MODIS/Terra Cloud Mask and Spectral Test Results 5-Min L2 Swath 250m and 1km

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: Menzel, W. P

Publication_Date: Unknown

Title: MODIS/Terra Cloud Mask and Spectral Test Results 5-Min L2 Swath 250m and 1km

Edition: Collection 004 and 005

Geospatial_Data_Presentation_Form:

Series_Information:

Series_Name:

Issue_Identification:

Publication_Information:

Publication_Place:

Publisher:

Other_Citation_Details:

Online_Linkage: http://modis-atmos.gsfc.nasa.gov/MOD35_L2/

Description:

Abstract:

MODIS was launched aboard the Terra satellite on December 18, 1999 (10:30 am equator crossing time) as part of NASA's Earth Observing System (EOS) mission. MODIS with its 2330 km viewing swath width provides almost daily global coverage. It acquires data in 36 high spectral resolution bands between 0.415 to 14.235 micron with spatial resolutions of 250m(2 bands), 500m(5 bands), and 1000m (29 bands). MODIS sensor counts, calibrated radiances, geolocation products and all derived geophysical atmospheric and ocean products are archived at NASA Goddard DAAC and has been made available to public since April 2000. The MODIS level-2 cloud mask product is a global product generated for both daytime & nighttime conditions at 1-km spatial resolution (at nadir) and for daytime at 250-m resolution. The algorithm employs a series of visible and infrared threshold and consistency tests to specify confidence levels that an unobstructed view of the Earth's surface is observed. An indication of shadows affecting the scene is also provided. The 250-m cloud mask flags are based on the visible channel data only. Radiometrically accurate radiances are required, so holes in the cloud mask will appear wherever the input radiances are incomplete or of poor quality. The shortname for this Level-2 MODIS cloud mask product is MOD35_L2 and the principal investigator for this product is MODIS scientist Dr. Paul Menzel ( paulm@ssec.wisc.edu). MOD35_L2 product files are stored in Hierarchical Data Format (HDF-EOS). Each of the 9 gridded parameters is stored as a Scientific Data Set (SDS) within the HDF-EOS file. The Cloud Mask and Quality Assurance SDS's are stored at 1 kilometer pixel resolution. All other SDS's (those relating to time, geolocation, and viewing geometry) are stored at 5 kilometer pixel resolution. Each file is roughly 47.5 MB in size, and the total data volume is approximately 13.7 GB/day. MOD35_L2 Data Group & Parameters Spatial & Temporal Resolution: Latitude & Longitude Scan start time Solar and Sensor Viewing Geometry: Solar zenith & Solar azimuth angle Sensor zenith & Sensor azimuth angle Science Parameters Cloud Mask (1km) Cloud Mask (250 m) Quality Assurance Parameters: Quality Assurance Flags (1km) Link to the MODIS homepage for more data set information: http://modis-atmos.gsfc.nasa.gov/MOD35_L2/

Purpose:

Not Available

Supplemental_Information:

