ASDC | FLASH_SSF_NOAA20-FM6-VIIRS

CERES Level 2

Entry Title: Fast Longwave And SHortwave Fluxes (FLASHflux) Clouds and Radiative Swath (SSF) data in netCDF

Entry ID: FLASH_SSF_NOAA20-FM6-VIIRS_Version1A

Clouds Radiation Budget

Description

FLASH_SSF_NOAA20-FM6-VIIRS_Version1A data are near real-time CERES observed TOA fluxes, clouds, and parameterized surface fluxes, not officially calibrated. The Fast Longwave and SHortwave Flux (FLASHFlux) data are a product line of the Clouds and the Earth's Radiant Energy Systems (CERES) project designed for processing and release of top-of-atmosphere (TOA) and surface radiative fluxes within one week of CERES instrument measurement. The FLASHFlux data product is a rapid-release product based on the algorithms developed for and data collected by the CERES project. CERES is currently producing world-class climate data products derived from measurements taken aboard NASA's Terra and Aqua spacecraft. While of exceptional fidelity, these data products require considerable processing time to assure quality, verify accuracy, and assess precision. The result is that CERES data are typically released up to six months after acquiring the initial measurements. Such delays are of little consequence for climate studies, especially considering the improved quality of the released data products. Thus, FLASHFlux products are not intended to achieve climate quality.

FLASHFlux data products were envisioned as a resource whereby CERES data could be provided to the community within a week of the initial measurements, with some calibration accuracy requirements relaxed to gain speed. The Single Scanner Footprint TOA/Surface Fluxes and Clouds (SSF) product contains one hour of instantaneous Fast Longwave And SHortwave Fluxes (FLASHFlux) data for a single Clouds and the Earth's Radiant Energy Systems (CERES) scanner instrument. The SSF combines instantaneous CERES data with scene information from a higher-resolution imager such as the Visible Infrared Imaging Radiometer Suite (VIIRS) on the NOAA-20 satellite and meteorological and ozone information from The Goddard Earth Observing System GEOS-5 FP-IT Atmospheric Data Assimilation System (GEOS-5 ADAS). Scene identification and cloud properties are defined at the higher imager resolution, and these data are averaged over the larger CERES footprint. For each CERES footprint, the SSF contains Top-of-Atmosphere fluxes in SW, LW, and incoming NET, surface fluxes using the Langley parameterized shortwave and longwave algorithms, and cloud information.

CERES is a key Earth Observing System (EOS) program component. The CERES instruments provide radiometric measurements of the Earth's atmosphere from three broadband channels. The CERES mission is a follow-up to the successful Earth Radiation Budget Experiment (ERBE) mission. The first CERES instrument (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 EOS flagship Terra on December 18, 1999. Two additional CERES instruments (FM3 and FM4) were launched on board EOS Aqua on May 4, 2002. CERES instrument Flight Model 5 (FM5) was launched on board the Suomi National Polar-orbiting Partnership (NPP) satellite on October 28, 2011. The latest CERES instrument (FM6) was launched on board NOAA-20 on November 18, 2017.

From GCMD Science Keywords:

CLOUD FRACTION > CLOUD PROPERTIES
CLOUD BASE PRESSURE > CLOUD PROPERTIES
CLOUD TOP PRESSURE > CLOUD PROPERTIES
SHORTWAVE RADIATION
RADIATIVE FLUX
OPTICAL DEPTH/THICKNESS
LONGWAVE RADIATION
EMISSIVITY
TOTAL PRECIPITABLE WATER > WATER VAPOR INDICATORS
OUTGOING LONGWAVE RADIATION
SKIN TEMPERATURE > SURFACE TEMPERATURE
NET RADIATION
CLOUD BASE HEIGHT > CLOUD PROPERTIES
CLOUD MIDLAYER TEMPERATURE > CLOUD PROPERTIES
CLOUD BASE TEMPERATURE > CLOUD PROPERTIES
HUMIDITY > WATER VAPOR INDICATORS

Along-Track
Cloud Base Pressure
Cloud Infrared Emissivity
Cloud Layer Area
Cloud Overlap
Cloud Particle Phase
Cloud Top Pressure
Ice Particle Diameter
Ice Water Path
Liquid Water Path
Longwave (LW) Flux
Longwave (LW) Unfiltered Radiance
OLR (Outgoing Longwave Radiation)
Shortwave (SW) Filtered Radiance
Shortwave (SW) Flux
Shortwave (SW) Unfiltered Radiance
Surface (Radiative) Flux
Surface Type
TOA (Top of Atmosphere) Flux
Total Filtered Radiance
Vertical Aspect Ratio
Visible Optical Depth
Water Particle Radius
Window (Wn) Region Flux
Window (WN) Unfiltered Radiance
Cloud Effective Pressure
Cloud Effective Temperature
Total-Sky Fluxes

Data Distribution

File Format(s):

NetCDF-4

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Spatial Information

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

Locations

GLOBAL

Temporal Information

Temporal Coverage: 2021-12-21 - 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 Longwave Detector Shortwave Detector

Metadata Dates

Created on 2022-11-30

Last updated on 2024-01-09