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度矩形网格全球高分辨率海表面温度（Global High Resolution Sea Surface Temperature, GHRSST）三级合并（Level 3 Collated, L3C）数据集，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）的反演数据构建。澳大利亚气象局（Bureau of Meteorology, Bureau）按照国际高分辨率海表面温度小组（International Group for High Resolution SST, GHRSST）制定的GDS2文件格式，针对向日葵8号卫星以实时与延迟模式生产集成海洋观测系统（Integrated Marine Observing System, IMOS）卫星海表面温度（SST）产品。本产品由黎明前夜间时段的IMOS向日葵8号逐小时L3C文件合成得到的多扫描带SSTskin（海表面皮肤温度）反演数据经重处理后构成。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海表面温度（ESA CCI SST）代码，利用辐射传输模型（Radiative Transfer Model, RTTOV12.3）与贝叶斯云清除方法，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面温度。随后，通过对前1小时内的多扫描带观测数据进行合成，生成原生网格上的逐小时SST产品。进一步地，通过从逐小时SST记录中选取质量最高的数据（优先选取距产品标称时刻时间最接近的数值），得到原生网格上的L3C-01day SST场。再将原生网格上的L3C-1day夜间产品重映射至0.02度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数据规范（GHRSST Data Specification, GDS）第2版要求。