MODIS Ocean Products

Federal Geographic Data Committee (FGDC) Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Reference_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Unknown

Publication_Date: Unknown

Title: MODIS Ocean Products

Description:

Abstract:

The Moderate Resolution Imaging Spectroradiometer (MODIS) is the key instrument aboard the Terra (EOS AM) and Aqua (EOS PM) satellites. It is an optical scanner that views the Earth in 36 channels with spatial resolution ranging from 250 meters to 1 kilometer. MODIS-Aqua Level-2 and Level-3 Ocean Color and Sea Surface Temperature (SST) data products are processed and distributed by the Ocean Biology Processing Group (OBPG) at http://oceancolor.gsfc.nasa.gov/ Ocean color and SST processing details can be found at http://oceancolor.gsfc.nasa.gov/DOCS/MODISA_processing.html and at http://oceancolor.gsfc.nasa.gov/DOCS/modis_sst/ SST from MODIS-Terra are available from the Ocean Color Web data archive. For additional information about MODIS ocean data products, see http://oceancolor.gsfc.nasa.gov/ The MODIS-Aqua Level 1A files that are produced, utilized, and distributed by the Ocean Biology Processing Group (OBPG) are subsetted to remove bands and data that are not utilized for Ocean (SST and Ocean Color) product generation. The Level 1B data set contains calibrated and geolocated at-aperture radiances generated from Level 1A sensor counts and GEO files. Each Level-2 &granule& represents 5 minutes of Terra or Aqua viewing. The ocean color products are only collected in daylight, resulting in 144 granules per day. The sea surface temperature products are collected both day and night, resulting in 288 granules per day. Pixels have 1 km spatial resolution. There are 1354 pixels across the granule, and 2030 rows down the granule. Each Level-2 product is generated from the corresponding Level-1B product. Eleven ocean color parameters and three sea surface temperature parameters are produced. Each pixel also has up to 32 flags and masks that indicate the presence of non-ocean data, algorithm failures and warnings. At Level-3, the products can be generalized into three functional groups: binned 4.6 km, mapped 4.6 km, and mapped 9 km. Level-3 binned products are global products. Spatial bins have 4.63 km spatial resolution in a sinusoidal equal-area grid. Only bins with data values are present; land bins and bins with no data are not stored in the files. All 11 ocean color parameters and three sea surface temperature parameters are available in multiple temporal composites (Daily, Weekly, Monthly, Seasonal, Yearly, Cumulative). Each Level-3 binned Ocean Color granule contains only data that have met data quality standards as indicated by the Level-2 flags and masks. SST products can contain data of varying data quality levels, but each bin will only contain the best quality data available for the time period. The Level-3 standard mapped products are global products as well. Grid points for the entire globe are present in the data granules, including fill values for land and unfilled data points. Spatial resolutions of 4.6 and 9.2 km are available. Five ocean color parameters and three sea surface temperature parameters are available in multiple temporal composites (Daily, Weekly, Monthly, Seasonal, Yearly, Cumulative). Maps are in an equal-angle latitude-longitude grid (cylindrical equidistant map projection). Additional products are under evaluation (currently fluorescence line height and calcite concentration) and are also available as Level 3 mapped products. See the Algorithm Theoretical Basis Documents (ATBD) at http://modis.gsfc.nasa.gov/data/atbd/atbd_mod22.pdf and http://modis.gsfc.nasa.gov/data/atbd/atbd_mod23.pdf The following are the MODIS ocean parameters: Parameters 1-6 are normalized water leaving radiances at 412, 443, 488, 531, 551, and 667 nm. These are radiances received at spacecraft altitudes modified principally by solar irradiance scattering and absorption from the air (molecular (Rayleigh) scattering), from particles suspended in the air (aerosol (Mie) scattering), ozone (selective absorption), sea surface reflections (Sun and sky glitter), and finally, from within the ocean, water molecules and dissolved and suspended particles. Derived water-leaving radiances normalized to a constant sun angle, are essential information for the production of most other MODIS ocean products. The MODIS water-leaving radiance algorithm builds upon both CZCS and SeaWiFS algorithms, taking advantage of improvements in the instrument. For more details please see: http://oceancolor.gsfc.nasa.gov/DOCS/MSL12/ Parameter 7 is the chlorophyll-a concentration. The algorithm used is an empirical 3-band formulation (OC3M) developed by O'Reilly et al, based on the maximum ratio of either 443 nm or 488 nm to 551 nm surface reflectance. The coefficients in the formula are based on analysis of the NASA bio-Optical Marine Algorithm Data set (NOMAD) ( http://seabass.gsfc.nasa.gov/ ). For more details of the empirical chlorophyll algorithm please see: http://oceancolor.gsfc.nasa.gov/cgi/postlaunch_tech_memo.pl?11 Parameter 8 is the ocean water attenuation coefficient, or diffuse attenuation coefficient at 490 nm (K490). The summary for parameter 7 is relevant here, as well. Parameters 9-11 are ocean aerosol properties: aerosol optical thickness (AOT) at 869 nm (Tau 869), epsilon 748nm/869nm, and angstrom coefficient 531nm/869nm. AOT is a measure of atmospheric aerosol concentration and the effect that they have on the transmission of light. Epsilon is an index describing the two aerosol models selected by the atmospheric correction algorithm. The angstrom coefficient describes the spectral behavior and size distribution of the aerosol particles in the AOT. Sea-surface temperatures are produced as follows: Day using MODIS channels 31 and 32 (11 micron), Night using MODIS channels 31 and 32, and Night using MODIS channels 22 and 23 (4 micron). SST product determination is based on infrared retrievals of ocean temperature which are corrected for atmospheric absorption. Processing details can be found at http://oceancolor.gsfc.nasa.gov/DOCS/modis_sst/

