NOAA Climate Data Record (CDR) of Advanced Very High Resolution Radiometer (AVHRR) and High-resolution Infra-Red Sounder (HIRS) Reflectance, Brightness Temperature, and Cloud Products from Pathfinder Atmospheres - Extended (PATMOS-x), Version 6.0

AVHRR+HIRS Reflectance - PATMOS-x CDR; AVHRR+HIRS Cloud Properties - PATMOS-x CDR

Top of atmosphere reflectance (%) at the nominal wavelength of 0.65 microns.

The Pathfinder Atmospheres - Extended (PATMOS-x) Version 6.0 suite of cloud products and calibrated radiometric data is a global Climate Data Record (CDR) derived from instruments onboard the NOAA POES and EUMETSAT MetOp satellite series. This Version 6.0 CDR integrates spectral information from the Advanced Very High Resolution Radiometer (AVHRR) as well as the High-resolution Infra-Red Sounder (HIRS), where the previous Version 5.3 CDR is derived from AVHRR only. The record spans from 1981 to present, and is generated from between two and ten satellite overpasses daily. The primary cloud products were derived from the Infrared (IR) Algorithm Working Group (AWG) cloud height algorithm (ACHA) and the daytime cloud optical and microphysical properties (DCOMP) algorithm. The calibrated radiometric data covering the visible spectrum includes 0.63, 0.86, and 1.6 micron reflectance from AVHRR. In the infrared this includes 3.75, 11, and 12 micron brightness temperatures from AVHRR, and 6.7 micron and 4 of the CO2 channel brightness temperatures from HIRS. The AVHRR sensor resolution is approximately 1.09 km near nadir, however, it has been aggregated to approximately 4 km within the Global Area Coverage (GAC) files used for processing. The native HIRS resolution is coarser, and it has been interpolated to the AVHRR pixel size and location using a data fusion algorithm. The data points have been fitted to a 0.1 x 0.1 degree equal-angle grid. The final files cover the CDR period of record up to the last achievable final processing date. The preliminary files are updated daily. The latency of the preliminary files is within seven days from real-time. Every one to two years, the final files are completed and replace the preliminary for the same time period. The product is in netCDF file format following the Climate and Forecast (CF) Conventions and the Attribute Convention for Dataset Discovery (ACDD). The CDR is accompanied by algorithm documentation, data flow diagram, and source code.

Dataset Citation

Cite as: Foster, Michael J.; Phillips, Coda; Heidinger, Andrew K.; and NOAA CDR Program (2021): NOAA Climate Data Record (CDR) of Advanced Very High Resolution Radiometer (AVHRR) and High-resolution Infra-Red Sounder (HIRS) Reflectance, Brightness Temperature, and Cloud Products from Pathfinder Atmospheres - Extended (PATMOS-x), Version 6.0. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.7289/V5X9287S [access date].

Dataset Identifiers

doi:10.7289/V5X9287S
NCEI DSI 3626_03
gov.noaa.ncdc:C00926

ISO 19115-2 Metadata

C00926

XML


Download Data	NCEI Direct Download (Dataset Files) (download) Direct download links for the dataset. AWS S3 Explorer (Region: us-east-1) (download) Browse view to explore the S3 bucket.
Distribution Formats	NetCDF (Version: 4)
Ordering Instructions	Contact NCEI for other distribution options and instructions.
Distributor	NOAA National Centers for Environmental Information ncei.info@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 avhrr_patmosx_contacts@noaa.gov


Coverage Description
Time Period	1981-08-25 to Present
Spatial Bounding Box Coordinates	N: 90.0 S: -90.0 E: 180.0 W: -180.0
Spatial Coverage Map


