NESDIS Blended Total Precipitable Water (TPW) Products

Metadata Updated: October 12, 2020

The blended Total Precipitable Water (TPW) product is derived from multiple sensors/satellites. The Percentage of TPW normal (PCT), or TPW anomaly, shows the percentage departure of TPW from the NASA Water Vapor Project (NVAP) climatology (1988-1999). The blended products were merged from polar-orbiting and geostationary satellite sensors including legacy AMSU/MHS, SSMIS, GOES Sounders, as well as ATMS from S-NPP, NOAA-20, and GPS TPW. Individual biases of the data sources have been mitigated to produce a more meteorologically significant product. The blended methodology provides seamless global coverage without gaps to allow for the analysis of atmospheric moisture over land and ocean. The products are on a Mercator projection with 16 km resolution at the equator. The map is centered at the equator and 160 degrees W. It has 1437 lines and 2500 elements, which covers the earth from about 71 degrees N to 71 degrees S. The products are hourly in HDF-EOS and NetCDF file formats. Also, included are PNG images of the products generated per hour over the globe and 14 local regions. These operational products were produced by the NOAA/NESDIS Office of Satellite and Product Operations (OSPO). The TPW/PCT products have been operational since 2009, however, the archive period of record begins in 2013.

Access & Use Information

License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Date June 18, 2019
Metadata Created Date October 12, 2020
Metadata Updated Date October 12, 2020
Reference Date(s) September 30, 2009 (publication)
Frequency Of Update continual

Metadata Source

Harvested from ncdc

Graphic Preview

Global Blended TPW

Additional Metadata

Resource Type Dataset
Metadata Date June 18, 2019
Metadata Created Date October 12, 2020
Metadata Updated Date October 12, 2020
Reference Date(s) September 30, 2009 (publication)
Responsible Party DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce (Point of Contact)
Contact Email
Access Constraints Cite this dataset when used as a source., 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., 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.
Bbox East Long 180.0
Bbox North Lat 71.0
Bbox South Lat -71.0
Bbox West Long -180.0
Coupled Resource
Frequency Of Update continual
Graphic Preview Description Global Blended TPW
Graphic Preview File
Graphic Preview Type PNG
Guid gov.noaa.ncdc:C00803
Harvest Object Id 218b0393-6c0b-4268-9612-f3e35f876383
Harvest Source Id e3e3e1d2-c4a0-460f-9b01-d39db73f16bd
Harvest Source Title ncdc
Licence For a complete description of use limitations for this dataset, refer to the producer's documentation.
Metadata Language
Metadata Type geospatial
Progress onGoing
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True
Temporal Extent Begin 2013-10-01

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