REFERENCE: Ackerman,S. , K. Strabala, P. Menzel, R. Frey, C. Moeller, L. Gumley, B. Baum, C. Schaaf, and G. Riggs,1998: Discriminating Clear Sky from Clouds (Cloud Mask Retrieval Algorithm) Theoretical Basis Document. ATBD-MOD-06, NASA Goddard Space Flight Center, 32 pp. Ackerman, S. K. Strabala, P.Menzel, R. Frey, C. Moeller, and L. Gumley, 1998: Discriminating clear sky from clouds with MODIS. J. Geophys. Res., 103, 32141-32157 Chu,A., K. Strabala, S. Platnick, E. Moody,M. King, S. Mattoo, R. Hucek, and B. Ridgway, 2000: MODIS Atmosphere QA Plan. Version 2.2 ,NASA Goddard Space Flight Center, 46 pp. Gao, B.-C., W. Han, S.-C. Tsay, and N. F. Larsen, 1998: Cloud detection over arctic region using airborne imaging spectrometer data during the daytime,J. Appl. Meteorol., 37, 1421-1429. Gao, B.-C., and Y. J. Kaufman, 1995: Selection of the 1.375-?m MODIS channel for remote sensing of cirrus clouds and stratospheric aerosols from space, J. Atm. Sci., 52, 4231-4237. Gao, B. -C, A. F. H. Goetz, and W. J. Wiscombe, 1993: Cirrus detection from Airborne Imaging Radiometer using 1.38 micron water vapor band. Geophys. Res. Letter, 4,301-304. King,M., Y. Kaufman, P. Menzel, D. Tanre, and B.Gao, 1999: MODIS Atmosphere Validation Plan, NASA Goddard Space Flight Center, 48 pp. King, M. D., W. P. Menzel, P. S. Grant, J. S. Myers, G. T. Arnold, S. E. Platnick, L. E.Gumley, S. C. Tsay, C. C. Moeller, M. Fitzgerald, K. S. Brown and F. G.Osterwisch, 1996: Airborne scanning spectrometer for remote sensing of cloud, aerosol, water vapor and surface properties. J. Atmos. Oceanic Technol.,13, 777–794. King, M. D., Y. J. Kaufman, W. P. Menzel and D. Tanr?, 1992: Remote sensing of cloud, aerosol and water vapor properties from the Moderate Resolution Imaging Spectrometer (MODIS). IEEE Trans. Geosci. Remote Sens., 30, 2–27. Menzel, W. P.,and L. E. Gumley, 1997:MODIS Cloud Mask , in MTPE EOS Data Products Handbook, pp. 112-113. Rossow, W. B., and L.C. Gardner, 1993: Cloud detection using satellite measurements of infrared and visible radiances for ISCCP, J. Climate, 6, 2341-2369.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20010306

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: ANCILLARY KEYWORDS

Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY

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

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

Theme_Keyword: EARTH SCIENCE > ATMOSPHERE > CLOUDS

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

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: TERRA > EARTH OBSERVING SYSTEM (EOS), TERRA

Theme_Keyword: Cirrus Cloud

Theme_Keyword: Clear Sky Pixels

Theme_Keyword: Cloud Coverage

Theme_Keyword: Cloud Detection

Theme_Keyword: Cloud Fraction

Theme_Keyword: Cloud Obstruction

Theme_Keyword: Cloud Screening

Theme_Keyword: Cloud Shadow

Theme_Keyword: Cloud Types

Theme_Keyword: Mod35_l2

Theme_Keyword: Modis Cloud Mask

Theme_Keyword: Sun-glint

Theme_Keyword: Eosdis

Theme_Keyword: Near Real Time (nrt)

Theme_Keyword: Lance

Theme_Keyword: CLIMATOLOGY/METEOROLOGY/ATMOSPHERE

Place:

Place_Keyword_Thesaurus: GCMD

Place_Keyword: OCEAN > ARCTIC OCEAN

Place_Keyword: OCEAN > ATLANTIC OCEAN

Place_Keyword: OCEAN > INDIAN OCEAN

Place_Keyword: OCEAN > PACIFIC OCEAN

Place_Keyword: GEOGRAPHIC REGION > GLOBAL

Place_Keyword: GEOGRAPHIC REGION > GLOBAL OCEAN

Place_Keyword: GEOGRAPHIC REGION > POLAR

Temporal:

Temporal_Keyword_Thesaurus: GCMD

Temporal_Keyword: 5-minute

Temporal_Keyword: 1 Minute - < 1 Hour

Access_Constraints: Available to public to gain familiarity with the data format and parameters.

Use_Constraints:

This Data set (version 003/collection 003) is of 'Provisional' Quality. Even though, it is based on better calibration algorithm but is not fully validated yet. This data is still not appropriate for use in scientific publications. Before using it in any publication please contact science team representative for the known problems and updates.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: LAADS USER SUPPORT TEAM

Contact_Position: TECHNICAL CONTACT

Contact_Address:

Address_Type: Mailing and Physical Address

Address: LAADS User Support Team

Address: 4801 Forbes Boulevard

City: Lanham

State_or_Province: MD

Postal_Code: 20706

Country: USA

Contact_Voice_Telephone: 301-731-2917, 1-866-506-6347 (toll-free - US only)

Contact_Facsimile_Telephone: 301-577-6622

Contact_Electronic_Mail_Address: modapsuso@sigmaspace.com

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

The 'version 003' or 'collection 003' product is better than 'version 001' or 'beta' product. The quality of this version 003 product is established as 'Provisional' since it is based on better calibration algorithm but the product is not fully validated yet.

