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TRMM Microwave Imager (TMI) Level 1 Raw and Calibrated Radiance Products (TRMM Product 1A11) V7
Summary
- Type of release
- a one-off release of a single dataset
- Data Licence
- Not Applicable
- Content Licence
- Creative Commons CCZero
- Verification
- automatically awarded
- Release Date
- 8 October 2014
- Modified Date
- 8 July 2015
- Update Frequency
- irregular
- Publishers
- National Aeronautics and Space Administration
- Keywords
- earth-science, microwave, national-geospatial-data-asset, ngda, platform-characteristics, sensor-characteristics, spectral-engineering
- Identifier
- trmm-microwave-imager-tmi-level-1-raw-and-calibrated-radiance-products-trmm-product-1a11-v-73848
- Landing Page
- http://reverb.echo.nasa.gov/reverb?selected=C193423556-GSFCS4PA
- Maintainers
- PLEASE CONTACT GES DISC HELP DESK SUPPORT GROUP gsfc-help-disc@lists.nasa.gov
- Theme
- geospatial
- Language
- en-US
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Description
The Tropical Rainfall Measuring Mission (TRMM) is a joint U.S.-Japan satellite mission to monitor tropical and subtropical precipitation and to estimate its associated latent heating. TRMM was successfully launched on November 27, at 4:27 PM (EST) from the Tanegashima Space Center in Japan. The TRMM Microwave Imager (TMI) is a nine-channel passive microwave radiometer, which builds on the heritage of the Special Sensor Microwave/Imager (SSM/I) instrument flown aboard the Defense Meteorological Satellite Program (DMSP) platforms. Microwave radiation is emitted by the Earth's surface and by water droplets within clouds. However, when layers of large ice particles are present in upper cloud regions - a condition highly correlated with heavy rainfall - microwave radiation tends to scatter at frequencies above 19 GHz. The TMI detects radiation at five frequencies chosen to discriminate among these processes, thus revealing the likelihood of rainfall. The key to accurate retrieval of rainfall rates by this method is the deduction of cloud precipitation consistent with the radiation measurement at each frequency. The TMI frequencies are 10.65, 19.35, 37 and 85.5 GHz (dual polarization), and 21 GHz (vertical polarization only). The Level 1A product file (1A11) is a concatenation of the Level 0 data with a header record and, as such, is reversible to Level 0. The header record contains information pertaining to orbit times, orbit number, times of the first scan and number of scans, among other things. The Level 0 data contain the actual channel data expressed as "sensor counts." A file contains data for a single orbit with a file size of about 7 MB (uncompressed). There are 16 files of TMI 1A11 data produced per day. Spatial coverage is between 38 degrees North and 38 degrees South owing to the 35 degree inclination of the TRMM satellite. This orbit provides extensive coverage in the tropics and allows each location to be covered at a different local time each day, enabling the analysis of the diurnal cycle of precipitation. File Specifications for TRMM Products: ftp://pps.gsfc.nasa.gov/pub/v7filespec/filespec.TRMM.V7.pdf Metadata for TRMM Products: ftp://pps.gsfc.nasa.gov/pub/v7filespec/filespecMeta.TRMM.V7.pdf TRMM V6 vs. V7 Major Data Format Changes: http://pps.gsfc.nasa.gov/Documents/formatChangesV7.pdf
General Information
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This data is described at
http://catalog.data.gov/dataset/trmm-microwave-imager-tmi-level-1-raw-and-calibrated-radiance-products-trmm-product-1a11-v-73848 Do you think this data is incorrect? Let us know
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This data is published by
National Aeronautics and Space Administration Do you think this data is incorrect? Let us know
Legal Information
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The rights statement is at
http://catalog.data.gov/dataset/trmm-microwave-imager-tmi-level-1-raw-and-calibrated-radiance-products-trmm-product-1a11-v-73848 Do you think this data is incorrect? Let us know
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Outside the US, this data is available under
Creative Commons CCZero Do you think this data is incorrect? Let us know
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There are
yes, and the rights are all held by the same person or organisation Do you think this data is incorrect? Let us know
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The content is available under
Creative Commons CCZero Do you think this data is incorrect? Let us know
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The rights statement includes data about
its data licence Do you think this data is incorrect? Let us know
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This data contains
no data about individuals Do you think this data is incorrect? Let us know
Practical Information
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The data appears in this collection
http://catalog.data.gov/organization/nasa-gov Do you think this data is incorrect? Let us know
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The accuracy or relevance of this data will
go out of date but it is timestamped Do you think this data is incorrect? Let us know
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The data is
backed up offsite Do you think this data is incorrect? Let us know
Technical Information
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This data is published at
http://mirador.gsfc.nasa.gov/cgi-bin/mirador/presentNavigation.pl?tree=project&project=TRMM&dataGroup=Orbital&dataset=1A11%20(Version%20007):%20TMI%20Raw%20Data%20(TMI)&version=007 Do you think this data is incorrect? Let us know
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Find out how to contact someone about this data at
http://catalog.data.gov/dataset/trmm-microwave-imager-tmi-level-1-raw-and-calibrated-radiance-products-trmm-product-1a11-v-73848 Do you think this data is incorrect? Let us know
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Find out how to suggest improvements to publication at
http://www.data.gov/issue/?media_url=http://catalog.data.gov/dataset/trmm-microwave-imager-tmi-level-1-raw-and-calibrated-radiance-products-trmm-product-1a11-v-73848 Do you think this data is incorrect? Let us know