IMOS - Satellite Remote Sensing - SST - L3C - Himawari-8 - 1 day - night time - 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. Further, L3C-01day SST fields on native grid are obtained by selecting the highest quality data from the hourly SST records with priority being given to the value the closest in time to the product nominal hour. The L3C-1day night product on native grid is then remapped over the 0.02-degree IMOS grid to compose IMOS L3C-1day night 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°矩形网格全球高分辨率海表面温度（Group for High Resolution SST, GHRSST）第三级合并（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，简称Bureau）可实时及延迟模式生成基于葵花八号卫星的综合海洋观测系统（Integrated Marine Observing System, IMOS）卫星海表面温度产品，产品格式符合全球高分辨率海表面温度工作组（GHRSST）的GDS2文件规范。本产品由夜间（黎明前）时段IMOS葵花八号逐小时L3C文件合成的多幅扫描带海表面表层温度（SSTskin）反演结果经再处理后得到。每10分钟，系统将利用辐射传输模型12.3版（Radiative Transfer Model 12.3, RTTOV12.3）及基于雷丁大学开发的欧洲空间局气候变化倡议海表面温度（European Space Agency Climate Change Initiative SST, ESA CCI SST）代码实现的贝叶斯云清除方法，对葵花八号全圆盘观测数据进行海表面温度反演处理。随后通过对前一小时内的多幅扫描带数据进行合成，生成原生网格（native grid）逐小时产品。进一步，从逐小时海表面温度记录中选取质量最高的数据（优先选择距产品标称时刻时间最近的数值），可得到原生网格上的L3C-01day海表面温度场。再将原生网格上的L3C-1day夜间产品重映射至0.02°IMOS网格，从而合成IMOS L3C-1day夜间产品（Govekar等，2021，https://www.foo.org.au/wp-content/uploads/2021/11/Govekar_FOO_2021.pdf）。本产品格式符合全球高分辨率海表面温度工作组（GHRSST）数据规范（GDS）2.0版本。