CERES Regionally Averaged TOA Fluxes, Clouds and Aerosols Hourly NOAA-20 Edition 1C

CER_SSF1deg-Hour_NOAA20-VIIRS_Edition1C is the NOAA-20 Clouds and the Earth's Radiant Energy System (CERES) Level 3 Single Scanner Footprint (SSF) Edition1C observed Top of Atmosphere (ToA) broadband radiances and fluxes data product. The SSF One Degree (SSF1deg) Hour provides data hourly on a 1-degree latitude and longitude global grid from the NOAA-20 CERES Flight Model 6(FM6) instantaneous footprint data. The last CERES instrument, Flight Model (FM) 6, was launched on board the Joint Polar-Orbiting Satellite System 1 (JPSS-1) satellite, now known as NOAA-20, on November 18, 2017. The data product begins May 1, 2018, and is in progress. The product is distributed in daily Hierarchical Data Format (HDF) 4 files. The file contains data, where observed, for each 24 hours of the day and provides global coverage over a day.The SSF1deg-Hour granule contains instantaneous gridded CERES FM6 Earth viewing unfiltered radiances for the shortwave (SW), longwave (LW) (determined from the difference between total and SW), and LW channel broadband. The SW, LW, and LW-channel radiances at spacecraft altitude are converted to Top of Atmosphere (ToA) fluxes based on the co-located Visible Infrared Imaging Radiometer Suite (VIIRS) imager-defined scene. The ToA fluxes are provided for both clear-sky and total-sky conditions. The incoming daily solar irradiance is from the Solar Radiation and Climate Experiment (SORCE) and Total Solar Irradiance (TSI). These ToA fluxes are used to estimate surface fluxes. The VIIRS radiances are used with CERES-specific cloud mask, and cloud property retrievals are stratified into four atmospheric layers: surface to 700 mb, 700 mb to 500 mb, 500 to 300 mb, and above 300 mb along with the total. Each cloud layer has properties such as amount, height, temperature, pressure, optical depth, emissivity, phase, water path, and water particle size. The cloud properties are averaged for day and night (24-hour) and day-only periods.This product uses the instantaneous footprint-level product, CER_SSF_NOAA20-VIIRS_Edition1C, as input. It is the basis for the SSF1deg-Day and SSF1deg-Month NOAA20-VIIRS_Edition1C products, which provide daily and monthly averages by temporally interpolating between CERES observations.

Data and Resources

Additional Info

Field	Value
Maintainer	Earthdata Forum
Last Updated	August 11, 2025, 19:44 (UTC)
Created	April 7, 2025, 18:50 (UTC)
accessLevel	public
bureauCode	{026:00}
catalog_conformsTo	https://project-open-data.cio.gov/v1.1/schema
harvest_object_id	5a2e2986-d5e4-4dc9-ac70-f97dc8fc4d86
harvest_source_id	44069cc8-d515-495f-9ea4-b67f76a0a7cb
harvest_source_title	Science Discovery Engine
identifier	10.5067/NOAA20/CERES/SSF1DEGHOUR_L3.001C
landingPage	https://doi.org/10.5067/NOAA20/CERES/SSF1DEGHOUR_L3.001C
modified	2025-02-21
programCode	{026:000}
publisher	NASA/LARC/SD/ASDC
references	{https://asdc.larc.nasa.gov/documents/ceres/guide/cer_ssf1deg-hour.pdf,https://asdc.larc.nasa.gov/static/images/project_logos/ceres.png}
resource-type	Dataset
source_datajson_identifier	true
source_hash	81177da5a668b103706c75125a794b4753d0c71faaf843db2c9665be3219b846
source_schema_version	1.1
spatial	["CARTESIAN",[{"Boundary":{"Points":[{"Latitude":-90,"Longitude":-180},{"Latitude":-90,"Longitude":180},{"Latitude":90,"Longitude":180},{"Latitude":90,"Longitude":-180},{"Latitude":-90,"Longitude":-180}]}}]]
temporal	2018-05-01/2018-05-01
theme	{"Earth Science"}