DOI: 10.5281/zenodo.4675563
title: RT Dataset -- Distribution and intensity of water ice signature in South Xanadu and Tui Regio

description: This dataset contains all Radiative Transfer (RT) results made for the paper: &gt; Coutelier et al. 2021 - Icarus.<br> &gt; Distribution and intensity of water ice signature in South Xanadu and Tui Regio<br> &gt; doi: 10.1016/j.icarus.2021.114464 The data are stored in 4 zipped-folders named with the VIMS cube id<br> and the tested model (when available): - C1481624349_1_FM_diff_FH.zip<br> - C1481624349_1_FM_eq_FH.zip<br> - C1590648776_1.zip<br> - C1809727868_1.zip In these folders, each VIMS pixel is stored in 2 csv-files, with the following patterns: 1. &lt;CUBE_ID&gt;_&lt;PIXEL_SAMPLE&gt;-&lt;PIXEL_LINE&gt;[_&lt;TESTED_MODEL&gt;]_spectra.csv<br> 2. &lt;CUBE_ID&gt;_&lt;PIXEL_SAMPLE&gt;-&lt;PIXEL_LINE&gt;[_&lt;TESTED_MODEL&gt;]_albedo.csv The first one, starts with a commented header describing the radiative transfer model inputs<br> and outputs: - CUBE_ID: the VIMS cube id (`C1234567890_1` format)<br> - SAMPLE: the pixel sample number.<br> - LINE: the pixel line number.<br> - NKS: the number of correlated-k values used in the RT model.<br> - MAX_VAL_NLEGP: the maximum number Legendre polynomial coefficient in the phase function.<br> - SURFACE: the surface reflection type (Lambert in our case).<br> - SOLARFLUX: the incident flux (adjusted from the incident angle).<br> - ALT_MAX_M: the max altitude of the model grid (in meter).<br> - RADIUS_MONO: The aerosols monomer radius (in meter).<br> - N_MONO: the number of monomers.<br> - DF: the aerosols fractal dimension.<br> - FH: the haze scaling factor.<br> - FM: the mist scaling factor.<br> - HAZE_ALT_TRANS: the altitude of transition between mist and haze (in meter).<br> - X2: the quadratic error between the data and the output.<br> - PHASE: the surface phase angle (in degree).<br> - EMI: the surface emergent angle (in degree).<br> - INC: the surface incident angle (in degree).<br> - SOLAR_MU: Opposite of the cosine of the incident angle (SHDOMPP). Cosine of the incident angle (SPSDISORT)<br> - MU_OUT: the cosine of emergent angle.<br> - PHI_OUT: the azimuth of the emergent angle (in degrees). Then, it contains the original and the retrieved spectra: - Column 1: the VIMS band channel number.<br> - Column 2: the VIMS channel central wavelength (in meter).<br> - Column 3: the original VIMS pixel I/F.<br> - Column 4: the RT model retrieved I/F. The second file, contains only the surface albedo retrieved with the RT model with its associated error: - Column 1: the VIMS channel central wavelength (in meter).<br> - Column 2: the original surface albedo retrieved (negative values were set at 0).<br> - Column 3: the adjusted surface albedo retrieved with wider atmospheric windows. [*]<br> - Column 4: the upper error value of the surface albedo retrieved in the model.<br> - Column 5: the lower error value of the surface albedo retrieved in the model. [*]: In order to keep a record of edge effects. All null values were replaced with NaN but<br> the negative values are kept. Notes<br> ----- For the VIMS cube `C1481624349_1`, we performed two different tests: 1. with different haze and mist parameters FH == FM (default).<br> 2. with the same haze and mist parameters FH != FM. The radiative transfer retrievals were performed with `SHDOMPP` solver except<br> on the VIMS cube `C1809727868_1` where we used `SPSDISORT` solver (suffixed with `_SPS` in the filename). Finally, we also provide a Jupyter Notebook (`Display_cubes.ipynb`) to help visualize the data.<br> This file can be open locally or with Jupyter Notebook Viewer at: https://nbviewer.jupyter.org We provide as well the three calibrated VIMS-IR cube files ('C&lt;CUBE_ID&gt;_ir.cub') we worked with.