基于DISORT的火星多光谱制图的表面朗伯反照率的MRO/CRISM反演。传输模式：第1阶段：使用历史气候学的温度，气溶胶不透明度，和大气。压力
MRO/CRISM Retrieval of Surface Lambert Albedos for Multispectral Mapping of Mars with DISORT-based Rad. Transfer Modeling: Phase 1 - Using Historical Climatology for Temperatures, Aerosol Opacities, & Atmo. Pressures
摘要：
我们讨论了基于DISERT的辐射转移管道（“CRISM_LambertALB”）的大气和热校正的MRO/CRISM数据在多光谱映射模式（~200米/像素，72个光谱通道）。目前，在该系统的第一阶段版本中，我们使用气溶胶光学厚度，地面温度和低大气温度，所有这些都来自火星全球探测器热发射光谱仪（MGS-TES）数据的气候学，以及来自MGS火星轨道器激光高度计（MOLA）的表面高度。基于DISort的模式将尘埃和冰气溶胶光学厚度（缩放到CRISM波长范围）、表面压力（由MOLA高度计、MGS-TES低层大气温度计和基于Viking的压力气候学计算）、地面温度、重建的仪器测光角和测量的I/F光谱作为输入，然后输出朗伯朗伯光谱。朗伯光谱在地质学上是有价值的，因为它允许矿物成分的估计。在这里，I/F被定义为CRISM测量的辐射率与火星上太阳辐照度的比值除以$π$。在讨论了管道软件系统的能力和局限性后，我们展示了它在几个多光谱数据立方体上的应用：火星北部冰帽的外部，Tyrrhena Terra，以及凤凰号任务的着陆点附近。对于北极冰冠附近的冰谱，为了正确校正H_{2} O冰带在2.0 $μ$ m附近的CO2吸收，需要考虑气溶胶。在软件开发的未来阶段，我们打算直接使用CRISM数据，以检索气溶胶光学厚度，表面压力和地面温度的时空图。
英文摘要：
We discuss the DISORT-based radiative transfer pipeline ('CRISM_LambertAlb') for atmospheric and thermal correction of MRO/CRISM data acquired in multispectral mapping mode (~200 m/pixel, 72 spectral channels). Currently, in this phase-one version of the system, we use aerosol optical depths, surface temperatures, and lower-atmospheric temperatures, all from climatology derived from Mars Global Surveyor Thermal Emission Spectrometer (MGS-TES) data, and surface altimetry derived from MGS Mars Orbiter Laser Altimeter (MOLA). The DISORT-based model takes as input the dust and ice aerosol optical depths (scaled to the CRISM wavelength range), the surface pressures (computed from MOLA altimetry, MGS-TES lower-atmospheric thermometry, and Viking-based pressure climatology), the surface temperatures, the reconstructed instrumental photometric angles, and the measured I/F spectrum, and then outputs a Lambertian albedo spectrum. The Lambertian albedo spectrum is valuable geologically since it allows the mineralogical composition to be estimated. Here, I/F is defined as the ratio of the radiance measured by CRISM to the solar irradiance at Mars divided by $π$. After discussing the capabilities and limitations of the pipeline software system, we demonstrate its application on several multispectral data cubes: the outer northern ice cap of Mars, Tyrrhena Terra, and near the landing site for the Phoenix mission. For the icy spectra near the northern polar cap, aerosols need to be included in order to properly correct for the CO_2 absorption in the H_{2}O ice bands at wavelengths near 2.0 $μ$m. In future phases of software development, we intend to use CRISM data directly in order to retrieve the spatiotemporal maps of aerosol optical depths, surface pressure and surface temperature.
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