|
SeaWiFS Level 3 Global Standard Mapped Product Suite Entry ID: OBPG_SEAWIFS_L3_MAPPED |
||||||||
|
[
Get Data
]
[
Update this Record
]
|
Summary
|
Abstract:
This data set consists of satellite measurements of global ocean color, photosynthetically Active Radiation (PAR) and Normalized Difference Vegetation Index (NDVI) data obtained by the Sea-viewing Wide Field-of-view Sensor (SeaWiFS), in orbit on the OrbView-2 (formerly SeaStar) platform. SeaWiFS ocean color products are processed and distributed by the Ocean Biology Processing Group (OBPG). Processing details can be found at http://oceancolor.gsfc.nasa.gov/DOCS/SW_proc.html SeaWiFS acquires approximately 15 pole-to-pole orbital swaths of data per day, and approximately 90% of the ocean surface is scanned every two days. Visible and near infrared raw radiance counts are collected (Level 1A data) and are converted to geophysical parameters (Level 2 data). Level 3 (9 km) data processing involves both temporal and spatial binning and utilizes Level 2 Global Area Coverage (GAC) (4 km) data as input. The SeaWiFS Level 3 standard mapped image (SMI) products are integer representations of binned data products. This image is an 8-bit, two-dimensional array of an Equidistant Cylindrical projection of the globe. (The capability to produce 16-bit SMI products has been implemented by the OBPG, and the SeaWiFS Ocean Color products are expected to be regenerated as 16-bits values at the next reprocessing in about 1 year.) Each SMI product contains one image of a geophysical parameter and is stored in one physical HDF file. The Level 3 binned products are used to generate mapped data products on 9 km equi-rectangular projection (and 4 km for NDVI products). The products are generated for the following binning periods: Daily, 8-Day, Monthly, Monthly Climatology, Seasonal, Seasonal Climatology, Annual, Cumulative. Five SMI products are generated from each standard Ocean Color binned data product, one for each of the following geophysical parameters: -Chlorophyll-a concentration (CHLO) -Normalized water-leaving radiance at band 5 (L555) -Aerosol optical thickness at band 8 for atmospheric correction (T865) -Angstrom coefficient, 510-865 nm, for atmospheric correction (A510) -Diffuse attenuation coefficient at 490 nm (measure of optical clarity) (K490) Other SMI products: -SeaWiFS Level 3 PAR refers to false-colored images of Photosynthetically Active Radiation (PAR) from the sun 400-700 nm. For additional information about the PAR algorithm see http://oceancolor.gsfc.nasa.gov/DOCS/seawifs_par_wfigs.pdf -SeaWiFS NDVI refers to images of the Normalized Difference Vegetation Index - an indicator of chlorophyll distributions on land (NDVI) Each SMI product represents data binned over the period covered by the parent product. The arithmetic mean is used in each case to obtain the values for the SMI grid points from the binned data products. More detailed information on the Level-3 Standard Mapped Image data product format specifications can be found in the document at http://oceancolor.gsfc.nasa.gov/DOCS/Ocean_Level-3_SMI_Products.pdf Browse Level 3 Standard Mapped Images (SMI) at http://oceancolor.gsfc.nasa.gov/cgi/level3.pl The SeaWiFS Level 3 Mapped data files are available from the FTP site at ftp://oceans.gsfc.nasa.gov/SeaWiFS/Mapped/ |
Related URL
|
Link:
GET DATA
Description: Access SeaWiFS Level 3 Mapped Data Link: GET DATA Description: Browse Level 3 Standard Mapped Images Link: GET RELATED SERVICE METADATA (SERF) Description: SeaWiFS Data Analysis System (SeaDAS) for processing, display, analysis, and quality control of ocean products. Link: GET RELATED SERVICE METADATA (SERF) Description: Ocean Color Time-Series Online Visualization and Analysis System (Giovanni) Link: VIEW PROJECT HOME PAGE Description: SeaWIFS Project Link: VIEW RELATED INFORMATION Link: VIEW RELATED INFORMATION Description: Data and Processing documentation Link: VIEW RELATED INFORMATION Description: Ocean Color Forum |
This data set description is a member of a collection. Click to see members of this collection.
