NOAA Climate Data Record (CDR) of GPS RO-Calibrated AMSU Channel 7 (Temperatures of Troposphere / Stratosphere, TTS), Version 1.0 (Version Superseded)

Mean Layer Temperature - UCAR (Upper Trop & Lower Strat)

browse graphicAMSU Channel 7 BT Sample Image
The Climate Data Records (CDR) for Channel 7 contains Radio Occulation (RO) calibrated brightness temperatures from AMSU-A channel 7 measurements at 54.9 GHz from 2001 through present on a 2.5 degree grid. Data are partitioned into yearly files with monthly variables, where each file contains RO-calibrated channel 7 brightness temperatures from AMSU-A measurements from NOAA-15, 16, 17, 18, 19, NASA AQUA and Metop-A. The dataset uses version 2010.2640 of the RO mission data from the UCAR COSMIC Data Analysis and Archival Center (CDAAC), the NOAA archive of the Level 1b AMSU dataset, and the NASA DAAC archive of the Aqua Level 1B dataset. The RO satellites measure the bending angle of GPS signals as they pass through the atmosphere. Temperature profiles are derived from these GPS bending angles from the COSMIC and CHAMP data from 2001 through present. Calibration coefficients are calculated from coincident measurements of AMSU channel 7 brightness temperatures and corresponding values derived from an AMSU forward model applied to temperature profile measurements from RO identified radiosondes. The monthly calibration coefficients are applied to adjust the AMSU Temperature Troposphere Stratosphere (TTS) measurements for each polar orbiter to the temperature profiles from the RO identified Radiosonde Observations (RAOBs). The calibrated AMSU measurements are then combined into gridded monthly values. From these the climatology is calculated using 12 years of data. Anomaly values are then obtained by subtracting this climatology from the monthly values.
  • Users must cite this dataset as: Ho, S.-P., M. Goldberg, Y.-H. Kuo, C.-Z Zou, W. Schreiner, and the NOAA CDR Program (2013): NOAA Climate Data Record (CDR) of GPS RO-Calibrated AMSU Channel 7 (Temperatures of Troposphere / Stratosphere, TTS), Version 1.0 [Indicate subset used]. NOAA National Centers for Environmental Information. [access date].
  • NCEI DSI 3659_01
  • gov.noaa.ncdc:C00799
Search Data
  • NCEI Customer Service (search)
    For access to this version of the dataset (superseded), please contact the Customer Engagement Branch.
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 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
CDR-IPT-MSU_AMSU_Temp@noaa.gov
Coverage Description
Time Period 2001-05-01 to Present
Spatial Bounding Box Coordinates
N: 90.0
S: -90.0
E: 180.0
W: -180.0
Spatial Coverage Map
Dataset Information
General Documentation
  • Mean Layer Temperature - UCAR (Upper Trop & Lower Strat) Version 1.0 (Version Superseded) Landing Page
    This dataset provides advanced scientific researchers a high quality Climate Data Record (CDR) of Upper Troposphere / Stratosphere Temperatures. The objective of this study is to use highly stable GPS RO data to identify high quality radiosonde data and sue the radiosonde data to calibrate AMSU-A channel 7 brightness temperatures and to further use the calibrated AMSU brightness temperatures to construct a consistent climate data record. This dataset would help for climate temperature trend studies, climate model validation, and for decision makers to establish climate policies.
Processing Documents
  • Source Code Package for AMSU Ch7, v1.0
  • Data Flow Diagram for AMSU Ch7, v1.0
  • Climate Algorithm Theoretical Basis Document (C-ATBD) for AMSU Ch7, v1.0
Associated Resources
Publication Dates
  • publication: 2013-11-07
  • creation: 2013-09-20
Edition Version 1.0
Data Presentation Form Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress Status Superseded - replaced by new
Data Update Frequency Not planned
Purpose This dataset provides advanced scientific researchers a high quality Climate Data Record (CDR) of Upper Troposphere / Stratosphere Temperatures. The objective of this study is to use highly stable GPS RO data to identify high quality radiosonde data and sue the radiosonde data to calibrate AMSU-A channel 7 brightness temperatures and to further use the calibrated AMSU brightness temperatures to construct a consistent climate data record. This dataset would help for climate temperature trend studies, climate model validation, and for decision makers to establish climate policies.
