IMOS - Satellite Remote Sensing - SST - L3C - Himawari-8 - 1 hour - Australia

This is a regional GHRSST level 3 collated (L3C) dataset on 0.02-degree rectangular grid over the Australasian domain (70E to 190E, 70S to 20N) based on retrievals from the AHI imager on board Himawari-8 satellite. The Bureau of Meteorology (Bureau) produces Integrated Marine Observing System (IMOS) satellite SST products in the International Group for High Resolution SST (GHRSST) GDS2 file formats for Himawari-8 in real time and delayed mode. This product is composed of reprocessed multi-swath SSTskin retrievals obtained from compositing IMOS Himawari-8 hourly L3C files over the night (before dawn). Every 10 minutes, the Himawari-8 full disk is processed to retrieve SSTs by using the Radiative Transfer Model (RTTOV12.3) and Bayesian cloud clearing method based on the ESA CCI SST code developed at the University of Reading. The hourly product on native grid is then produced by compositing over multiple swaths for the previous 1 hour by selecting the highest quality data with priority being given to the value the closest in time to the product nominal hour. The L3C-01hour product on native grid is then remapped over the 0.02-degree IMOS grid to compose IMOS L3C-01hour product (Govekar et al., 2021, https://www.foo.org.au/wp-content/uploads/2021/11/Govekar_FOO_2021.pdf). The product format is compliant with the GHRSST Data Specification (GDS) version 2.

本数据集为覆盖澳大拉西亚区域（70°E至190°E、70°S至20°N）的0.02°经纬度矩形网格国际高分辨率海表温度工作组（Group for High Resolution SST, GHRSST）第3级合并（Level 3 Collated, L3C）数据集，其数据基于葵花八号（Himawari-8）卫星搭载的先进葵花成像仪（Advanced Himawari Imager, AHI）的反演结果。澳大利亚气象局（Bureau of Meteorology, Bureau）以实时与延迟运行模式，采用国际高分辨率海表温度工作组（GHRSST）数据规范（Data Specification, GDS）2版文件格式，生成针对葵花八号卫星的海洋综合观测系统（Integrated Marine Observing System, IMOS）卫星海表温度（Sea Surface Temperature, SST）产品。本产品由经再处理的多扫描带海表皮温度（SSTskin）反演数据合成而来，合成过程为将黎明前夜间时段的IMOS葵花八号逐小时L3C文件进行拼接整合。每10分钟，科研人员会对葵花八号卫星的全圆盘观测数据进行处理，基于雷丁大学开发的欧洲空间局气候变化倡议（European Space Agency Climate Change Initiative, ESA CCI）SST代码，利用辐射传输模型（Radiative Transfer Model, RTTOV12.3）与贝叶斯云清除算法反演海表温度。随后，通过对前1小时内的多扫描带观测数据进行合成，并选取质量最高的数据（优先选用与产品标称时刻时间差最小的反演值），生成原始网格下的逐小时产品。随后将原始网格下的L3C-01小时产品重映射至0.02°的IMOS网格，从而合成IMOS L3C-01小时产品（Govekar等人，2021，https://www.foo.org.au/wp-content/uploads/2021/11/Govekar_FOO_2021.pdf）。本产品格式符合GHRSST数据规范（GDS）2.0版本要求。