MODIS/Terra Cloud Mask and Spectral Test Results 5-Min L2 Swath 250m and 1km - NRT
The MODIS level-2 cloud mask product is a global product generated for both daytime and 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. The Terra MODIS Photovoltaic (PVLWIR) bands 27-30 are known to experience an electronic crosstalk contamination. The influence of the crosstalk has gradually increased over the mission lifetime, causing for example, earth surface features to become prominent in atmospheric band 27, increased detector striping, and long term drift in the radiometric bias of these bands. The drift has compromised the climate quality of C6 Terra MODIS L2 products that depend significantly on these bands, including cloud mask (MOD35), cloud fraction and cloud top properties (MOD06), and total precipitable water (MOD07). A linear crosstalk correction algorithm has been developed and tested by MCST.The electronic crosstalk correction was made to the calibration algorithm for bands 27-30 and implemented into C6.1 operational L1B processing. This implementation greatly improves the performance of the cloud mask. For more information on C6.1 changes visit: https://modis-atmos.gsfc.nasa.gov/documentation/collection-61 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. Link to the MODIS homepage for more data set information: https://modis-atmos.gsfc.nasa.gov/products/cloud-mask
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| Spatial Extent: | Bounding Rectangle: N: 90.0 S: -90.0 E: 180.0 W: -180.0 |
Data Format(s): | Distribution: HDF-EOS |
| Temporal Extent: | Platform(s): | TERRA | |
| Data Center(s): | NASA/GSFC/EOS/ESDIS/LANCEMODIS | Instrument(s): | MODIS |
| Version: | 6.1NRT | ||
- Title: MODIS/Terra Cloud Mask and Spectral Test Results 5-Min L2 Swath 250m and 1km
- Version: 6.1NRT
- Creator: LANCEMODIS
- Publisher: The Land, Atmosphere Near real-time Capability for EOS (LANCE)
- Release Date: 2017-10-20T00:00:00.000Z
- Linkage: http://modis-atmos.gsfc.nasa.gov/MOD35_L2/
Collection Information
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DOI
10.5067/MODIS/MOD35_L2.NRT.061
- Search for granules from this collection
Data Identification
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Processing Level
2
- Quality Overall NRT products match to operational with some expected minor differences from use of different ancillaries and ephemeris. There aren't any data gaps or data artifacts. Information on comparison of C6.1 Operational and NRT Atmospheric Products is posted at: http://lance.modaps.eosdis.nasa.gov/data_products/comparison.html. Information on comparison of C6 Operational and NRT Atmospheric and Land Products is posted at: http://lance3.modaps.eosdis.nasa.gov/data_products/comparison_atmos.html and http://lance3.modaps.eosdis.nasa.gov/data_products/comparison_land.html.
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Collection Progress
Active
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Use Constraints
None. See disclaimer: https://earthdata.nasa.gov/data/near-real-time-data/about-lance/disclaimer.
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Access Constraints
Users need to register with Earthdata to access data. Please visit the Earthdata Login at https://earthdata.nasa.gov/urs/register to register for a username and password.
Data Dates
| Creation |
Related URLs
Other Descriptive Keywords
Ancillary Keywords
- CIRRUS CLOUD
- CLEAR SKY PIXELS
- CLOUD COVERAGE
- CLOUD DETECTION
- CLOUD FRACTION
- CLOUD OBSTRUCTION
- CLOUD SCREENING
- CLOUD SHADOW
- CLOUD TYPES
- MOD35_L2
- MODIS CLOUD MASK
- SUN-GLINT
- EOSDIS
- Near Real Time (NRT)
- LANCE
- RELATIVE_START_DATE: -11
ISO Topic Categories
- CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
Additional Attributes
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Name:
ClearPct250m
FLOAT
Description:
None
Resolution Range Begin Range End Unit of Measure Accuracy 0.0 100.0 -
Name:
CloudCoverPct250m
FLOAT
Description:
None
Resolution Range Begin Range End Unit of Measure Accuracy 0.0 100.0 -
Name:
SuccessfulRetrievalPct
FLOAT
Description:
None
Resolution Range Begin Range End Unit of Measure Accuracy 0.0 100.0
Acquisition Information
Projects
| Project Short Name | Campaigns | Project Dates |
|---|---|---|
| EOS | No campaigns listed. | No dates provided. |
| EOSDIS | No campaigns listed. | No dates provided. |
| ESIP | No campaigns listed. | No dates provided. |
| TERRA | No campaigns listed. | No dates provided. |
Temporal Information
Spatial Information
| Coverage Type | Zone Identifier | Geometry | Granule Representation |
|---|---|---|---|
| HORIZONTAL | CARTESIAN | GEODETIC |
Resolution and Coordinate System
Horizontal Data Resolution
Location Keywords
- GEOGRAPHIC REGION
- GLOBAL
Data Centers
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NASA/GSFC/EOS/ESDIS/LANCEMODIS
ARCHIVERLand, Atmosphere Near real-time Capability for EOS (LANCE) Moderate Resolution Imaging Spectroradiometer (MODIS)
This data center does not have any addresses listed.
This data center does not have any contact mechanisms listed.
Data Contacts
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MODAPS USER SUPPORT TEAM
Technical ContactMODAPS USER SUPPORT TEAM
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MODAPS User Support Team
NASA/GSFC
Mail Code: 619
Greenbelt, MD 20771
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NEAL DEVINE
Technical ContactNEAL DEVINE
This contact does not have any addresses listed.
This contact does not have any contact mechanisms listed.
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GANG YE, PH.D
Technical ContactGANG YE, PH.D
This contact does not have any addresses listed.
This contact does not have any contact mechanisms listed.
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ASAD ULLAH
Metadata AuthorASAD ULLAH
This contact does not have any addresses listed.
This contact does not have any contact mechanisms listed.
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MODAPS USER SUPPORT TEAM
Data Center ContactMODAPS USER SUPPORT TEAM
NASA/GSFC/EOS/ESDIS/LANCEMODIS-
MODAPS User Support Team
NASA/GSFC
Mail Code: 619
Greenbelt, MD 20771
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Archive And Distribution Information
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Format: HDF-EOS
Format Type: Native
Media: Online (FTP)
Average File Size: 15 GB
Fees: No Fee