IMOS - SRS - 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温度（Global High Resolution Sea Surface Temperature, GHRSST）3级融合（Level 3 collated, L3C）数据集，数据基于向日葵8号（Himawari-8）卫星搭载的先进向日葵成像仪（Advanced Himawari Imager, AHI）的反演结果。澳大利亚气象局（Bureau of Meteorology, Bureau）以实时与延迟处理模式，按照全球高分辨率海表温度国际工作组（International Group for High Resolution SST, GHRSST）制定的GDS2文件格式，生成面向向日葵8号卫星的集成海洋观测系统（Integrated Marine Observing System, IMOS）卫星海表温度产品。本产品由黎明前夜间时段的IMOS向日葵8号逐小时L3C文件融合得到的经再处理的多扫描带海表皮肤温度（SSTskin）反演数据组成。每10分钟，科研人员将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）海表温度代码，利用辐射传输模型（Radiative Transfer Model, RTTOV12.3）与贝叶斯云清除算法，对向日葵8号卫星的全圆盘观测数据进行处理以反演海表温度。随后通过对前一小时的多扫描带观测数据进行融合，生成原始网格下的逐小时产品。进一步地，通过从逐小时海表温度记录中遴选质量最高的数据，并优先选取距离产品标称时刻时间最近的数值，得到原始网格下的L3C-01day海表温度场。随后将原始网格下的L3C-1day夜间产品重映射至0.02°的IMOS网格，以生成IMOS L3C-1day夜间产品（Govekar等人，2021，https://www.foo.org.au/wp-content/uploads/2021/11/Govekar_FOO_2021.pdf）。本产品格式符合全球高分辨率海表温度数据规范（GHRSST Data Specification, GDS）2.0版本要求。