Dataset
University of Leicester GOSAT Proxy XCH4 v10.0
Abstract
The University of Leicester GOSAT Proxy XCH4 v10.0 data set contains column-averaged dry-air mole fraction of methane (XCH4) generated from the Greenhouse Gas Observing Satellite (GOSAT) Level 1B data using the University of Leicester Full-Physics retrieval scheme (UoL-FP) using the Proxy retrieval approach.
This data is an NCEO funded update/extension to the European Space Agency Climate Change Initiative (CCI) CH4_GOS_OCPR V7.0. and the Copernicus Climate Change Service (C3S) CH_4 v7.2 data sets. It's a full reprocessing, based on different underlying L1B radiance data with additional changes. GOSAT Level 1B files (version 220/221) were acquired directly from the National Institute for Environmental Studies (NIES) GOSAT Data Archive Service (GDAS) Data Server and are processed with the Leicester Retrieval Preparation Toolset to extract the measured radiances along with all required sounding-specific ancillary information such as the measurement time, location and geometry. The spectral data were then inputted into the UoL-FP retrieval algorithm where the Proxy retrieval approach is used to obtain the column-averaged dry-air mole fraction of methane (XCH4). Post-filtering and bias correction against the Total Carbon Column Observing Network is then performed. See process information and documentation for further details.
Details
| Previous Info: |
No news update for this record
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| Previously used record identifiers: |
No related previous identifiers.
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| 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(s): http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record. |
| Data lineage: |
Data were produced by the University of Leicester project team and delivered to Centre for Environmental Data Analysis (CEDA) for archival and publication. The data was produced under NCEO. |
| Data Quality: |
The data has been fully validated by the University of Leicester project team
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| File Format: |
Data are in NetCDF format
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Related Documents
Process overview
Computation Element: 1
| Title | Derivation of the University of Leicester GOSAT and GOSAT-2 Proxy XCH4 data |
| Abstract | The GOSAT and GOSAT-2 datasets were derived using the UoL-FP retrieval algorithm using a proxy retrieval approach. See the linked documentation for further information |
| Input Description | None |
| Output Description | None |
| Software Reference | None |
| Output Description | None |
- units: K
- long_name: air_temperature_apriori
- var_id: air_temperature_apriori
- units: 1e-9
- var_id: ch4_profile_apriori
- long_name: ch4_profile_apriori
- units: 1e-6
- var_id: co2_profile_apriori
- long_name: co2_profile_apriori
- units: 1
- long_name: exposure_id
- var_id: exposure_id
- units: 1
- long_name: gain
- var_id: gain
- units: 1e-6
- long_name: h2o_profile_apriori
- var_id: h2o_profile_apriori
- units: 1e-6
- long_name: model_xco2
- var_id: model_xco2
- units: 1e-6
- long_name: model_xco2_median_diff
- var_id: model_xco2_median_diff
- units: 1e-6
- long_name: model_xco2_range
- var_id: model_xco2_range
- units: hPa
- var_id: pressure_levels
- long_name: pressure_levels
- units: 1
- var_id: pressure_weight
- long_name: pressure_weight
- units: 1e-9
- long_name: raw_xch4
- var_id: raw_xch4
- units: 1e-9
- long_name: raw_xch4_error
- var_id: raw_xch4_error
- units: 1e-6
- long_name: raw_xco2
- var_id: raw_xco2
- units: 1e-6
- long_name: raw_xco2_error
- var_id: raw_xco2_error
- units: 1
- long_name: retr_flag
- var_id: retr_flag
- units: degree
- standard_name: sensor_zenith_angle
- var_id: sensor_zenith_angle
- long_name: sensor_zenith_angle
- units: degree
- var_id: solar_zenith_angle
- standard_name: solar_zenith_angle
- long_name: solar_zenith_angle
- units: hPa
- long_name: surface_air_pressure_apriori
- var_id: surface_air_pressure_apriori
- units: hPa
- long_name: surface_air_pressure_apriori_std
- var_id: surface_air_pressure_apriori_std
- units: m
- standard_name: surface_altitude
- var_id: surface_altitude
- long_name: surface_altitude
- units: m
- long_name: surface_altitude_stdev
- var_id: surface_altitude_stdev
- units: 1e-9
- var_id: xch4
- long_name: xch4
- standard_name: dry_atmosphere_mole_fraction_of_methane
- units: 1
- var_id: xch4_averaging_kernel
- long_name: xch4_averaging_kernel
- units: 1e-9
- var_id: xch4_no_correction
- long_name: xch4_no_correction
- units: 1
- var_id: xch4_quality_flag
- long_name: xch4_quality_flag
- units: 1e-9
- var_id: xch4_uncertainty
- long_name: xch4_uncertainty
- units: 1
- var_id: xco2_averaging_kernel
- long_name: xco2_averaging_kernel
Co-ordinate Variables
- units: degrees_north
- standard_name: latitude
- var_id: latitude
- long_name: latitude
- units: degrees_east
- standard_name: longitude
- var_id: longitude
- long_name: longitude
- long_name: time
- standard_name: time
- var_id: time
- units: seconds
Temporal Range
2009-04-23T00:00:00
2025-12-18T23:59:59
Geographic Extent
90.0000° |
||
-180.0000° |
180.0000° |
|
-90.0000° |