NOAA Climate Data Record (CDR) of SSM/I and SSMIS Microwave Brightness Temperatures, RSS Version 7

SSMI(S) Brightness Temperatures - RSS

browse graphicSSM/I Ascending 19 Vertical GHz Antenna Temperature
This Version 7 NOAA Fundamental Climate Data Record (CDR) from Remote Sensing Systems (RSS) contains brightness temperatures that have been inter-calibrated and homogenized over the observation time period. The temperature data are from the Special Sensor Microwave Imager (SSM/I) and Special Sensor Microwave Imager Sounder (SSMIS) series of passive microwave radiometers carried onboard the Defense Meteorological Satellite Program (DMSP) satellites. These satellite sensors measure the natural microwave emission coming from the Earth’s surface in the spectral band from 19 to 85 GHz. This dataset encompasses data from a total of seven satellites including the SSM/I sensors on board DMSP satellites F08, F10, F11, F13, F14, and F15 as well as the SSMIS sensors on board DMSP satellite F17. The data record covers the time period from July 1987 through the present with a one month latency. The spatial and temporal resolutions of the CDR files correspond to the original resolution of the source SSMI(S) observations. There are roughly 15 orbits per day with a swath width of approximately 1400 km resulting in nearly global daily coverage. The spatial resolution of the data is a function of the sensor/channel and varies from approximately 50 km for the lowest frequency channels to approximately 15km for the high-frequency channels. The output parameters include the observed brightness temperatures for each of the seven SSM/I channels and 24 SSMIS channels at the original sensor channel resolution along with latitude and longitude information, time, quality flags, and view angle information. The file format is netCDF-4 with added metadata that follow the Climate and Forecast (CF) Conventions and Attribute Convention for Dataset Discovery (ACDD). There are three major changes in the Version 7 processing: (1) the water vapor continuum absorption model was re-derived, (2) the clear-sky bias in cloud water was removed and the data format for cloud water was changed, and (3) the beamfilling correction in the rain algorithm was modified. Relative to Version 6, Version 7 has: (1) increased vapor values in the range of 50-60 mm by 1%, (2) increased vapor values above 60 mm by 2-3%, (3) cloud data changed to the range of cloud water values: -0.05 to 2.45 mm (cloud data format has changed), and (4) increased the global mean rain rates by about 16% (mostly due to changes in the extratropical values).
  • Cite as: Frank J. Wentz, Carl A. Mears, and NOAA CDR Program (2013): NOAA Climate Data Record (CDR) of SSM/I and SSMIS Microwave Brightness Temperatures, RSS Version 7. [indicate subset used]. NOAA National Centers for Environmental Information. doi:10.7289/V5SJ1HKZ [access date].
Download Data
Order Data
Distribution Formats
  • NetCDF (Version: 4)
Distributor Customer Engagement Branch
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
1-828-271-4800
ncei.orders@noaa.gov
Dataset Point of Contact NOAA Climate Data Record Program Office
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
+1 (828) 271-4800
rss_ssmi_contacts@noaa.gov
Time Period 1987-07-09 to Present
Spatial Bounding Box Coordinates
N: 90.0
S: -90.0
E: 180.0
W: -180.0
Spatial Coverage Map
General Documentation
Processing Documents
Associated Resources
Publication Dates
  • publication: 2013-08-22
Edition Version 7.0
Data Presentation Form Digital image
Dataset Progress Status Ongoing - data is continually being updated
Data Update Frequency Monthly
Purpose For the Remote Sensing Systems (RSS) Version-7 Special Sensor Microwave Imagers (SSM/I) FCDR, the six SSM/Is (aboard F08, F10, F11, F13, F14, and F15) have been carefully inter-calibrated which allow investigators to confidently use these SSM/I products for detailed inter-annual and decadal trend studies.
Use Limitations
  • For a complete description of use limitations for this CDR, see the Algorithm Theoretical Basis Document.
Dataset Citation
  • Cite as: Frank J. Wentz, Carl A. Mears, and NOAA CDR Program (2013): NOAA Climate Data Record (CDR) of SSM/I and SSMIS Microwave Brightness Temperatures, RSS Version 7. [indicate subset used]. NOAA National Centers for Environmental Information. doi:10.7289/V5SJ1HKZ [access date].
Cited Authors
  • Wentz, Frank J.
    RSS > Remote Sensing Systems
  • Mears, Carl A.
    RSS > Remote Sensing Systems
  • NOAA CDR Program
    DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Principal Investigators
  • Wentz, Frank J.
    RSS > Remote Sensing Systems
Collaborators
  • Mears, Carl A.
    RSS > Remote Sensing Systems
  • NOAA CDR Program
    DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Publishers
  • NOAA National Centers for Environmental Information
  • DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
Theme keywords Global Change Master Directory (GCMD) Science Keywords
  • Earth Science > Spectral/Engineering > Microwave > Antenna Temperature
  • Earth Science > Spectral/Engineering > Microwave > Brightness Temperature
Data Center keywords Global Change Master Directory (GCMD) Data Center Keywords
  • DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Platform keywords Global Change Master Directory (GCMD) Platform Keywords
  • DMSP 5D-2/F8 > Defense Meteorological Satellite Program-F8
  • DMSP 5D-2/F9 > Defense Meteorological Satellite Program-F9
  • DMSP 5D-2/F10 > Defense Meteorological Satellite Program-F10
  • DMSP 5D-2/F11 > Defense Meteorological Satellite Program-F11
  • DMSP 5D-2/F12 > Defense Meteorological Satellite Program-F12
  • DMSP 5D-2/F13 > Defense Meteorological Satellite Program-F13
  • DMSP 5D-2/F14 > Defense Meteorological Satellite Program-F14
  • DMSP 5D-2/F15 > Defense Meteorological Satellite Program-F15
  • DMSP 5D-2/F15 > Defense Meteorological Satellite Program-F17
Instrument keywords Global Change Master Directory (GCMD) Instrument Keywords
  • Earth Remote Sensing Instruments > Passive Remote Sensing > Spectrometers/Radiometers > Imaging Spectrometers/Radiometers > SSM/I > Special Sensor Microwave/Imager
  • Earth Remote Sensing Instruments > Passive Remote Sensing > Spectrometers/Radiometers > Imaging Spectrometers/Radiometers > SSMIS > Special Sensor Microwave Imager/Sounder
Place keywords Global Change Master Directory (GCMD) Location Keywords
  • Geographic Region > Global
Project keywords Global Change Master Directory (GCMD) Project Keywords
  • NOAA OneStop Project
  • SSMI(S) Brightness Temperature - RSS
Use Constraints
  • Cite as: Frank J. Wentz, Carl A. Mears, and NOAA CDR Program (2013): NOAA Climate Data Record (CDR) of SSM/I and SSMIS Microwave Brightness Temperatures, RSS Version 7. [indicate subset used]. NOAA National Centers for Environmental Information. doi:10.7289/V5SJ1HKZ [access date].
  • Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
Access Constraints
  • Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
Fees
  • In most cases, electronic downloads of the data are free, however fees may apply for data certifications, copies of analog materials, and data distribution on physical media.
Lineage information for: repository
Processing Steps
  • 2015-04-22T00:00:00 - NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
Last Modified: 2018-11-05
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