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FIDUCEO: Fundamental Climate Data Record of recalibrated brightness temperatures for the High-resolution Infrared Radiation Sounder (HIRS) with uncertainties, 1985 - 2016, v1.0

Latest Data Update: 2019-10-20
Status: Completed
Online Status: ONLINE
Publication State: Published
Publication Date: 2019-11-08
Download Stats: last 12 months
Dataset Size: 569.56K Files | 1TB


The FIDelity and Uncertainty in Climate data records from Earth Observations (FIDUCEO) project Fundamental Climate Data Record of recalibrated brightness temperatures for the High-resolution Infrared Radiation Sounder (HIRS) contains recalibrated brightness temperatures for HIRS for all editions of HIRS/2, HIRS/2I, HIRS/3, and HIRS/4, with metrologically traceable uncertainty estimates. This version is harmonised and anchored to infrared atmospheric sounding interferometer IASI via MetopA satellite.

It contains 40 years worth of data covering the period period 1985-03-10 to 2016-12-31. Each file contains: Basic telemetry: longitude, latitude, time, satellite and solar angles; Brightness temperatures for channels1--19; Independent and structured uncertainty for channels 1--19; A lookup table to convert between radiances and brightness temperatures for channels 1—19; A channel error correlation matrix; Two bitfields indicating identified problems with the data. For any data field that varies across the channels (such as brightness temperatures and their uncertainties).

Full documentation including product user guide, tutorials, the scientific basis and relevant publications are available in the documentation.

Citable as:  Holl, G.; Mittaz, J.; Merchant, C.J.; Mollard, J. (2019): FIDUCEO: Fundamental Climate Data Record of recalibrated brightness temperatures for the High-resolution Infrared Radiation Sounder (HIRS) with uncertainties, 1985 - 2016, v1.0. Centre for Environmental Data Analysis, date of citation.
Abbreviation: Not defined
Keywords: Ucnertainty, FIDUCEO, HIRS, Brightness Temperature


Previous Info:
No news update for this record
Previously used record identifiers:
No related previous identifiers.
Access rules:
Public data: access to these data is available to both registered and non-registered users.
Use of these data is covered by the following licence: When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

Data were supplied to CEDA for archival by Jon MIttaz of the University of Reading on behalf of the H2020 FIDUCEO project

Data Quality:
Data was dowloaded from the NOAA class archive and contains quality metricsdescribed in the documentation. It was then provide to CEDA byby fiduceo project team
File Format:
The file format is CF compliant NetCDF version 4. A full format specification can be found in the documentation

Process overview

This dataset was generated by a combination of instruments deployed on platforms and computations as detailed below.

Mobile platform operations

Mobile Platform Operation 1 Mobile Platform Operation for: NOAA-11
Mobile Platform Operation 2 Mobile Platform Operation for: NOAA-10
Mobile Platform Operation 3 Mobile Platform Operation for: NOAA-9
Mobile Platform Operation 4 Mobile Platform Operation for: NOAA-15
Mobile Platform Operation 5 Mobile Platform Operation for: NOAA-17
Mobile Platform Operation 6 Mobile Platform Operation for: NOAA-12
Mobile Platform Operation 7 Mobile Platform Operation for: NOAA-16
Mobile Platform Operation 8 Mobile Platform Operation for: NOAA-14
Mobile Platform Operation 9 Mobile Platform Operation for: Metop-A
Mobile Platform Operation 10 Mobile Platform Operation for: Metop-B
Mobile Platform Operation 11 Mobile Platform Operation for: NOAA-18
Mobile Platform Operation 12 Mobile Platform Operation for: NOAA-19

Computation Element: 1

Title FIDUCEO: HIRS Fundamental Climate Data Record V1.0
Abstract Core input data are L1B data files obtained from the NOAA CLASS archive, Spectral response functions are obtained from NOAA NESDIS STAR, PRT coefficients are obtained from CPIDS and also provided by NOAA and it was processed using version v1.00 of the FCDR_HIRS software. Please see documentation for further information
Input Description None
Output Description None
Software Reference None
Output Description


  • units: K
  • var_id: bt
  • standard_name: toa_brightness_temperature
  • long_name: Brightness temperature, NOAA/EUMETSAT calibrated
  • units: 1
  • var_id: channel_correlation_matrix_independent
  • long_name: Channel_correlation_matrix_independent_effects
  • units: 1
  • var_id: channel_correlation_matrix_structured
  • long_name: Channel_correlation_matrix_structured_effects
  • long_name: Indicator of original file
  • var_id: scanline_map_to_origl1bfile
  • long_name: Original_Scan_line_number
  • var_id: scanline_origl1b
  • units: um
  • long_name: Spectral Response Function wavelengths
  • var_id: SRF_wavelengths
  • long_name: Spectral Response Function weights
  • var_id: SRF_weights
  • units: dimensionless
  • var_id: channel
  • long_name: channel number
  • standard_name: status_flag
  • var_id: quality_channel_bitmask
  • long_name: channel_quality_flags_bitfield
  • long_name: cross_element_correlation_coefficients
  • var_id: cross_element_correlation_coefficients
  • long_name: cross_line_correlation_coefficients
  • var_id: cross_line_correlation_coefficients
  • units: degree
  • standard_name: sensor_azimuth_angle
  • long_name: local_azimuth_angle
  • var_id: satellite_azimuth_angle
  • var_id: lookup_table_BT
  • var_id: lookup_table_radiance
  • units: degree
  • var_id: satellite_zenith_angle
  • standard_name: platform_zenith_angle
  • standard_name: status_flag
  • var_id: quality_scanline_bitmask
  • long_name: quality_indicator_bitfield
  • var_id: x
  • units: dimensionless
  • long_name: scan position
  • var_id: y
  • units: dimensionless
  • long_name: scanline number
  • units: degree
  • standard_name: solar_azimuth_angle
  • var_id: solar_azimuth_angle
  • units: degree
  • var_id: solar_zenith_angle
  • standard_name: solar_zenith_angle
  • standard_name: status_flag
  • var_id: quality_pixel_bitmask
  • units: K
  • long_name: uncertainty from common errors
  • var_id: u_common
  • units: K
  • long_name: uncertainty from independent errors
  • var_id: u_independent
  • units: K
  • long_name: uncertainty from structured errors
  • var_id: u_structured

Co-ordinate Variables

  • units: degrees_north
  • standard_name: latitude
  • var_id: latitude
  • units: degrees_east
  • standard_name: longitude
  • var_id: longitude
  • standard_name: time
  • var_id: time
Temporal Range
Start time:
End time:
Geographic Extent