General Documentation	NCEI Dataset Landing Page Landing page for the dataset. NOAA Climate Data Records: AVHRR+HIRS Reflectance - PATMOS-x CDR Access to the published CDR product, documentation, and source code. NOAA Climate Data Records: AVHRR+HIRS Cloud Properties - PATMOS-x CDR Access to the published CDR product, documentation, and source code. NCEI Direct Download (Dataset Documentation) Direct download links for the documentation files. Registry of Open Data on AWS Information on AWS data access. Azure Landing Page (Region: us-east) Information on Microsoft Azure data access.
Processing Documents	PATMOS-x Source Code AVHRR+HIRS Reflectance CDR Source Code (download) This source code is for reference only. The source code is provided to maintain transparency of the algorithm and processes used in creating the Climate Data Record (CDR). The source code is not intended to be portable to any computer system(s) beyond that of the original CDR producer's environment. AVHRR+HIRS Cloud Properties CDR Source Code (download) This source code is for reference only. The source code is provided to maintain transparency of the algorithm and processes used in creating the Climate Data Record (CDR). The source code is not intended to be portable to any computer system(s) beyond that of the original CDR producer's environment. PATMOS-x Data Flow Diagram AVHRR+HIRS Reflectance CDR Data Flow Diagram Data processing flowchart for the CDR product. AVHRR+HIRS Cloud Properties CDR Data Flow Diagram Data processing flowchart for the CDR product. PATMOS-x Algorithm Description AVHRR+HIRS Reflectance CDR Algorithm Description Algorithm Description for the CDR product. AVHRR+HIRS Cloud Properties CDR Algorithm Description Algorithm Description for the CDR product.
Associated Resources	The Pathfinder Atmospheres-Extended AVHRR Climate Dataset Journal Article published June 2014 by the American Meteorological Society Heidinger, A.K., M.J. Foster, A. Walther, and X. Zhao, 2014: The Pathfinder Atmospheres-Extended AVHRR Climate Dataset. Bull. Amer. Meteor. Soc., 95, 909-922, https://doi.org/10.1175/BAMS-D-12-00246.1 Other publications that cite this dataset Google Scholar search results Search results for publications that cite this dataset by its DOI(s). NOAA Climate Data Record (CDR) of Reflectance and Brightness Temperatures from AVHRR Pathfinder Atmospheres - Extended (PATMOS-x), Version 5.3 (Superseded) NCEI landing page for the Version 5.3 CDR Related dataset landing page. NOAA Climate Data Record (CDR) of Cloud Properties from AVHRR Pathfinder Atmospheres - Extended (PATMOS-x), Version 5.3 (Superseded) NCEI landing page for the Version 5.3 CDR Related dataset landing page. University of Wisconsin-Madison Cooperative Institute for Meteorological Satellite Studies (CIMSS) PATMOS-x CIMSS PATMOS-x page Project page with dataset information.


Publication Dates	publication: 2021-08-04
Edition	Version 6.0
Data Presentation Form	Digital image
Dataset Progress Status	Ongoing - data is continually being updated
Data Update Frequency	Daily
Purpose	The AVHRR+HIRS data record offers a unique, long-term resource for multi-decadal climate studies. PATMOS-x improved the quality of the dataset by recalibrating and renavigating the data. The resulting CDR supports climate variability studies over the period of record.
Use Limitations	See the CDR page for the use agreement, technical notes, and other documentation describing the use limitations. The near real-time data is labeled as an Interim operational CDR (ICDR) or a "preliminary" CDR instead of a final CDR, indicating that it has not yet been fully vetted for climate applications. The near real-time ICDR/preliminary data will transition to final CDR status after the data have undergone further analysis and processing. The expected time lag of the final CDR transition is approximately one year. The state of a data file is indicated within each file name.


Dataset Citation	Cite as: Foster, Michael J.; Phillips, Coda; Heidinger, Andrew K.; and NOAA CDR Program (2021): NOAA Climate Data Record (CDR) of Advanced Very High Resolution Radiometer (AVHRR) and High-resolution Infra-Red Sounder (HIRS) Reflectance, Brightness Temperature, and Cloud Products from Pathfinder Atmospheres - Extended (PATMOS-x), Version 6.0. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.7289/V5X9287S [access date].
Cited Authors	Foster, Michael J. Phillips, Coda Heidinger, Andrew K. NOAA CDR Program
Principal Investigators	Foster, Michael J.
Collaborators	Phillips, Coda Heidinger, Andrew K. NOAA CDR Program
Publishers	NOAA National Centers for Environmental Information


