GOSAT V9 Fusion Dataset

This dataset contains the calibrated GOSAT XCO2 retrievals against the OCO-2 XCO2 benchmark based on the machine learning models, which is a harmonized dataset that aligns more congruently with OCO-2 XCO2 retrievals. Such integration is pivotal for enhancing observational constraints in carbon flux inversions. The source of Level 2 products for both satellites is NASA's Goddard Earth Science Data and Information Services Center (GES-DISC), accessible at https://disc.gsfc.nasa.gov/. The dataset is shared in the format of the ACOS_L2_Lite_FP product (GOSAT Level 2 XCO2 product) with retrievals of poor quality having been filtered out. The latest version of the dataset features modifications in the model adjustment process and also includes recalibrated uncertainties for each observation resulting from model corrections. The data time range is from April 2009 to June 2020, and the folders are divided by year.

本数据集包含基于机器学习模型、针对轨道碳观测卫星2号（OCO-2）柱平均二氧化碳混合比（XCO2）基准校准得到的温室气体观测卫星（GOSAT）XCO2反演结果，是一套与OCO-2 XCO2反演结果匹配度更高的协调统一数据集。此类数据整合对于强化碳通量反演中的观测约束能力至关重要。两颗卫星的二级产品数据源均来自美国国家航空航天局（NASA）戈达德地球科学数据与信息服务中心（GES-DISC），数据获取地址为https://disc.gsfc.nasa.gov/。本数据集以ACOS_L2_Lite_FP产品（GOSAT二级XCO2产品）格式共享，并已过滤掉质量不佳的反演结果。该数据集的最新版本对模型调整流程进行了优化，同时新增了由模型校正带来的各观测值的重新校准不确定度。数据集的时间范围为2009年4月至2020年6月，数据文件夹按年份划分。