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Dataset

 
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FIDUCEO: Fundamental Climate Data Record of recalibrated brightness temperatures for the Advanced Very-High-Resolution Radiometer (AVHRR) with metrologically-traceable uncertainty estimates, 1998 - 2016, v1.0

Update Frequency: Not Planned
Status: Completed
Online Status: ONLINE
Publication State: Published
Publication Date: 2019-10-25
Download Stats: last 12 months

Abstract

This Fundamental Climate Data Record (FDCR) of recalibrated brightness temperatures for the Advanced Very-High-Resolution Radiometer (AVHRR) AVHRR/1, AVHRR/2 andAVHRR/3 with metrologically-traceable uncertainty estimates. Error covariance information is also provided.In this data set , in addition to relative reflectance for channels 1, 2 and 3A( when available) together with estimated independent, common and structured uncertainties are also provided.

The FIDelity and Uncertainty in Climate data records from Earth Observations (FIDUCEO) project AVHRR FCDR improves on existing AVHRR level-1B data (such as that processed by NOAA or EUMETSAT): the calibration has been improved with a measurement function approach such that the data is of better quality (noise has been reduced, outliers have been filtered) the metrologically traceable uncertainties have been derived together with their associated effects cross-channel correlations and long-term correlation structures have now been calculated from the processed data and are being understood and used to improve data quality and consistency all the sensors are calibrated to a common reference (AATSR series).The products have been harmonised across the satellite series using Simultaneous (Nadir) Overpasses (SNOs).

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

Citable as:  Mittaz, J.; Taylor, M.; Desmons, M.; Mollard, J.; Merchant, C.J. (2019): FIDUCEO: Fundamental Climate Data Record of recalibrated brightness temperatures for the Advanced Very-High-Resolution Radiometer (AVHRR) with metrologically-traceable uncertainty estimates, 1998 - 2016, v1.0. Centre for Environmental Data Analysis, date of citation. https://catalogue.ceda.ac.uk/uuid/67b206b17365444b8243182f04c8ba44
Abbreviation: Not defined
Keywords: Uncertainty, FIDUCEO, AVHRR, Fundamental Climate Data Record

Details

Previous Info:

2020-02-14 We are currently investigating the content of channel 3A files

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: http://creativecommons.org/licenses/by/4.0/. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

Supplied to CEDA for archival by John MIttaz of the University of Reading on behalf of the H2020 FIDUCEO project

Data Quality:
Validated by FIDUCEO project Jon Mittaz , Claire Bulgin and Esther Conway
File Format:
The files fomat is CF compliant NetCDF please see dicumentation for full format specification