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: 250 m

Longitude_Resolution: 250 m

Geographic_Coordinate_Units: Decimal degrees

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: NASA/GSFC/SED/ESD/HBSL/BISB/LAADS > L1 and Atmosphere Archive and Distribution System,Biospheric Information Systems Branch, Hydrospheric and Biospheric Sciences Laboratory, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA

Contact_Person: LAADS USER SUPPORT TEAM

Contact_Position: DATA CENTER CONTACT

Contact_Address:

Address_Type: Mailing and Physical Address

Address: LAADS User Support Team

Address: 4801 Forbes Boulevard

City: Lanham

State_or_Province: MD

Postal_Code: 20706

Country: USA

Contact_Voice_Telephone: 301-731-2917, 1-866-506-6347 (toll-free - US only)

Contact_Facsimile_Telephone: 301-577-6622

Contact_Electronic_Mail_Address: modapsuso@sigmaspace.com

Resource_Description: MOD35_L2 Collection 004 and 005

Distribution_Liability:

Not Available

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: HDF

Transfer_Size: 15 GB

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://ladsweb.nascom.nasa.gov/

Access_Instructions:

DATA CENTER URL

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://ladsweb.nascom.nasa.gov/data/search.html

Access_Instructions:

Web site for MODIS Collection 5 L1B, Geo and atmosphere data ordering. Web site for MODIS Collection 4 atmosphere data ordering.

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

ftp://ladsftp.nascom.nasa.gov/allData/5/MOD35_L2/

Access_Instructions:

Access Collection 5 data set MOD35_L2 from the LAADS FTP server.

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

ftp://ladsftp.nascom.nasa.gov/allData/4/MOD35_L2/

Access_Instructions:

Access Collection 4 data set MOD35_L2 from the LAADS FTP server.

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://earthdata.nasa.gov/data/nrt-data/data-produ...

Access_Instructions:

Near real-time (NRT) data are available from MODAPS for certain Aqua and Terra MODIS L0, L1, L2, L2G, and L3 products. Whereas the standard MODIS forward processing acquires 2-hour L0 files for Aqua and Terra from EDOS within 7-8 hours of real time, LANCE-MODIS acquires session-based L0 files from EDOS and the end of the session is available within 10-30 minutes after real time.

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://modis-atmos.gsfc.nasa.gov/MOD35_L2/index.ht...

Access_Instructions:

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://modis.gsfc.nasa.gov/sci_team/

Access_Instructions:

MODIS Science Team

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://modis-atmos.gsfc.nasa.gov/

Access_Instructions:

MODIS Atmosphere Home Page

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://mcst.gsfc.nasa.gov/

Access_Instructions:

MODIS Characterization Support Team (MCST).

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

ftp://ladsftp.nascom.nasa.gov/README

Access_Instructions:

Readme regarding accessing MODIS data from the LAADS FTP server.

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://ladsweb.nascom.nasa.gov/data/availability.h...

Access_Instructions:

View MODIS data availability.

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

http://modis-atmos.gsfc.nasa.gov/MOD07_L2/sample.h...

Access_Instructions:

Sample and Browse Images for MODIS (MOD07_L2) Aerosol Products

Fees: None

Metadata_Reference_Information:

Metadata_Date: 20010621

Metadata_Review_Date: 20130610

Metadata_Future_Review_Date: 20010815

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: GANG YE, PH.D

Contact_Position: DIF AUTHOR

Contact_Address:

Address_Type: Mailing and Physical Address

Contact_Voice_Telephone: 301-352-2109

Contact_Electronic_Mail_Address: gang.ye@sigmaspace.com

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time