TROPOMI NO2 tropospheric column density and precision - regridded on the Mediterranean Sea

The dataset contains the processed data of open-source level-2 TROPOMI NO2 measurements on the Mediterranean Sea area, publicly available via the Copernicus S5P hub (https://s5phub.copernicus.eu) and retrieved by TROPOspheric Monitoring Instrument (TROPOMI) on board the Copernicus Sentinel-5 Precursor satellite.<br>The dataset is regridded, day-averaged, and provided by Airbus Defence and Space Netherlands. That is, all irregularly gridded L2 data is interpolated on a regular grid defined in World Geodetic System 1984 (WGS84). In addition, if the same measurement pixel is available with valid data from a different point in time on the same day, the result contains multiple contributes of the same weight but with different scaled values, such that time averaging is performed as well.<br>The dataset has four variables: nitrogendioxide_tropospheric_column; nitrogendioxide_tropospheric_column_precision; nitrogendioxide_slant_column_density; nitrogendioxide_slant_column_density_precision.Each variable is constructed in three dimensions: Time; Latitude; Longitude.

本数据集涵盖地中海区域的开源二级TROPOMI二氧化氮观测处理数据，可通过哥白尼S5P数据中心（Copernicus S5P hub，https://s5phub.copernicus.eu）公开获取，由搭载于哥白尼哨兵-5P卫星的对流层监测仪（TROPOspheric Monitoring Instrument，简称TROPOMI）反演得到。<br>本数据集经重网格化与日平均处理，由荷兰空客防务与航天公司（Airbus Defence and Space Netherlands）提供。具体而言，所有非规则网格化的二级数据均被插值至1984世界大地测量系统（World Geodetic System 1984，简称WGS84）定义的规则网格中。此外，若同一观测像元在当日不同时刻存在有效数据，则结果将包含多组权重一致但缩放值各异的贡献项，以同步完成时间平均处理。<br>本数据集包含四个变量：对流层二氧化氮柱浓度（nitrogendioxide_tropospheric_column）、对流层二氧化氮柱浓度精度（nitrogendioxide_tropospheric_column_precision）、二氧化氮斜柱浓度（nitrogendioxide_slant_column_density）以及二氧化氮斜柱浓度精度（nitrogendioxide_slant_column_density_precision）。每个变量均采用三维结构构建，维度分别为时间、纬度与经度。