ASTER On-Demand L2 Polar Surface and Cloud Classification

Federal Geographic Data Committee (FGDC) Metadata:


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 2006, 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/sites/default/files/publications/2006ReferenceHandbook.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 TYPES
Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > SEA ICE > ICE EDGES
Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > SEA ICE > ICE EXTENT
Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > CLOUDS > CLOUD PROPERTIES > CLOUD FREQUENCY
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
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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
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Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 30m
Longitude_Resolution: 30m
Geographic_Coordinate_Units: Decimal degrees
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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
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Metadata_Reference_Information:
Metadata_Date: 20020805
Metadata_Review_Date: 20130826
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
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