Theme keywords	Global Change Master Directory (GCMD) Science Keywords Earth Science > Spectral/Engineering > Visible Wavelengths > Visible Radiance Earth Science > Spectral/Engineering > Infrared Wavelengths > Brightness Temperature Earth Science > Atmosphere > Clouds > Cloud Properties > Cloud Top Height Earth Science > Atmosphere > Clouds > Cloud Properties > Cloud Fraction Earth Science > Atmosphere > Clouds > Cloud Microphysics > Cloud Optical Depth/Thickness Earth Science > Atmosphere > Clouds > Cloud Radiative Transfer > Cloud Emissivity Earth Science > Atmosphere > Clouds > Cloud Properties > Cloud Top Pressure Earth Science > Atmosphere > Clouds > Cloud Properties > Cloud Top Temperature
Data Center keywords	Global Change Master Directory (GCMD) Data Center Keywords DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce UWI-MAD/SSEC > Space Science and Engineering Center, University of Wisconsin, Madison
Platform keywords	Global Change Master Directory (GCMD) Platform Keywords TIROS-N > Television Infrared Observation Satellite-N NOAA-6 > National Oceanic & Atmospheric Administration - 6 NOAA-7 > National Oceanic & Atmospheric Administration - 7 NOAA-8 > National Oceanic & Atmospheric Administration - 8 NOAA-9 > National Oceanic & Atmospheric Administration - 9 NOAA-10 > National Oceanic & Atmospheric Administration - 10 NOAA-11 > National Oceanic & Atmospheric Administration - 11 NOAA-12 > National Oceanic & Atmospheric Administration - 12 NOAA-14 > National Oceanic & Atmospheric Administration - 14 NOAA-15 > National Oceanic & Atmospheric Administration - 15 NOAA-16 > National Oceanic & Atmospheric Administration - 16 NOAA-17 > National Oceanic & Atmospheric Administration - 17 NOAA-18 > National Oceanic & Atmospheric Administration - 18 NOAA-19 > National Oceanic & Atmospheric Administration - 19 MetOp-A > Meteorological Operational Satellite - A MetOp-B > Meteorological Operational Satellite - B
Instrument keywords	Global Change Master Directory (GCMD) Instrument Keywords AVHRR > Advanced Very High Resolution Radiometer AVHRR-2 > Advanced Very High Resolution Radiometer-2 AVHRR-3 > Advanced Very High Resolution Radiometer-3 HIRS > High Resolution Infrared Radiation Sounder
Place keywords	Global Change Master Directory (GCMD) Location Keywords Geographic Region > Global
Project keywords	Global Change Master Directory (GCMD) Project Keywords NOAA Climate Data Record (CDR) Program NOAA OneStop Project


Use Constraints	Cite as: Foster, Michael J.; Phillips, Coda; Heidinger, Andrew K.; and NOAA CDR Program (2021): NOAA Climate Data Record (CDR) of Advanced Very High Resolution Radiometer (AVHRR) and High-resolution Infra-Red Sounder (HIRS) Reflectance, Brightness Temperature, and Cloud Products from Pathfinder Atmospheres - Extended (PATMOS-x), Version 6.0. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.7289/V5X9287S [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 custom orders, data certifications, copies of analog materials, and data distribution on physical media.

Use Constraints

Cite as: Foster, Michael J.; Phillips, Coda; Heidinger, Andrew K.; and NOAA CDR Program (2021): NOAA Climate Data Record (CDR) of Advanced Very High Resolution Radiometer (AVHRR) and High-resolution Infra-Red Sounder (HIRS) Reflectance, Brightness Temperature, and Cloud Products from Pathfinder Atmospheres - Extended (PATMOS-x), Version 6.0. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.7289/V5X9287S [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 custom orders, data certifications, copies of analog materials, and data distribution on physical media.

Lineage information for: dataset
Lineage Statement	The data were produced by the University of Wisconsin – Madison CIMSS (Cooperative Institute for Meteorological Satellite Studies) and are archived at the NOAA National Centers for Environmental Information (NCEI).
Processor	UWI-MAD/SSEC/CIMSS > Cooperative Institute for Meteorological Satellite Studies, Space Science and Engineering Center, University of Wisconsin, Madison
Processing Steps	For a description of the processing steps, see the Algorithm Theoretical Basis Document and Data Flow Diagram for this dataset.
Processing Documents	PATMOS-x Source Code AVHRR+HIRS Reflectance CDR Source Code (download) This source code is for reference only. The source code is provided to maintain transparency of the algorithm and processes used in creating the Climate Data Record (CDR). The source code is not intended to be portable to any computer system(s) beyond that of the original CDR producer's environment. AVHRR+HIRS Cloud Properties CDR Source Code (download) This source code is for reference only. The source code is provided to maintain transparency of the algorithm and processes used in creating the Climate Data Record (CDR). The source code is not intended to be portable to any computer system(s) beyond that of the original CDR producer's environment. PATMOS-x Data Flow Diagram AVHRR+HIRS Reflectance CDR Data Flow Diagram Data processing flowchart for the CDR product. AVHRR+HIRS Cloud Properties CDR Data Flow Diagram Data processing flowchart for the CDR product. PATMOS-x Algorithm Description AVHRR+HIRS Reflectance CDR Algorithm Description Algorithm Description for the CDR product. AVHRR+HIRS Cloud Properties CDR Algorithm Description Algorithm Description for the CDR product.
Source Datasets	AVHRR Global Area Coverage (GAC) Level 1b dataset Land Surface Ancillary Data Reanalysis Data

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: 2023-08-10

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