ASDC | CER_SYN1deg-MHour_Terra-NOAA20

CERES Level 3

Entry Title: CERES and GEO-Enhanced TOA, Within-Atmosphere and Surface Fluxes, Clouds and Aerosols Monthly-Averaged 1-Hourly Terra-NOAA20 Edition4A

Entry ID: CER_SYN1deg-MHour_Terra-NOAA20_Edition4A

Aerosols Clouds Radiation Budget

Description

CER_SYN1deg-MHour_Terra-NOAA20_Edition4A is the Clouds and the Earth's Radiant Energy System (CERES) and geostationary (GEO)-Enhanced Top-of-Atmosphere (TOA), Within-Atmosphere and Surface Fluxes, Clouds and Aerosols Monthly-Averaged 1-Hourly Terra-Aqua Edition4A data product. Data was collected using the CERES Imaging Radiometers on Geostationary Satellites; CERES Flight Model 1 (FM1), FM2, CERES Scanner, and Moderate-Resolution Imaging Spectroradiometer (MODIS) on Terra; and FM6 CERES Scanner, and VIIRS on NOAA-20. Data collection for this product is ongoing.

The CERES Synoptic (SYN) 1 degree (SYN1deg) products provide CERES-observed temporally interpolated TOA radiative fluxes and coincident MODIS-derived cloud and aerosol properties and include geostationary-derived cloud properties and broadband fluxes that have been carefully normalized with CERES fluxes in order to maintain the CERES calibration. They also contain computed initial TOA, in-atmosphere, and surface fluxes and computed fluxes that have been adjusted or constrained to the CERES-observed TOA fluxes. The computed fluxes are produced using the Langley Fu-Liou radiative transfer model. Computations use MODIS and geostationary satellite cloud properties along with atmospheric profiles provided by the Global Modeling and Assimilation Office (GMAO). The adjustments to clouds and atmospheric properties are also provided. The computations are made for all-sky, clear-sky, pristine (clear-sky without aerosols), and all-sky without aerosol conditions. This product provides parameters on a monthly-averaged one-hourly temporal resolution and 1°-regional spatial scales. Fluxes are provided for clear-sky and all-sky conditions in the longwave (LW), shortwave (SW), and window (WN) regions.

The CERES SYN1deg products use 1-hourly radiances and cloud property data from geostationary (GEO) imagers to more accurately model variability between CERES observations. To use GEO data to enhance diurnal sampling, several steps are involved. First, GEO radiances are cross-calibrated with the MODIS imager using only data that is coincident in time and ray-matched in angle. Next, the GEO cloud retrievals are inferred from the calibrated GEO radiances. The GEO radiances are converted from narrowband to broadband using empirical regressions and then to broadband GEO TOA fluxes using Angular Distribution Models (ADMs) and directional models. To ensure GEO and CERES TOA fluxes are consistent, a normalization technique is used. Instantaneous matched gridded fluxes from CERES and GEO are regressed against one another over a month from 5°x5 ° latitude-longitude regions. The regression relation is then applied to all GEO fluxes to remove biases that depend upon cloud amount, solar and view zenith angles, and regional dependencies. The regional means are determined for 1° equal-angle grid boxes calculated by first interpolating each parameter for any missing times of the CERES/GEO observations to produce a complete 1-hourly time series for the month. Monthly means are calculated using the combination of observed and interpolated parameters from all days containing at least one CERES observation.

CERES is a key component of the Earth Observing System (EOS) program. The CERES instruments provide radiometric measurements of the Earth's atmosphere from three broadband channels. The CERES missions are a follow-on to the successful Earth Radiation Budget Experiment (ERBE) mission. The first CERES instrument, protoflight model (PFM), was launched on November 27, 1997 as part of the Tropical Rainfall Measuring Mission (TRMM). Two CERES instruments (FM1 and FM2) were launched into polar orbit on board the Earth Observing System (EOS) flagship Terra on December 18, 1999. Two additional CERES instruments (FM3 and FM4) were launched on board Earth Observing System (EOS) Aqua on May 4, 2002. The CERES FM5 instrument was launched on board the Suomi National Polar-orbiting Partnership (NPP) satellite on October 28, 2011. The newest CERES instrument (FM6) was launched on board the Joint Polar-Orbiting Satellite System 1 (JPSS-1) satellite, now called NOAA-20, on November 18, 2017.

