EMIRS water ice cloud effective radius retrievals for one martian year

Approximately one Martian year (roughly solar longitude, L_s = 130 degrees from Mars Year 36 to 37; November 2021–September 2023) of thermal infrared spectra from the Emirates Mars Infrared Spectrometer (EMIRS) were utilized for this dataset. Retrieval output for each spectrum is stored as a self describing NetCDF4 file (https://www.unidata.ucar.edu/software/netcdf/).

Variable descriptions are included in the file archive. Coordinate variables associated with the observation are latitude, longitude, solar longitude, local true solar time, emission angle of the observation, and the spacecraft clock timestamp when the observation was made. Output from the aerosol retrieval are stored as data variables and include the surface temperature, water-ice optical depth, water-ice optical depth uncertainty, water-ice effective radius, water-ice effective radius uncertainty, surface anisothermality "slope" correction parameter, surface emissivity correction parameter, estimated water condensation level, and a boolean flag indicating the effective radius retrieval passed quality checks and was considered valid.

Each data point in this archive is associated with one unique EMIRS spectrum as indicated by the onboard spacecraft clock. Data points included here are those which passed quality checks for water-ice cloud optical depth. Data points which did not pass quality checks for the effective radius retrieval are indicated with the "refficevalid" flag.

Description of the retrieval and data in this archive can be found in the manuscript "Spatial and temporal variability of martian water-ice cloud effective radius in EMIRS thermal infrared observations" by Samuel A. Atwood, Michael D. Smith, Michael J. Wolff, Khalid Badri, Christopher S. Edwards, Philip R. Christensen, Alain SJ. Khayat, and M. R. El-Maarry, accepted to Icarus.

本数据集采用阿联酋火星红外光谱仪（Emirates Mars Infrared Spectrometer, EMIRS）获取的约1个火星年的热红外光谱数据，对应火星年36至37，太阳经度L_s=130°，时间范围为2021年11月至2023年9月。每条光谱的反演结果均存储为自描述式NetCDF4文件，相关说明可参阅https://www.unidata.ucar.edu/software/netcdf/。

文件归档中包含各变量的详细说明。与本次观测相关的坐标变量包括纬度、经度、太阳经度、本地真太阳时、观测发射角以及观测时刻的航天器时钟时间戳。气溶胶反演的结果以数据变量形式存储，涵盖地表温度、水冰光学厚度、水冰光学厚度不确定度、水冰有效半径、水冰有效半径不确定度、地表非各向同性"斜率"校正参数、地表发射率校正参数、估算的水汽凝结高度，以及一个布尔标记，用于指示水冰有效半径反演是否通过质量检验并被判定为有效。

本归档中的每个数据点均对应唯一的EMIRS光谱，由机载航天器时钟标记予以区分。本数据集收录的是通过水冰云光学厚度质量检验的数据点。未通过有效半径反演质量检验的数据点将通过"refficevalid"标记予以标注。

本归档中反演方法与数据的详细说明可参阅已被《Icarus》录用的论文《Spatial and temporal variability of martian water-ice cloud effective radius in EMIRS thermal infrared observations》，作者为Samuel A. Atwood、Michael D. Smith、Michael J. Wolff、Khalid Badri、Christopher S. Edwards、Philip R. Christensen、Alain SJ. Khayat以及M. R. El-Maarry。