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CERES SRBAVG Product Information

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SRBAVG Documentation

  • Data Quality Summary link to external site — Highlights the accuracy of this product as determined by the CERES Science Team.

SRBAVG Product Features

  • The SRBAVG product contains monthly and monthly hourly regional, zonal, and global averages of the TOA and surface LW and SW fluxes and the observed cloud conditions for each 1-degree equal-angle region.
  • This product differs from the AVG product in three ways:
    • The surface fluxes have been calculated from the TOA fluxes using parameterizations provided by the science team, instead of using the models provided by the SARB Subsystem.
    • No flux fields are calculated at levels between TOA and the surface.
    • The regional TOA fluxes are calculated using two methods.
  • There is one produced for each spacecraft and one for each combination of spacecraft.
  • This product is written in HDF and contains metadata as well as gridded science data.
  • SRBAVG is composed of the following structures contained in three separate files (SRBAVG1, SRBAVG2, SRBAVG3) on a Regional, Zonal, and Global Basis:
    • Regional parameters (SRBAVG1).
    • Total-sky radiative fluxes at TOA and surface (SRBAVG1).
    • Clear-sky radiative fluxes at TOA and surface (SRBAVG1).
    • Surface data (SRBAVG1).
    • CERES and GEO Layer-averaged cloud properties (SRBAVG2).
    • CERES Layer-averaged cloud properties (SRBAVG3).
  • Input to the SRBAVG Subsystem is the Single Scanner Footprint TOA/Surface Fluxes (SSF) Level2 archival product.
  • Applicable Studies:
    • Angular dependent of radiance.
    • Cloud and aerosol properties comparison.
    • Cloud and aerosol radiative forcing estimate or comparison with other estimate.
    • Comparison of radiation, aerosol and cloud properties with model other then GCM (ie. LES, CRM).
    • Comparison with GCMs.
    • Instrument study.
    • Interpretation of radiation cloud and aerosol property variability.
    • Surface flux calculation with simple transfer model.
    • TOA flux only comparison.

SRBAVG Processing Flowchart

Image: SRBAVG Processing Flowchart

SRBAVG Product Parameters

TOA Fluxes
Surface Fluxes
Cloud Properties
[Diurnally Complete]
Auxiliary Data
  • Shortwave Flux
  • Longwave Flux
  • Window-region Flux (8-12µm)
  • Net Flux
  • Albedo
  • Shortwave Flux - Down
  • Longwave Flux - Down
  • Window-region Flux - Down
  • Net Shortwave Flux
  • Net Longwave Flux
  • LW Surface Emissivity
  • WN Surface Emissivity
  • Cloud Area Fraction
  • Cloud Effective Pressure
  • Cloud Effective Temperature
  • Cloud Effective Height
  • Cloud Top Pressure
  • Cloud Base Pressure
  • Cloud Particle Phase
  • Liquid Water Path
  • Ice Water Path
  • Water Particle Radius
  • Ice Particle Effective Diameter
  • Cloud Visible Optical Depth
  • Surface Type Percent Coverage
  • Snow/Ice Percent Coverage
  • Precipitable Water

SRBAVG Spatial and Temporal Resolutions


Spatial Resolutions


Regional grid
(1°x1° latitude by longitude)
Zonal grid
(1° latitude)
Monthly SRBAVG
Monthly Hourly SRBAVG

SRBAVG Product Availability

SRBAVG Product Processing Status ( by year / by month / by product edition)
Product Sat
Level 3
2000 2001 2002 2003 2004 2005
Level 3
Mar  Terra SRBAVG /2000 Available   Terra SRBAVG /2001 Available   Terra SRBAVG /2002 Available   Terra SRBAVG /2003 Available   Terra SRBAVG /2004 Available Oct Terra SRBAVG /2005 Available
 Aqua SRBAVG /2000 Not Available  Aqua SRBAVG /2001 Not Available Jul  Aqua SRBAVG /2002 Available   Aqua SRBAVG /2003 Available   Aqua SRBAVG /2004 Available Oct Aqua SRBAVG /2005 Available

 Terra Available  Aqua Available  S-NPP Available  Combined Available
 Not Available (odd rows)  Not Available (even rows)

  • By clicking on "by month", a more detailed table will be rendered with the ability to click on specific months for daily and hourly Level 2 and Level 1B products.
  • By clicking on "by product edition", a more detailed table will be rendered with the versions of the product available.

CERES Instrument Temporal Coverage
Spacecraft Instrument(s) Launch Date Start Date End Date
TRMM PFM 11/27/1997 12/27/1997 05/29/2001
Terra FM1 & FM2 12/18/1999 02/25/2000 Still in operation
Aqua FM3 & FM4 05/04/2002 06/19/2002 Still in operation
S-NPP FM5 10/28/2011 01/27/2012 Still in operation

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  Image: NASA Logo NASA Official: Dr. Norman Loeb
Page Curator: Edward Kizer
Page Last Modified: 08/02/2017 09:55:21 EST
Site Last Modified: 08/18/2017 15:19:32 EST