THEMIS-derived Thermal Inertia of Jezero Crater, Mars

The Thermal Emission Imaging System (THEMIS) inertia mosaic of Jezero Crater was created following the methods of Edwards et al. (2011) and Edwards et al. (2018) with modifications following THEMIS thermal inertia generation in Piqueux et al. (2019). First individual THEMIS images were processed following standard nighttime image processing procedures for THEMIS data (Edwards et al., 2011). Then individual images where processed to thermal inertia using the methods of Edwards et al. (2018), which were updated in Piqueux et al. (2019) to modify the derivation method to use TES albedo as opposed to THEMIS albedo. The outcome of this process results in a product that is similar to the thermal inertia derived by Edwards and Ehlmann (2015) where small scale albedo differences can cause ~20 J/m²/K¹/s^1/2 differences with units of the same thermal inertia. Following the production of thermal inertia, individual images were allowed to be offset by matching the average thermal inertia of overlapping regions, resulting in a maximum of ~20 J/m²/K¹/s^1/2 offset, well within the derivation uncertainty when accounting for THEMIS temperature uncertainty (e.g. Fergason et al., 2006). Images were then mosaicked following the standard processes for creating quantitative mosaics (Edwards et al., 2011) with overlapping regions being linearly blended together via a two dimensional linear ramp. The image is in GeoTIFF format, has a null (black space) value of 0, and units of J/m²/K¹/s^1/2 <br>杰泽罗陨石坑的热发射成像系统（Thermal Emission Imaging System，简称THEMIS）热惯性马赛克数据集，依据Edwards等人（2011）与Edwards等人（2018）的方法构建，并参考Piqueux等人（2019）中THEMIS热惯性生成流程进行了修改优化。首先，按照THEMIS数据的标准夜间图像处理流程（Edwards等人，2011）对单幅THEMIS影像进行预处理。随后，采用Edwards等人（2018）的方法将单幅影像转换为热惯性数据；Piqueux等人（2019）对该方法进行了更新，将反照率数据源从THEMIS反照率调整为TES反照率。该流程生成的结果与Edwards与Ehlmann（2015）推导的热惯性数据结果相近，小尺度反照率差异可导致约20 J·m⁻²·K⁻¹·s^(-1/2)的偏差，二者热惯性单位一致。完成热惯性数据生成后，通过匹配重叠区域的平均热惯性值对单幅影像进行偏移校正，最大偏移量约为20 J·m⁻²·K⁻¹·s^(-1/2)，该误差在考虑THEMIS温度不确定性的情况下，完全处于推导误差范围内（例如Fergason等人，2006）。随后，依据构建定量马赛克的标准流程（Edwards等人，2011）对影像进行拼接，重叠区域通过二维线性斜坡函数进行线性融合。该数据集采用GeoTIFF格式存储，空值（黑色区域）为0，单位为J·m⁻²·K⁻¹·s^(-1/2)。