ASTER On-Demand L2 Polar Surface and Cloud Classification

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: Land Processes Distributed Active Archive Center (LP DAAC)

Publication_Date: 20011026

Title: ASTER On-Demand L2 Polar Surface and Cloud Classification

Edition:

Geospatial_Data_Presentation_Form:

Series_Information:

Series_Name:

Issue_Identification:

Publication_Information:

Publication_Place: Sioux Falls, South Dakota, USA

Publisher: U.S. Geological Survey

Other_Citation_Details:

Online_Linkage: https://lpdaac.usgs.gov

Description:

Abstract:

This product is discontinued. The ASTER On-Demand Level-2 Polar Surface and Cloud Classification product provides a classification map discriminating between different surface and cloud features over polar areas. The product aims to classify the cloud and snow-ice spectral signatures in both the visible and infrared wavelengths. The current algorithm works with data acquired during the daylight hours. This product will assist those studying greenhouse forcings in the polar regions where cloud cover exerts its effects on sea ice conditions, the regional ice-albedo feedbacks, the polar heat balance, and surface melting. This product will provide data used in cross-validating the MODIS cloud optical thickness and effective particle sizes, both of which impact the Earth's radiative budget. The ASTER On-Demand Level-2 Polar Surface and Cloud Classification product uses an hierarchical algorithm executed in four stages: In the first stage, the VNIR data are sub-sampled by half (15 m to 30 m) while the TIR data are sampled three times (90 m to 30 m). The SWIR data at 30 m are retained in their original resolution. The VNIR and SWIR digital numbers (DN) are normalized for solar irradiance, solar zenith angle, observation angle, and calibration coefficients. The TIR DNs are converted to temperature. In the second stage, the data are pre-classified to reduce the class ambiguity of a pixel's feature vector by using key features like coastline data, land-water mask etc. The third stage involves the use of a back-propagation neural network to aid in the resolution of feature vectors to one of nine possible classes. In the fourth stage, a spatial consistency test is performed on the classification mask and pixels deemed to be spatially inconsistent with their neighbors are re-classified. The final product is a coded pixel map containing the following thematic classes: [1] water [2] snow/ice [3] ice cloud [4] land [5] thin water cloud [6] water cloud over water [8] sea ice [12] water cloud over land [30] bare ground/tundra V002 data set release date: 2001-10-26 V003 data set release date: 2002-05-03 The key determinants between these versions are the use of a newer algorithm with an improved set of radiometric calibration and geometric correction coefficients databases in version 003. Data Set Characteristics: Area: ~60 km x 60 km Image Dimensions: 4200 rows x 4980 columns File Size: ~42 MB Units: Thematic Projection: Universal Transverse Mercator (UTM) Data Format: HDF-EOS Vgroup Data Fields: 1

Purpose:

Not Available

Supplemental_Information:

REFERENCE: Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) publication references: [available online at http://asterweb.jpl.nasa.gov/asterbiblio20120719.pdf] National Aeronautics and Space Administration, revised 2004, EOS Reference Handbook, a Guide to NASA's Earth Science Enterprise and the Earth Observing System: Greenbelt, Maryland, Goddard Space Flight Center, 261 p. [available online in pdf format at http://eospso.gsfc.nasa.gov/ftp_docs/data_products_1.pdf].

Status:

Progress: Complete

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: 83.0

South_Bounding_Coordinate: -83.0

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: ANCILLARY KEYWORDS

Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY

Theme_Keyword_Thesaurus: DATA SET LANGUAGE

Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > CLOUDS > CLOUD PROPERTIES > CLOUD FREQUENCY

Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > CLOUDS > CLOUD TYPES

Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > SEA ICE > ICE EDGES

Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > SEA ICE > ICE EXTENT

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

Theme_Keyword: ASTER > ADVANCED SPACEBORNE THERMAL EMISSION AND REFLECTION RADIOMETER

Theme_Keyword: EOSDIS > EARTH OBSERVING SYSTEM DATA INFORMATION SYSTEM

Theme_Keyword: ESIP > EARTH SCIENCE INFORMATION PARTNERS PROGRAM

Theme_Keyword: Lp Daac

Theme_Keyword: Eosdis

Theme_Keyword: Usgs/eros

Theme_Keyword: Esip

Theme_Keyword: Usgs

Theme_Keyword: Lpdaac

Theme_Keyword: CLIMATOLOGY/METEOROLOGY/ATMOSPHERE

Theme_Keyword: OCEANS

Theme_Keyword: ENGLISH

Place:

Place_Keyword_Thesaurus: GCMD

Place_Keyword: CONTINENT > ANTARCTICA

Place_Keyword: GEOGRAPHIC REGION > ARCTIC

Place_Keyword: GEOGRAPHIC REGION > POLAR

Access_Constraints: This product is discontinued.

Use_Constraints:

None.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: LP DAAC USER SERVICES

Contact_Position: TECHNICAL CONTACT

Contact_Address:

Address_Type: Mailing and Physical Address

Address: LP DAAC User Services

Address: U.S. Geological Survey (USGS)

Address: Earth Resources Observation and Science (EROS) Center

Address: 47914 252nd Street

City: Sioux Falls

State_or_Province: SD

Postal_Code: 57198-0001

Country: USA

Contact_Voice_Telephone: (Toll Free) (866) 573-3222

Contact_Voice_Telephone: (605) 594-6116

Contact_Facsimile_Telephone: (605) 594-6963

Contact_Electronic_Mail_Address: LPDAAC@usgs.gov

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Sensor anomalies may be present.

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: 30m

Longitude_Resolution: 30m

Geographic_Coordinate_Units: Decimal degrees

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: LP DAAC > Land Processes Distributed Active Archive Center

Contact_Person: LP DAAC USER SERVICES

Contact_Position: DATA CENTER CONTACT

Contact_Address:

Address_Type: Mailing and Physical Address

Address: LP DAAC User Services

Address: U.S. Geological Survey (USGS)

Address: Earth Resources Observation and Science (EROS) Center

Address: 47914 252nd Street

City: Sioux Falls

State_or_Province: SD

Postal_Code: 57198-0001

Country: USA

Contact_Voice_Telephone: (Toll Free) (866) 573-3222

Contact_Voice_Telephone: (605) 594-6116

Contact_Facsimile_Telephone: (605) 594-6963

Contact_Electronic_Mail_Address: LPDAAC@usgs.gov

Resource_Description: AST13POL

Distribution_Liability:

Not Available

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

https://lpdaac.usgs.gov/

Access_Instructions:

DATA CENTER URL

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://reverb.echo.nasa.gov/reverb

Access_Instructions:

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

https://lpdaac.usgs.gov

Access_Instructions:

The Land Processes Distributed Active Archive Center (LP DAAC) is one of several discipline-specific data centers within the NASA Earth Observing System Data and Information System (EOSDIS). The LP DAAC Web page provides information about available data products, services, documentation, order interfaces, and tools.

Fees: Not Available

Metadata_Reference_Information:

Metadata_Date: 20020805

Metadata_Review_Date: 20130131

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: GCMD User Support Office

Contact_Organization: NASA Global Change Master Directory

Contact_Address:

Address_Type: Mailing and Physical Address

Address: Not Available

City: Lanham

State_or_Province: MD

Postal_Code: 20706

Country: USA

Contact_Voice_Telephone: Not Available

Contact_Electronic_Mail_Address: gcmduso@gcmd.gsfc.nasa.gov

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time