Use Limitations
  • For a complete description of use limitations for this CDR, see the Algorithm Theoretical Basis Document.
Dataset Citation
  • Users must cite this dataset as: Ho, S.-P., M. Goldberg, Y.-H. Kuo, C.-Z Zou, W. Schreiner, and the NOAA CDR Program (2013): NOAA Climate Data Record (CDR) of GPS RO-Calibrated AMSU Channel 7 (Temperatures of Troposphere / Stratosphere, TTS), Version 1.0 [Indicate subset used]. NOAA National Centers for Environmental Information. [access date].
Cited Authors
  • UCAR/COSMIC/CDAAC > COSMIC Data Analysis and Archive Center, Constellation Observing System for Meteorology, Ionosphere and Climate, University Corporation for Atmospheric Research
  • Ho, S.-P.
  • Goldberg, M.
  • Kuo, Y.-H.
  • Zou, C.-Z
  • Schreiner, W.
  • NOAA CDR Program
Principal Investigators
  • Ho, S.-P.
Collaborators
  • Goldberg, M.
  • Kuo, Y.-H.
  • Zou, C.-Z
  • Schreiner, W.
  • NOAA CDR Program
Resource Providers
  • UCAR/COSMIC/CDAAC > COSMIC Data Analysis and Archive Center, Constellation Observing System for Meteorology, Ionosphere and Climate, University Corporation for Atmospheric Research
Publishers
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
  • DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
Theme keywords Global Change Master Directory (GCMD) Science Keywords
  • Spectral/Engineering > Infrared Wavelengths > 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
  • UCAR/COSMIC/CDAAC > COSMIC Data Analysis and Archive Center, Constellation Observing System for Meteorology, Ionosphere and Climate, University Corporation for Atmospheric Research
Platform keywords Global Change Master Directory (GCMD) Platform Keywords
  • 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
  • AQUA > Earth Observing System, AQUA
  • METOP-A > Meteorological Operational Satellite - A
Instrument keywords Global Change Master Directory (GCMD) Instrument Keywords
  • AMSU-A > Advanced Microwave Sounding Unit-A
Place keywords Global Change Master Directory (GCMD) Location Keywords
  • Geographic Region > Global
Project keywords Keyword Thesaurus Title
  • NOAA Climate Data Record (CDR) Program
Data Resolution keywords Global Change Master Directory (GCMD) Temporal Data Resolution Keywords
  • Monthly Climatology
Use Constraints
  • Use Constraints: NCEI cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NCEI makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty. 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.
  • Users must cite this dataset as: Ho, S.-P., M. Goldberg, Y.-H. Kuo, C.-Z Zou, W. Schreiner, and the NOAA CDR Program (2013): NOAA Climate Data Record (CDR) of GPS RO-Calibrated AMSU Channel 7 (Temperatures of Troposphere / Stratosphere, TTS), Version 1.0 [Indicate subset used]. NOAA National Centers for Environmental Information. [access date].
  • Publications using this dataset should also reference the following journal article: Ho, S.-P., M. Goldberg, Y.-H. Kuo, C.-Z Zou, W. Schreiner, Calibration of Temperature in the Lower Stratosphere from Microwave Measurements using COSMIC Radio Occultation Data: Preliminary Results, Terr. Atmos. Oceanic Sci., Vol. 20, doi: 10.3319/TAO.2007.12.06.01(F3C), 2009.
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: dataset
Lineage Statement For a complete description of the processing steps, see the Algorithm Theoretical Basis Document and Data Flow Diagram.
Processing Documents
    • Source Code Package for AMSU Ch7, v1.0
    • Data Flow Diagram for AMSU Ch7, v1.0
    • Climate Algorithm Theoretical Basis Document (C-ATBD) for AMSU Ch7, v1.0
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: 2018-05-25
For questions about the information on this page, please email: ncei.orders@noaa.gov