GPM TMI on TRMM Common Calibrated Brightness Temperatures L1C 1.5 hours 13 km V05 (GPM_1CTRMMTMI) at GES DISC
This a new (GPM-formated) TRMM product. There is no equivalent in the old TRMM suite of products. All 1C products have a common L1C data structure, simple and generic. Each L1C swath includes scan time, latitude and longitude, scan status, quality, incidence angle, Sun glint angle, and the intercalibrated brightness temperature (Tc). One or more swaths are included in a product. The radiometer data are recalibrated to a common basis so that precipitation products derived from them are consistent. 1CSSMIS contains common calibrated brightness temperature from the SSMIS passive microwave instruments flown on the DMSP satellites. Swath S1 has 3 low frequency channels (19V 19H 22V). Swath S2 has 2 low frequency channels (37V 37H). Swath S3 has 4 high frequency channels (150H 183+/-1H 183+/-3H 183+/-7H). S4 has 2 high frequency channels (91V 91H). All the above frequencies are in GHz. Earth observations for all four swaths are taken during a 144o segment of the instrument rotation when SSMIS scans in the direction of foreward satellite motion. We define the spacecraft vector (v) at the center of this segment.
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| Spatial Extent: | Bounding Rectangle: N: 39.0 S: -39.0 E: 180.0 W: -180.0 |
Data Format(s): | Distribution: HDF5 |
| Temporal Extent: | Platform(s): | TRMM | |
| Data Center(s): | NASA/GSFC/SED/ESD/GCDC/GESDISC | Instrument(s): | TMI |
| Version: | 05 | ||
- Title: GPM TMI on TRMM Common Calibrated Brightness Temperatures L1C 1.5 hours 13 km V05
- Version: 05
- Creator: GPM Science Team
- Publisher: Goddard Earth Sciences Data and Information Services Center (GES DISC)
- Release Date: 2017-10-02T00:00:00.000Z
- Linkage: https://disc.gsfc.nasa.gov/datacollection/GPM_1CTRMMTMI_05.html
- READ-ME: https://docserver.gesdisc.eosdis.nasa.gov/public/project/GPM/README.TRMM.pdf, README Document
- GENERAL DOCUMENTATION: ftp://gpmweb2.pps.eosdis.nasa.gov/pub/GPMfilespec/filespec.GPM.pdf, FILE SPECIFICATION DOCUMENT
- ALGORITHM THEORETICAL BASIS DOCUMENT (ATBD): https://pps.gsfc.nasa.gov/atbd.html
Collection Information
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DOI
10.5067/GPM/TMI/TRMM/1C/05
- Search for granules from this collection
Data Identification
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Processing Level
1
- Quality The L1C products contain brightness temperatures that have been intercalibrated to a common basis and are no longer the original instrument brightness temperatures. Channels not relevant to precipitation retrievals are not included. The recalibration for most radiometers is a simple 2-point, linear adjustment. For the water vapor sounding channels, this is a simple offset. In the case of AMSR2, the adjustments are piecewise linear with more than two points to approximate the non-linear nature of the calibration of that instrument. The goal is to make the brightness temperatures consistent to 0.1K. That is not to say the calibration is accurate to this level; there are no suitable standards to assure absolute accuracy. The 0.1K level of consistency has been achieved in most cases, but in the case of the channels near 90 GHz, the uncertainty is somewhat greater. Also, some radiometers are not stable enough to permit this level of consistency.
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Collection Progress
Complete
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Use Constraints
The data in the 1AGMI file are not calibrated at all. Do not use these data unless they can be correctly calibrated and interpreted.
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Access Constraints
None
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Title: Intercalibration of Microwave Radiometer Brightness Temperatures for the Global Precipitation Measurement Mission
Publication Date: 2013-01-01
Author(s): Biswas, S. K., S. Farrar, K. Gopalan, A. Santos-Garcia, W. L. Jones, and S. Bilanow
Series: IEEE, Trans. on Geoscience and Remote Sensing
Volume: 51
Pages: 1465-1477
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Title: Toward an Intercalibrated Fundamental Climate Data Record of the SSM/I Sensors
Publication Date: 2013-01-01
Author(s): M. R. P. Sapiano, Berg, W. K., McKague, D. S., and Kummerow, C. D
Series: IEEE, Trans. on Geoscience and Remote Sensing
Volume: 51
Pages: 1492-1503
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Title: Comparing Calibrations of Similar Conically Scanning Window-Channel Microwave Radiometers
Publication Date: 2013-01-01
Author(s): T. T. Wilheit
Series: IEEE, Trans. on Geoscience and Remote Sensing
Volume: 51
Pages: 1453-1464
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Title: TRMM Version 8 Reprocessing Improvements and Incorporation into the GPM Data Suite
Publication Date: 2018-01-01
Author(s): Stoker, E., F. Alquaied, S. Bilanow, Y. Ji, and L. Jones
Series: Journal of Atmospheric and Oceanic Technology
Volume: 35
Pages: 1457-1470
Data Dates
| Creation | |
| Last Revision |
Publication References
Related URLs
Other Descriptive Keywords
Ancillary Keywords
- Atmosphere, Precipitation, Water Vapor
ISO Topic Categories
- CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
Acquisition Information
Projects
| Project Short Name | Campaigns | Project Dates |
|---|---|---|
| TRMM | No campaigns listed. | No dates provided. |
Temporal Information
Spatial Information
Spatial Information
Location Keywords
- GEOGRAPHIC REGION
- TROPICS
Data Centers
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NASA/GSFC/SED/ESD/GCDC/GESDISC
ARCHIVERGoddard Earth Sciences Data and Information Services Center (formerly Goddard DAAC), Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA
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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GEORGE HUFFMAN
InvestigatorGEORGE HUFFMAN
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NASA Goddard Space Flight Center
Mailstop 612
Greenbelt, MD 20771
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ANDREY SAVTCHENKO
Metadata AuthorANDREY SAVTCHENKO
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Distributed Active Archive Center Global Change Data Center
Code 610.2
NASA Goddard Space Flight Center
Greenbelt, MD 20771
301-614-5705
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GES DISC HELP DESK SUPPORT GROUP
Data Center ContactGES DISC HELP DESK SUPPORT GROUP
NASA/GSFC/SED/ESD/GCDC/GESDISC-
Goddard Earth Sciences Data and Information Services Center
Code 610.2
NASA Goddard Space Flight Center
Greenbelt, MD 20771
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Archive And Distribution Information
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Format: HDF5
Format Type: Native
Media: Online Archive
Average File Size: 15 MB
Fees: None