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GHRSST L3C NOAA/ACSPO Himawari-09 AHI Pacific Ocean Region Sea Surface Temperature v2.90 dataset (GDS version 2)

Published by NOAA National Centers for Environmental Information | National Oceanic and Atmospheric Administration, Department of Commerce | Metadata Last Checked: January 29, 2026 | Last Modified: 2026-01-28T00:00:00.000+00:00
The H09-AHI-L3C-ACSPO-v2.90 dataset contains the Subskin Sea Surface Temperature (SST) produced by the NOAA ACSPO system from the Advanced Himawari Imager (AHI; largely identical to GOES-R/ABI) onboard the Himawari-9 (H09) satellite. The H09 is a Japanese weather satellite, the 9th of the Himawari geostationary weather satellite operated by the Japan Meteorological Agency. It was launched on November 2, 2016 into its nominal position at 140.7-deg E, and declared operational on December 13, 2022, replacing the Himawari-8. The AHI is the primary instrument on the Himawari Series for imaging Earth’s weather, oceans, and environment with high temporal and spatial resolutions. The H09-AHI-L3C-ACSPO-v2.90 dataset is a gridded version of the ACSPO H09-AHI-L2P-ACSPO-v2.90 dataset. The L3C (Level 3 Collated) data is mapped on 0.02-deg lat-lon grid and outputs 24 hourly granules per day, with a daily volume of 0.7 GB/day. Valid SSTs are found over oceans, sea, lakes or rivers, with fill values reported elsewhere. All valid SSTs in L3C are recommended for users, although data over internal waters may not have enough in situ data to be adequately validated. Per GDS2 specifications, two additional Sensor-Specific Error Statistics layers (bias and standard deviation) are reported in each pixel with valid SST. The ACSPO H09/AHI L3C product is validated against iQuam in situ data (Xu and Ignatov, 2014) and continuously monitored in the NOAA SQUAM system (Dash et al, 2010). The NRT files are replaced with Delayed Mode (DM) files, with a latency of approximately 2-months. File names remain unchanged, and DM vs NRT can be identified by different time stamps and global attributes inside the files (MERRA for DM instead of GFS for atmospheric profiles, and same day CMC L4 analyses in DM instead of one-day delayed in NRT processing).

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Sea Arabian Sea Bay of Bengal Bering Sea Bismarck Sea Coral Sea East China Sea (Tung Hai) East Indian Archipelago Great Australian Bight Gulf of Alaska Gulf of Thailand Indian Ocean Japan Sea Malacca and Singapore Straits North Pacific Ocean Philippine Sea Sea of Okhotsk Seto Naikai (Inland Sea) Solomon Sea South China Sea (Nan Hai) South Pacific Ocean Southern Ocean Tasman Sea Yellow Sea (Hwang Hai) oceanography DOC/NOAA/NESDIS/STAR > Center for Satellite Applications and Research, NESDIS, NOAA, U.S. Department of Commerce NASA/JPL/PODAAC > Physical Oceanography Distributed Active Archive Center, Jet Propulsion Laboratory, NASA GHRSST > Group for High Resolution Sea Surface Temperature EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WINDS > SURFACE WINDS > WIND SPEED EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > SEA SURFACE TEMPERATURE Earth Science > Oceans > Ocean Temperature > Sea Surface Temperature > Sea Surface Subskin Temperature AHI > Advanced Himawari Imager Himawari-9 OCEAN > INDIAN OCEAN OCEAN > INDIAN OCEAN > ARABIAN SEA OCEAN > INDIAN OCEAN > BAY OF BENGAL OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > BERING SEA OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > GULF OF ALASKA OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > SEA OF JAPAN OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > SEA OF OKHOTSK OCEAN > PACIFIC OCEAN > SOUTH PACIFIC OCEAN OCEAN > PACIFIC OCEAN > WESTERN PACIFIC OCEAN > EAST CHINA SEA OCEAN > PACIFIC OCEAN > WESTERN PACIFIC OCEAN > SOUTH CHINA AND EASTERN ARCHIPELAGIC SEAS OCEAN > PACIFIC OCEAN > WESTERN PACIFIC OCEAN > SOUTH CHINA SEA OCEAN > PACIFIC OCEAN > WESTERN PACIFIC OCEAN > YELLOW SEA OCEAN > SOUTHERN OCEAN

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