Facultad de Ciencias Físicas, Departamento de Física de la Tierra, Astronomía y Astrofísica II, leída el 19-07-2017