Purpose:

Not Available

Supplemental_Information:

Not Available

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20000218

Ending_Date: Unknown

Currentness_Reference:Unknown

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20020704

Ending_Date: Unknown

Currentness_Reference:Unknown

Status:

Progress: In Work

Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Description_of_Geographic_Extent:

Bounding_Coordinates:

West_Bounding_Coordinate: -180.0

East_Bounding_Coordinate: 180.0

North_Bounding_Coordinate: 90.0

South_Bounding_Coordinate: -90.0

Keywords:

Theme:

Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS

Theme_Keyword_Thesaurus: GCMD PLATFORM

Theme_Keyword_Thesaurus: GCMD INSTRUMENT

Theme_Keyword_Thesaurus: PROJECT

Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY

Theme_Keyword_Thesaurus: DATA SET LANGUAGE

Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > AEROSOLS > AEROSOL BACKSCATTER > AEROSOL REFLECTANCE

Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > AEROSOLS > AEROSOL EXTINCTION

Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > AEROSOLS > AEROSOL OPTICAL DEPTH/THICKNESS > AEROSOL OPTICAL THICKNESS

Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > AEROSOLS > AEROSOL RADIANCE

Theme_Keyword: EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > BIOGEOCHEMICAL CYCLES

Theme_Keyword: EARTH SCIENCE > OCEANS > OCEAN OPTICS > ATTENUATION/TRANSMISSION

Theme_Keyword: EARTH SCIENCE > OCEANS > OCEAN OPTICS > EXTINCTION COEFFICIENTS > DIFFUSE ATTENUATION COEFFICIENT

Theme_Keyword: EARTH SCIENCE > OCEANS > OCEAN OPTICS > FLUORESCENCE

Theme_Keyword: EARTH SCIENCE > OCEANS > OCEAN OPTICS > OCEAN COLOR

Theme_Keyword: EARTH SCIENCE > OCEANS > OCEAN OPTICS > WATER-LEAVING RADIANCE > NORMALIZED WATER-LEAVING RADIANCE

Theme_Keyword: EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > SEA SURFACE TEMPERATURE

Theme_Keyword: EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES

Theme_Keyword: EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > PROTISTS > FLAGELLATES > HAPTOPHYTES > COCCOLITHOPHORES

Theme_Keyword: EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > PLANTS > MICROALGAE > HAPTOPHYTES > COCCOLITHOPHORES

Theme_Keyword: EARTH SCIENCE > BIOSPHERE > AQUATIC ECOSYSTEMS > PLANKTON > PHYTOPLANKTON

Theme_Keyword: EARTH SCIENCE > BIOSPHERE > AQUATIC ECOSYSTEMS > PLANKTON

Theme_Keyword: EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PIGMENTS > CHLOROPHYLL

Theme_Keyword: EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PIGMENTS > CHLOROPHYLL > CHLOROPHYLL-A

Theme_Keyword: EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > PRIMARY PRODUCTION

Theme_Keyword: TERRA > EARTH OBSERVING SYSTEM, TERRA (AM-1)

Theme_Keyword: AQUA > EARTH OBSERVING SYSTEM, AQUA

Theme_Keyword: MODIS > MODERATE-RESOLUTION IMAGING SPECTRORADIOMETER

Theme_Keyword: EOS > EARTH OBSERVING SYSTEM

Theme_Keyword: EOSDIS > EARTH OBSERVING SYSTEM DATA INFORMATION SYSTEM

Theme_Keyword: ESIP > EARTH SCIENCE INFORMATION PARTNERS PROGRAM

Theme_Keyword: BIOTA

Theme_Keyword: CLIMATOLOGY/METEOROLOGY/ATMOSPHERE

Theme_Keyword: GEOSCIENTIFIC INFORMATION

Theme_Keyword: OCEANS

Theme_Keyword: ENGLISH

Place:

