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ESA Greenhouse Gases Climate Change Initiative (GHG_cci): Column-averaged methane from GOSAT-2, generated with the SRFP (RemoTeC) full physics retrieval algorithm (CH4_GO2_SRFP), version 2.0.0

Update Frequency: Not Planned
Latest Data Update: 2022-11-23
Status: Completed
Online Status: ONLINE
Publication State: Published
Publication Date: 2023-02-14
Download Stats: last 12 months
Dataset Size: 541 Files | 1009MB

This dataset has been superseded. See Latest Version here

This dataset contains column-averaged dry-air mole fractions (mixing ratios) of methane (XCH4). It has been produced using data acquired from the Thermal and Near Infrared Sensor for Carbon Observations - Fourier Transform Spectrometer-2 (TANSO-FTS-2) Near Infrared (NIR) and Shortwave Infrared (SWIR) spectra, onboard the Japanese Greenhouse gases Observing Satellite (GOSAT-2), using the Remote Sensing of Greenhouse Gases for Carbon Cycle Modeling (RemoTeC) SRON Full Physics (SRFP) retrieval algorithm. Results are provided for the individual GOSAT-2 spatial footprints.

These data have been produced as part of the European Space Agency (ESA)'s Climate Change Initiative (CCI) programme.

Citable as:  Borsdorff, T.; Krisna, T.C.; Aben, I.; Wu, L.; Hasekamp, O.; Landgraf, J. (2023): ESA Greenhouse Gases Climate Change Initiative (GHG_cci): Column-averaged methane from GOSAT-2, generated with the SRFP (RemoTeC) full physics retrieval algorithm (CH4_GO2_SRFP), version 2.0.0. NERC EDS Centre for Environmental Data Analysis, date of citation.
Abbreviation: Not defined
Keywords: ESA, CCI, satellite, atmosphere, methane, CH4


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 processed by the ESA CCI GHG project team and supplied to CEDA as part of the ESA CCI Open Data Portal Project. These data have been produced as part of the European Space Agency (ESA)'s Climate Change Initiative (CCI+) programme.

Data Quality:
For further information see the End to End ECV Uncertainty budget report
File Format:
Data are in NetCDF format.

Process overview

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

Instrument/Platform pairings

TANSO-FTS/2 Deployed on: GOSAT-2

Computation Element: 1

Title The SRFP (Remotec) Full Physics retrieval algorithm
Abstract The RemoTeC retrieval algorithm has been jointly developed at SRON and KIT to retrieve column-averaged methane and carbon dioxide, using a 'Full Physics' retrieval technique. Details of the technical aspects of the retrievals can be found in the ATBD (see documentation links)
Input Description None
Output Description None
Software Reference None
Output Description


  • units: 1e-9
  • long_name: 1-sigma uncertainty of the retrieved column-average dry-air mole fraction of atmospheric methane
  • var_id: xch4_uncertainty
  • long_name: Aerosol optical thickness per retrieval window
  • var_id: optical_thickness_of_atmosphere_layer_due_to_ambient_aerosol
  • units: K
  • var_id: air_temperature
  • long_name: Air temperature at each level
  • units: m
  • var_id: altitude
  • long_name: Altitude
  • long_name: Chi-squared
  • var_id: chi2
  • units: m-2
  • long_name: Dry airmass per layer
  • var_id: dry_airmass_layer
  • units: m-2
  • long_name: H2O total column
  • var_id: h2o_column
  • units: W cm-2
  • long_name: Intensity offset in the O2A-band
  • var_id: intensity_offset_o2a
  • units: 1e-9
  • var_id: raw_xch4
  • long_name: Raw retrieved XCH4 column
  • units: 1e-9
  • long_name: Raw uncertainty on the XCH4 total column
  • var_id: raw_xch4_err
  • units: m
  • long_name: Retrieved aerosol peak height
  • var_id: aerosol_central_height
  • units: m-2
  • long_name: Retrieved aerosol total column
  • var_id: aerosol_total_column
  • units: 1
  • long_name: Retrieved size parameter of the aerosol distribution
  • var_id: aerosol_size
  • units: m
  • long_name: Standard deviation of the surface elevation
  • var_id: surface_altitude_stdv
  • units: 1
  • long_name: Surface albedo at 1593 nm
  • var_id: surface_albedo_1593
  • units: 1
  • long_name: Surface albedo at 1629 nm
  • var_id: surface_albedo_1629
  • units: 1
  • long_name: Surface albedo at 2042 nm
  • var_id: surface_albedo_2042
  • units: 1
  • long_name: Surface albedo at 758 nm
  • var_id: surface_albedo_758
  • units: 1e-9
  • long_name: a priori dry-air mole fraction profile of atmospheric methane
  • var_id: ch4_profile_apriori
  • units: 1e-9
  • long_name: column-average dry-air mole fraction of atmospheric methane
  • var_id: xch4
  • units: 1
  • long_name: exposure id
  • var_id: exposure_id
  • units: 1
  • long_name: flag for land / ocean soundings
  • var_id: flag_landtype
  • units: 1
  • long_name: flag for normal / sunglint soundings
  • var_id: flag_sunglint
  • units: 1
  • long_name: gain
  • var_id: gain
  • units: m s-1
  • var_id: x_wind
  • long_name: grid_eastward_wind
  • units: m s-1
  • var_id: y_wind
  • long_name: grid_northward_wind
  • units: degrees_north
  • var_id: latitude
  • long_name: latitude
  • units: 1
  • var_id: l1b_name
  • long_name: level 1B name
  • units: degrees_east
  • var_id: longitude
  • long_name: longitude
  • units: 1
  • long_name: normalized column averaging kernel
  • var_id: xch4_averaging_kernel
  • units: 1
  • long_name: pressure weight
  • var_id: pressure_weight
  • units: hPa
  • var_id: pressure_levels
  • long_name: pressure_levels
  • units: degrees
  • var_id: sensor_zenith_angle
  • long_name: sensor zenith angle
  • units: 1
  • long_name: signal to noise ratio
  • var_id: signal_to_noise_window
  • units: degrees
  • long_name: solar zenith angle
  • var_id: solar_zenith_angle
  • long_name: time
  • var_id: time
  • units: seconds
  • units: 1
  • long_name: xch4_quality flag
  • var_id: xch4_quality_flag

Co-ordinate Variables

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