Geographic Coverage
| N: 90.0 | S: -90.0 | E: 180.0 | W: -180.0 |
|
Temporal Coverage
| Start Date: 1997-09-01 |
Location Keywords
|
OCEAN
> ARCTIC OCEAN
OCEAN > ATLANTIC OCEAN OCEAN > INDIAN OCEAN OCEAN > SOUTHERN OCEAN OCEAN > PACIFIC OCEAN GEOGRAPHIC REGION > GLOBAL GEOGRAPHIC REGION > GLOBAL OCEAN GEOGRAPHIC REGION > POLAR |
Data Resolution
|
Latitude Resolution:
4, 9 km
Longitude Resolution: 4, 9 km Temporal Resolution: Monthly Climatology |
Science Keywords
| ATMOSPHERE >AEROSOLS >AEROSOL BACKSCATTER >AEROSOL REFLECTANCE [Definition] |
| ATMOSPHERE >AEROSOLS >AEROSOL EXTINCTION [Definition] |
| ATMOSPHERE >AEROSOLS >AEROSOL OPTICAL DEPTH/THICKNESS >AEROSOL OPTICAL THICKNESS [Definition] |
| ATMOSPHERE >AEROSOLS >AEROSOL RADIANCE [Definition] |
| BIOSPHERE >VEGETATION >VEGETATION INDEX >NDVI [Definition] |
| OCEANS >OCEAN CHEMISTRY >PIGMENTS [Definition] |
| OCEANS >OCEAN OPTICS >ATTENUATION/TRANSMISSION [Definition] |
| OCEANS >OCEAN OPTICS >EXTINCTION COEFFICIENTS >DIFFUSE ATTENUATION COEFFICIENT [Definition] |
| OCEANS >OCEAN OPTICS >OCEAN COLOR [Definition] |
| OCEANS >OCEAN OPTICS >PHOTOSYNTHETICALLY ACTIVE RADIATION >PAR [Definition] |
| OCEANS >OCEAN OPTICS >WATER-LEAVING RADIANCE >NORMALIZED WATER-LEAVING RADIANCE [Definition] |
| OCEANS >OCEAN CHEMISTRY >PIGMENTS >CHLOROPHYLL [Definition] |
| OCEANS >OCEAN CHEMISTRY >PIGMENTS >CHLOROPHYLL >CHLOROPHYLL-A [Definition] |
ISO Topic Category
|
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
GEOSCIENTIFIC INFORMATION OCEANS |
Platform
| SEASTAR >Orbital Sciences Corporation OrbView-2 Satellite [Information] |
Instrument
| SEAWIFS >Sea-Viewing Wide Field-of-View Sensor [Information] |
Project
| EOS >Earth Observing System [Information] |
| EOSDIS >Earth Observing System Data Information System [Information] |
| ESIP >Earth Science Information Partners Program [Information] |
| SEAWIFS >Sea-viewing Wide Field-of-view Sensor [Information] |
Access Constraints
|
From the start of instrument operations through January 1, 1998, all SeaWiFS data is free and available to the public. Following January 1, 1998, SeaWiFS data for scientific research will ONLY be available to Authorized Users who have registered with the SeaWiFS Project. Any individual scientist who will be conducting research that employs SeaWiFS data must be a registered Authorized User. A single Authorized User cannot obtain data to be used anonymously by members of a research group; all of the members of the group must be Authorized Users. |
Use Constraints
|
Publications of research results utilizing these data must acknowledge the SeaWiFS Project and the Ocean Biology Processing Group (OBPG) at the NASA Goddard Space Flight Center, Greenbelt, MD, USA. |
Data Set Progress
| IN WORK |
Originating Center
| OBPG |
Data Center
|
Ocean Biology Processing Group (OBPG), Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA
[Information]
Data Center URL: http://oceancolor.gsfc.nasa.gov/
| |||
Distribution
|
Distribution_Media:
FTP
Distribution_Format: HDF |
Personnel
|
MELANIE
F.
MEAUX Role: DIF AUTHOR Email: gsfc-gcmduso at mail.nasa.gov |
|
GENE
CARL
FELDMAN Role: TECHNICAL CONTACT Phone: (301) 286-9428 Fax: (301) 286-0268 Email: gene.c.feldman at nasa.gov Contact Address: Data System Manager NASA/Goddard Space Flight Center Mailstop 614.8 City: Greenbelt Province or State: MD Postal Code: 20771 Country: USA |
|
DR. CHARLES
R.
MCCLAIN Role: INVESTIGATOR Phone: 301-286-5377 Fax: 301-286-0268 Email: Charles.R.McClain at nasa.gov Contact Address: NASA/Goddard Space Flight Center City: Greenbelt Province or State: MD Postal Code: 20771 Country: USA |
Creation and Review Dates
DIF Creation Date:
2005-10-25
Last DIF Revision Date:
2008-05-20
| [ Update this Record ] |