DOI

10.5067/TERRA-NOAA20/CERES/SYN1deg-MHour_L3.004A

View Citations

VIEW RELATED INFORMATION

ALGORITHM THEORETICAL BASIS DOCUMENT (ATBD)

NASA EOS ATB Documents: CERES

ANOMALIES

CERES/Terra Regional Mean TOA Flux Uncertainties

DATA CITATION POLICY

How to cite ASDC data

DATA QUALITY

Quality Summary: CERES_SYN1deg_Ed4A (10/3/2017)

GENERAL DOCUMENTATION

HOW-TO

Directions on downloading and installing the HDF libraries

PROCESSING HISTORY

CERES Processing Level Details
CERES Product Level Details

PRODUCTION HISTORY

PUBLICATIONS

Angular Distribution Models for Top-of-Atmosphere Radiative Flux Estimation from the Clouds and the Earth’s Radiant Energy System Instrument on the Terra Satellite. Part II: Validation

NASA Earth Observatory Article: Aqua CERES First Light: Image of the Day - The Clouds and the Earth's Radiant Energy System (CERES) instrument is one of six on board the Aqua satellite.

NASA Earth Observatory Article: CERES Detects Earth's Heat and Energy: Image of the Day - Clouds and the Earth's Radiant Energy System (CERES) monitors solar energy reflected from the Earth and heat energy emitted from the Earth.

NASA Earth Observatory Article: CERES First Light Images: Image of the Day - These two Terra instruments join a previous CERES scanner on the Tropical Rainfall Measuring Mission (TRMM) which was launched on November 27, 1997

NASA Earth Observatory Article: CERES Global Cloud Fraction - Each map combines observations from the CERES sensors on NASA's Terra and Aqua satellites collected on December 27, 2008

NASA Earth Observatory Article: Does the Earth Have an Iris Analog - Sensors on the TRMM and Terra satellite missions routinely measure these cloud physical properties, which scientists will match in time and space with CERES.

NASA Earth Observatory Article: First Monthly CERES Global Longwave and Shortwave Radiation - These measurements were acquired by NASA's Clouds and the Earth's Radiant Energy System (CERES) sensors during March 2000.

NASA Earth Observatory Article: Net Radiation - The measurements were made by the Clouds and the Earth's Radiant Energy System (CERES) sensors on NASA's Terra and Aqua satellites.

NASA Earth Observatory Article: Space-based Observations of the Earth (Thermal radiation emitted from the Earth's surface and clouds on March 1, 2000 as seen by the Clouds and Earth's Radiant Energy System (CERES))

NASA Earth Observatory Article: Terra Spacecraft Fact Sheet - Clouds and the Earth's Radiant Energy System (CERES) CERES will measure the Earth's energy balance—comparing the amount of energy from the sun that...

NASA Earth Observatory Article: The Arctic Is Absorbing More Sunlight - The radiation measurements were made by NASA's Clouds and the Earth's Radiant Energy System (CERES) instruments which fly on multiple satellites.

NASA Earth Observatory Article: The Water Cycle - MODIS, CERES, and AIRS all collect data relevant to the study of clouds.

READ-ME

REQUIREMENTS AND DESIGN

CERES Input Data Sources

SCIENCE DATA PRODUCT SOFTWARE DOCUMENTATION

Read Software Package - SYN1deg - Direct File Download (.zip)

USER'S GUIDE

CERES Data Management System View HDF User's Guide - Version 5.0, November 2007

From GCMD Science Keywords:

