Aerosol vertical distribution on Mars from SPICAM IR/MEX occultations (MY28-36)

Includes a list of orbits, and extinction profiles at 1158 nm in km-1, effective radius in mum, effective variance, number density in cm-3, and mass mixing ratio in kg/kg for dust and H2O ice aerosols from SPICAM/Mars-Express solar occultation observations from MY28 to MY36. The errors of effective radius and density are not symmetrical. The error1 determines the length below the data point and the error2 determines the length above the data point. The nature of aerosol can't be distinguished by SPICAM IR. The Martian Climate Model and MCS/MRO observations were considered to distinguish the H2O ice during single observation.
Data contains folders with the list of orbits and aerosol properties and extinction profiles
for each occultation of MEX where SPICAM IR had measurements.
Effective radius, variance, MMRs data files are named "SPICAM_XXXXXAY_aerosol_profiles.txt",
extinction data files are named "SPICAM_1158nm_oXXXXXAY_extinction_profiles.txt",
where XXXXX is the decimal orbit number,
Y is the occultation number in orbit.
The list of orbits with latitude, longitude, Ls and local time averaged between 0 and 100 km during an occultation is given in "list_of_orbits_occultations_SPICAMIR_MEX_MY28-36.txt".

本数据集收录了火星年（Mars Year, MY）28至36期间，由火星快车（Mars-Express）搭载的SPICAM载荷开展的太阳掩星观测所获取的尘埃与水冰气溶胶相关数据，包括：1158 nm波长处的消光剖面（单位：km⁻¹）、有效半径（单位：μm）、有效方差、数密度（单位：cm⁻³）以及质量混合比（mass mixing ratio，简称MMR，单位：kg/kg）。有效半径与数密度的误差分布并不对称：error1对应数据点下方的误差区间长度，error2对应数据点上方的误差区间长度。SPICAM红外波段无法直接区分气溶胶组分，需结合火星气候模型（Martian Climate Model）与火星气候探测仪（Mars Climate Sounder, MCS）、火星勘测轨道器（Mars Reconnaissance Orbiter, MRO）的观测数据，在单次掩星观测中甄别出水冰气溶胶。
数据集按火星快车（MEX）每次SPICAM红外波段有有效测量的掩星事件整理为对应文件夹，每个文件夹内含轨道列表、气溶胶特性参数及消光剖面文件。
有效半径、有效方差与质量混合比的数据文件命名格式为"SPICAM_XXXXXAY_aerosol_profiles.txt"，消光剖面数据文件命名格式为"SPICAM_1158nm_oXXXXXAY_extinction_profiles.txt"，其中XXXXX为十进制轨道编号，Y为该轨道内的掩星事件序号。
文件"list_of_orbits_occultations_SPICAMIR_MEX_MY28-36.txt"中给出了单次掩星事件期间0至100 km高度范围内平均的轨道纬度、经度、太阳经度（Ls）与地方时信息。