Process overview

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

Instrument/Platform pairings

AVHRR series Deployed on: Metop-A

Mobile platform operations

Mobile Platform Operation 1 Mobile Platform Operation for: Metop-A

Computation Element: 1

Title FIDUCEO: AVHRR Fundamental Climate Data Record V1.0
Abstract The L1B data were generated from the on-board AVHRR instrument flying on various NOAA satellites, and subsequently processed by NOAA and archived in CLASS. The FIDUCEO team obtained the L1B data from the NOAA CLASS archive and processed it version v1.00 of the FCDR_AVHRR software. Please see documentation for further information
Input Description None
Output Description None
Software Reference None
Output Description None
  • long_name: Channel 1 Reflectance
  • standard_name: toa_reflectance
  • var_id: Ch1
  • units: 1
  • names: Channel 1 Reflectance, toa_reflectance
  • standard_name: toa_reflectance
  • long_name: Channel 2 Reflectance
  • var_id: Ch2
  • units: 1
  • names: toa_reflectance, Channel 2 Reflectance
  • long_name: Channel 3a Reflectance
  • standard_name: toa_reflectance
  • var_id: Ch3a
  • units: 1
  • names: toa_reflectance, Channel 3a Reflectance
  • long_name: Channel 3b Brightness Temperature
  • var_id: Ch3b
  • standard_name: toa_brightness_temperature
  • units: K
  • names: toa_brightness_temperature, Channel 3b Brightness Temperature
  • var_id: Ch4
  • units: K
  • standard_name: toa_brightness_temperature
  • long_name: Channel 4 Brightness Temperature
  • names: toa_brightness_temperature, Channel 4 Brightness Temperature
  • var_id: Ch5
  • units: K
  • standard_name: toa_brightness_temperature
  • long_name: Channel 5 Brightness Temperature
  • names: toa_brightness_temperature, Channel 5 Brightness Temperature
  • var_id: channel_correlation_matrix_independent
  • units: 1
  • long_name: Channel_correlation_matrix_independent_effects
  • names: Channel_correlation_matrix_independent_effects
  • long_name: Channel_correlation_matrix_structured_effects
  • var_id: channel_correlation_matrix_structured
  • units: 1
  • names: Channel_correlation_matrix_structured_effects
  • var_id: scanline_map_to_origl1bfile
  • long_name: Indicator of original file
  • names: Indicator of original file
  • long_name: Original_Scan_line_number
  • var_id: scanline_origl1b
  • names: Original_Scan_line_number
  • var_id: SRF_wavelengths
  • units: um
  • long_name: Spectral Response Function wavelengths
  • names: Spectral Response Function wavelengths
  • long_name: Spectral Response Function weights
  • var_id: SRF_weights
  • names: Spectral Response Function weights
  • standard_name: status_flag
  • long_name: bitmask for quality per channel
  • var_id: quality_channel_bitmask
  • names: status_flag, bitmask for quality per channel
  • long_name: bitmask for quality per pixel
  • var_id: data_quality_bitmask
  • standard_name: status_flag
  • names: status_flag, bitmask for quality per pixel
  • long_name: bitmask for quality per scanline
  • var_id: quality_scanline_bitmask
  • standard_name: status_flag
  • names: status_flag, bitmask for quality per scanline
  • var_id: channel
  • long_name: common uncertainty per pixel for channel 1
  • var_id: u_common_Ch1
  • units: percent
  • names: common uncertainty per pixel for channel 1
  • var_id: u_common_Ch2
  • units: percent
  • long_name: common uncertainty per pixel for channel 2
  • names: common uncertainty per pixel for channel 2
  • units: percent
  • var_id: u_common_Ch3a
  • long_name: common uncertainty per pixel for channel 3a
  • names: common uncertainty per pixel for channel 3a
  • long_name: common uncertainty per pixel for channel 3b
  • var_id: u_common_Ch3b
  • units: K
  • names: common uncertainty per pixel for channel 3b
  • long_name: common uncertainty per pixel for channel 4
  • var_id: u_common_Ch4
  • units: K
  • names: common uncertainty per pixel for channel 4
  • units: K
  • long_name: common uncertainty per pixel for channel 5
  • var_id: u_common_Ch5
  • names: common uncertainty per pixel for channel 5
  • long_name: cross_element_correlation_coefficients
  • var_id: cross_element_correlation_coefficients
  • names: cross_element_correlation_coefficients
  • var_id: cross_line_correlation_coefficients
  • long_name: cross_line_correlation_coefficients
  • names: cross_line_correlation_coefficients
  • var_id: u_independent_Ch1
  • units: Reflectance
  • long_name: independent uncertainty per pixel for channel 1
  • names: independent uncertainty per pixel for channel 1
  • units: Reflectance
  • var_id: u_independent_Ch2
  • long_name: independent uncertainty per pixel for channel 2
  • names: independent uncertainty per pixel for channel 2
  • units: Reflectance
  • long_name: independent uncertainty per pixel for channel 3a
  • var_id: u_independent_Ch3a
  • names: independent uncertainty per pixel for channel 3a
  • var_id: u_independent_Ch3b
  • units: K
  • long_name: independent uncertainty per pixel for channel 3b
  • names: independent uncertainty per pixel for channel 3b
  • long_name: independent uncertainty per pixel for channel 4
  • var_id: u_independent_Ch4
  • units: K
  • names: independent uncertainty per pixel for channel 4
  • long_name: independent uncertainty per pixel for channel 5
  • var_id: u_independent_Ch5
  • units: K
  • names: independent uncertainty per pixel for channel 5
  • var_id: latitude
  • var_id: lookup_table_BT
  • var_id: lookup_table_radiance
  • var_id: relative_azimuth_angle
  • units: degree
  • standard_name: relative_azimuth_angle
  • names: relative_azimuth_angle
  • var_id: satellite_zenith_angle
  • units: degree
  • standard_name: sensor_zenith_angle
  • names: sensor_zenith_angle
  • var_id: solar_zenith_angle
  • standard_name: solar_zenith_angle
  • units: degree
  • names: solar_zenith_angle
  • var_id: quality_pixel_bitmask
  • standard_name: status_flag
  • names: status_flag
  • units: Reflectance
  • long_name: structured uncertainty per pixel for channel 1
  • var_id: u_structured_Ch1
  • names: structured uncertainty per pixel for channel 1
  • units: Reflectance
  • long_name: structured uncertainty per pixel for channel 2
  • var_id: u_structured_Ch2
  • names: structured uncertainty per pixel for channel 2
  • units: Reflectance
  • long_name: structured uncertainty per pixel for channel 3a
  • var_id: u_structured_Ch3a
  • names: structured uncertainty per pixel for channel 3a
  • long_name: structured uncertainty per pixel for channel 3b
  • var_id: u_structured_Ch3b
  • units: K
  • names: structured uncertainty per pixel for channel 3b
  • long_name: structured uncertainty per pixel for channel 4
  • var_id: u_structured_Ch4
  • units: K
  • names: structured uncertainty per pixel for channel 4
  • long_name: structured uncertainty per pixel for channel 5
  • var_id: u_structured_Ch5
  • units: K
  • names: structured uncertainty per pixel for channel 5
  • var_id: x
  • var_id: y

Co-ordinate Variables

  • units: degrees_east
  • standard_name: longitude
  • var_id: longitude
  • names: longitude
  • units: s
  • standard_name: time
  • var_id: Time
  • names: time
Coverage
Temporal Range
Start time:
1988-10-11T23:00:00
End time:
2016-12-31T00:00:00
Geographic Extent

 
90.0000°
 
-180.0000°
 
180.0000°
 
-90.0000°