The AERONET-colocated aerosol and ocean properties dataset retrieved from DPC-2/GF-5(02) measurements

The second generation of Directional Polarization Camera (DPC-2) onboard the Chinese GF-5(02) satellite was launched in September 2021, features a spatial resolution of 3.3 km at nadir and a swath width of 1850 km, enabling global coverage within two days. This dataset contains aerosol and surface products collected by DPC-2/GF-5(02) for one-year (March 2022 to February 2023).Before retrieval was attempted, pixels containing cloud, snow & ice were identified in the DPC-2/GF-5(02) L1B data and excluded from further retrieval. Satellite data were collected over an area within 50 km radius around the AErosol RObotic NETwork (AERONET) station. This dataset was generated using the Remote sensing of Trace gases and Aerosol Products (RemoTAP) algorithm.The aerosol and ocean properties retrieved from DPC-2/GF-5(02) include: Effective Radius, Effective Variance, Aerosol Layer Height, Aerosol Optical Thickness (AOT), fine-mode (AOT_Fine) and coarse-mode (AOT_Coarse) optical thickness, Ångström Exponent (AE), Single Scattering Albedo (SSA), windspeed, and Chlorophyll-a concentration (Chla). Validation of the DPC-2/GF-5(02) aerosol products against AERONET reference data shows a good agreement, For AOT (550 nm), AE (440-870nm) and SSA (550 nm) retrieval, the Root Mean Square Error (RMSE) is 0.065, 0.318 and 0.035. The global 12-Month-Average (12MA) products are provided at a spatial resolution of 0.2° and cover both land and ocean. The dataset includes AOT at 550 nm, AE between 440 and 670 nm, and SSA at 440 nm. The above data are provided in NetCDF format.

搭载于中国高分五号02星（GF-5(02)）的第二代定向偏振相机（Directional Polarization Camera, DPC-2）于2021年9月发射升空，其天底点空间分辨率为3.3千米，幅宽达1850千米，可在两天内完成全球覆盖。本数据集包含DPC-2/GF-5(02)在2022年3月至2023年2月这一年间采集的气溶胶与地表产品。在开展反演作业前，研究人员已对DPC-2/GF-5(02)的L1B级数据中包含云、雪与冰的像元进行识别并剔除，将其排除在后续反演流程之外。卫星数据的采集范围覆盖气溶胶自动观测网（AErosol RObotic NETwork, AERONET）站点周边50千米半径内的区域。本数据集采用痕量气体遥感与气溶胶产品（Remote sensing of Trace gases and Aerosol Products, RemoTAP）算法生成。从DPC-2/GF-5(02)反演得到的气溶胶与海洋特性参数包括：有效半径、有效方差、气溶胶层高度、气溶胶光学厚度（AOT）、细模态光学厚度（AOT_Fine）与粗模态光学厚度（AOT_Coarse）、安斯特朗指数（AE）、单次散射反照率（SSA）、风速以及叶绿素a浓度（Chla）。以AERONET参考数据为基准对DPC-2/GF-5(02)的气溶胶产品开展验证，结果显示二者匹配度良好。针对550纳米波段气溶胶光学厚度、440~870纳米波段安斯特朗指数以及550纳米波段单次散射反照率的反演结果，其均方根误差（RMSE）分别为0.065、0.318与0.035。本数据集提供空间分辨率为0.2°的全球12个月平均（12-Month-Average, 12MA）产品，覆盖陆地与海洋全域，包含550纳米波段气溶胶光学厚度、440~670纳米波段安斯特朗指数以及440纳米波段单次散射反照率。上述数据均以NetCDF格式存储。

搜集汇总

背景与挑战

背景概述

该数据集基于中国GF-5(02)卫星上的DPC-2仪器，提供了2022年3月至2023年2月全球范围内的气溶胶和海洋特性数据，包括气溶胶光学厚度、单次散射反照率、叶绿素浓度等多个参数，并使用RemoTAP算法生成且经过AERONET验证，确保数据准确性。数据集以NetCDF格式存储，空间分辨率为0.2°，覆盖陆地和海洋，适用于气溶胶和海洋遥感研究。