Place_Keyword_Thesaurus: GCMD

Place_Keyword: OCEAN > ARCTIC OCEAN

Place_Keyword: OCEAN > ATLANTIC OCEAN

Place_Keyword: OCEAN > INDIAN OCEAN

Place_Keyword: OCEAN > SOUTHERN OCEAN

Place_Keyword: OCEAN > PACIFIC OCEAN

Place_Keyword: GEOGRAPHIC REGION > GLOBAL OCEAN

Place_Keyword: GEOGRAPHIC REGION > POLAR

Temporal:

Temporal_Keyword_Thesaurus: GCMD

Temporal_Keyword: Monthly Climatology

Temporal_Keyword: Monthly Climatology

Access_Constraints: None

Use_Constraints:

Publications of research results utilizing these data must acknowledge the Ocean Biology Processing Group (OBPG) at the NASA Goddard Space Flight Center, Greenbelt, MD, USA.

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

For data quality information on MODIS SST products performed by the Ocean Biology Processing Group (OBPG) see http://oceancolor.gsfc.nasa.gov/DOCS/modis_sst/

Logical_Consistency_Report:

Not Available

Completeness_Report:

Not Available

Lineage:

Process_Step:

Process_Description:

Not Available

Process_Date: Unknown

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 4 KM, 9 KM

Longitude_Resolution: 4 KM, 9 KM

Geographic_Coordinate_Units: Decimal degrees

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: NASA/GSFC/SED/ESD/GCDC/GESDISC > Goddard Earth Sciences Data and Information Services Center (formerly Goddard DAAC), Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA

Contact_Person: GES DISC HELP DESK SUPPORT GROUP

Contact_Position: DATA CENTER CONTACT

Contact_Address:

Address_Type: Mailing and Physical Address

Address: Goddard Earth Sciences Data and Information Services Center

Address: Code 610.2

Address: NASA Goddard Space Flight Center

City: Greenbelt

State_or_Province: MD

Postal_Code: 20771

Country: USA

Contact_Voice_Telephone: 301-614-5224

Contact_Facsimile_Telephone: 301-614-5268

Contact_Electronic_Mail_Address: gsfc-help-disc@lists.nasa.gov

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: NASA/GSFC/SED/ESD/GCDC/OBPG > Ocean Biology Processing Group (OBPG), Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA

Contact_Person: GENE CARL FELDMAN

Contact_Position: DATA CENTER CONTACT

Contact_Address:

Address_Type: Mailing and Physical Address

Address: Data System Manager

Address: NASA/Goddard Space Flight Center

Address: Mailstop 614.8

City: Greenbelt

State_or_Province: MD

Postal_Code: 20771

Country: USA

Contact_Voice_Telephone: (301) 286-9428

Contact_Facsimile_Telephone: (301) 286-0268

Contact_Electronic_Mail_Address: gene.c.feldman@nasa.gov

Resource_Description: MODIS_OCEAN_PARENT

Distribution_Liability:

Not Available

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: HDF

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://disc.gsfc.nasa.gov/

Access_Instructions:

DATA CENTER URL

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://oceancolor.gsfc.nasa.gov/

Access_Instructions:

DATA CENTER URL

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://oceancolor.gsfc.nasa.gov/cgi/browse.pl?sen=...

Access_Instructions:

Browse MODIS-Aqua Level 1 and Level 2 Data Products

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://oceancolor.gsfc.nasa.gov/cgi/l3?per=DAY

Access_Instructions:

Browse MODIS-Aqua Level 3 Data Products

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://science.oregonstate.edu/ocean.productivity/...

Access_Instructions:

Access ocean Net Primary Productivity data products derived from MODIS and/or SeaWiFS data available from Oregon State University.

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://reason.gsfc.nasa.gov/Giovanni/

Access_Instructions:

Access an easy-to-use, Web-based interface for the visualization and analysis of Earth Science data provided by the GES DISC DAAC.

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://gcmd.nasa.gov/getserf.htm?SeaDAS

Access_Instructions:

SeaWiFS Data Analysis System (SeaDAS) for processing, display, analysis, and quality control of ocean products.

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://oceancolor.gsfc.nasa.gov/DOCS/http://oceanc...

Access_Instructions:

OBPG Data and Processing documentation

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://oceancolor.gsfc.nasa.gov/

Access_Instructions:

Products descriptions, guide documents, suggested tools for MODIS data, sample data and images. MODIS FAQ, related links.

Fees: Not Available

Metadata_Reference_Information:

Metadata_Date: 20010611

Metadata_Review_Date: 20120727

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: MELANIE F. MEAUX

Contact_Position: DIF AUTHOR

Contact_Address:

Address_Type: Mailing and Physical Address

Contact_Electronic_Mail_Address: gsfc-gcmduso@mail.nasa.gov

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time