STFC RAL methane retrievals from IASI on board MetOp-A, version 2.0

This Infrared Atmospheric Sounding Interferometer (IASI) methane dataset contains height-resolved and column-averaged volume mixing ratios of atmospheric methane (CH4). It also includes column-averaged water vapour (H2O), a scale factor for the HDO (water vapour isotopologue) volume mixing ratio profile, surface temperature, effective cloud fraction, effective cloud-top pressure and scale factors for two systematic residual spectra which are jointly retrieved from the spectral range 1232.25-1290.00 cm-1 by the Rutherford Appleton Laboratory (RAL) IASI optimal estimation methane retrieval scheme. The dataset additionally contains selected a priori values and uncertainties adopted in the optimal estimation scheme and retrieval output diagnostics such as the retrieval cost and the averaging kernels.

This work was funded by the National Centre for Earth Observation (NCEO) under the UK Natural Environment Research Council (NERC) with additional funding from EUMETSAT.

Data were produced by the United Kingdom Research and Innnovation (UKRI) Science and Technology Facilities Council (STFC) Remote Sensing Group (RSG) at the Rutherford Appleton Laboratory (RAL).

This is version 2.0 of the dataset.

Date (Publication): 2020-02-25T13:35:49

Date (Creation): 2020-02-25T13:35:49

Citation identifier: https://catalogue.ceda.ac.uk/uuid/f717a8ea622f495397f4e76f777349d1

Citation identifier: Centre for Environmental Data Analysis (CEDA) / f717a8ea622f495397f4e76f777349d1

Citation identifier: doi / 10.5285/f717a8ea622f495397f4e76f777349d1

Point of contact

Organisation name	Individual name	Electronic mail address	Role
Unavailable	Siddans, Richard	Unavailable	Author
Unavailable	Knappett, Diane	Unavailable	Author
Unavailable	Kerridge, Brian	Unavailable	Author
Unavailable	Latter, Barry	Unavailable	Author
Unavailable	Waterfall, Alison	Unavailable	Author
Centre for Environmental Data Analysis (CEDA)		support@ceda.ac.uk	Custodian
Centre for Environmental Data Analysis (CEDA)		support@ceda.ac.uk	Distributor
Natural Environment Research Council (NERC)		unknown	Principal investigator
Centre for Environmental Data Analysis (CEDA)		support@ceda.ac.uk	pointofContact
Centre for Environmental Data Analysis (CEDA)		support@ceda.ac.uk	Publisher

Maintenance and update frequency: Not planned

Update scope: Dataset

Keywords

methane
IASI
optimal estimation
retrieval
averaging kernels
assimilation

GEMET - INSPIRE themes, version 1.0

orthoimagery

Access constraints: Other restrictions

Other constraints: Access to these data is available to any registered CEDA user. Please Login or Register for a CEDA account to gain access.

Use constraints: Other restrictions

Other constraints: Under the following licence http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/, appropriate use of these data may fall under any use. This message is intended as guidance, always read the full licence. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.

Spatial representation type: Grid

Language: English

Topic category

Imagery base maps earth cover

Begin date: 2007-05-31T23:00:00

End date: 2017-12-31T23:59:59

Unique resource identifier: WGS 84

Distribution format

Name	Version
Data are in NetCDF format.

Distributor contact

Organisation name	Individual name	Electronic mail address	Role
Centre for Environmental Data Analysis (CEDA)		support@ceda.ac.uk	Distributor

OnLine resource

Protocol	Linkage	Name
	https://catalogue.ceda.ac.uk/uuid/f717a8ea622f495397f4e76f777349d1	CEDA Data Catalogue Page

OnLine resource

Protocol	Linkage	Name
	http://data.ceda.ac.uk/neodc/iasi_ch4_ral/data/metop-a/l2/tir/v2.0/	DOWNLOAD

OnLine resource

Protocol	Linkage	Name
	https://www.atmos-meas-tech.net/10/4135/2017/	https://www.atmos-meas-tech.net/10/4135/2017/

OnLine resource

Protocol	Linkage	Name
	https://zenodo.org/record/7357303	RAL IASI MetOp-A TIR Methane Dataset v2.0 Product User Guide

Hierarchy level: Dataset

Conformance result

Title: Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services

Date (Publication): 2010-12-08

Statement: Data produced by the Rutherford Appleton Laboratory (RAL) Remote Sensing Group (RSG) at the United Kingdom Research and Innovation (UKRI) Science and Technology Facilities Council (STFC). The development of the Infrared Atmospheric Sounding Interferometer (IASI) offline thermal-IR methane retrieval was funded by the Natural Environment Research Council (NERC) through its National Centre for Earth Observation (NCEO) with additional funding from EUMETSAT.

Metadata

File identifier: f717a8ea622f495397f4e76f777349d1 XML

Metadata language: English

Character set: UTF8

Hierarchy level: Dataset

Date stamp: 2025-11-09T03:18:25

Metadata standard name: UK GEMINI

Metadata standard version: 2.3

Metadata author

Organisation name	Individual name	Electronic mail address	Role
Centre for Environmental Data Analysis (CEDA)		support@ceda.ac.uk	Point of contact

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