CLOUD LIQUID WATER/ICE > CLOUD MICROPHYSICS
SKIN TEMPERATURE > SURFACE TEMPERATURE
CLOUD MIDLAYER TEMPERATURE > CLOUD PROPERTIES
CLOUD TOP TEMPERATURE > CLOUD PROPERTIES
CLOUD BASE TEMPERATURE > CLOUD PROPERTIES
INCOMING SOLAR RADIATION
CLOUD BASE PRESSURE > CLOUD PROPERTIES
CLOUD HEIGHT > CLOUD PROPERTIES
SOLAR IRRADIANCE
SHORTWAVE RADIATION
OUTGOING LONGWAVE RADIATION
PHOTOSYNTHETICALLY ACTIVE RADIATION
SURFACE PRESSURE
ULTRAVIOLET RADIATION
RADIATIVE FLUX
NET RADIATION
LONGWAVE RADIATION
ATMOSPHERIC EMITTED RADIATION
CLOUD TOP PRESSURE > CLOUD PROPERTIES
CLOUD EMISSIVITY > CLOUD RADIATIVE TRANSFER
TOTAL PRECIPITABLE WATER > WATER VAPOR INDICATORS
CLOUD FRACTION > CLOUD PROPERTIES
AEROSOL OPTICAL DEPTH/THICKNESS
CLOUD DROPLET CONCENTRATION/SIZE > CLOUD MICROPHYSICS
ALBEDO
CLOUD TOP HEIGHT > CLOUD PROPERTIES
CLOUD OPTICAL DEPTH/THICKNESS > CLOUD MICROPHYSICS

Data Distribution

File Format(s):

HDF4

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Spatial Information

Spatial Coverage: (-90, 90), (-180, 180)
Spatial Coverage Type: Not provided
Coordinate System: Cartesian
Granule Spatial Representation: Cartesian

Locations

GLOBAL

Temporal Information

Temporal Coverage: 2022-04-01 - Present

Platforms

Earth Observation Satellites

NOAA-20

Joint Polar Satellite System - 1

CERES-FM6

Clouds and the Earth's Radiant Energy System - Flight Model 6

Total Detector Shortwave Detector Longwave Detector

CERES SCANNER

Clouds and the Earth's Radiant Energy System Scanner

VIIRS

Visible-Infrared Imager-Radiometer Suite

Terra

Earth Observing System, Terra (AM-1)

CERES-FM1

Clouds and the Earth's Radiant Energy System - Flight Model 1

Total Detector Shortwave Detector Window Detector

CERES-FM2

Clouds and the Earth's Radiant Energy System - Flight Model 2

Total Detector Shortwave Detector Window Detector

CERES SCANNER

Clouds and the Earth's Radiant Energy System Scanner

MODIS

Moderate-Resolution Imaging Spectroradiometer

GEOSTATIONARY SATELLITES

IMAGING RADIOMETERS

Metadata Dates

Created on 2022-12-22

Last updated on 2023-03-22

CERES Level 3

Entry Title: CERES and GEO-Enhanced TOA, Within-Atmosphere and Surface Fluxes, Clouds and Aerosols Monthly-Averaged 1-Hourly Terra-NOAA20 Edition4A

Entry ID: CER_SYN1deg-MHour_Terra-NOAA20_Edition4A

Aerosols Clouds Radiation Budget

DOI

Resources and Documentation

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VIEW RELATED INFORMATION

Keywords

From GCMD Science Keywords:

Data Distribution

File Format(s):

Spatial Information

Locations

Temporal Information

Platforms

Earth Observation Satellites

Joint Polar Satellite System - 1

CERES-FM6

Clouds and the Earth's Radiant Energy System - Flight Model 6

CERES SCANNER

Clouds and the Earth's Radiant Energy System Scanner

VIIRS

Visible-Infrared Imager-Radiometer Suite

Earth Observing System, Terra (AM-1)

CERES-FM1

Clouds and the Earth's Radiant Energy System - Flight Model 1

CERES-FM2

Clouds and the Earth's Radiant Energy System - Flight Model 2

CERES SCANNER

Clouds and the Earth's Radiant Energy System Scanner

MODIS

Moderate-Resolution Imaging Spectroradiometer

IMAGING RADIOMETERS

IMAGING RADIOMETERS

Metadata Dates