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Dataset

 

Sentinel 5P: Sulphur Dioxide (SO2) Total Column level 2 data

Latest Data Update: 2023-04-18
Status: Ongoing
Online Status: ONLINE
Publication State: Published
Publication Date: 2022-11-07
Download Stats: last 12 months
Dataset Size: 54.47K Files | 24TB

Abstract

This dataset contains total column Sulphur Dioxide (SO2) data from the TROPOspheric Monitoring Instrument (TROPOMI) aboard the Sentinel 5P satellite.

Sentinel 5 Precursor (S5P) was launched on the 13th October 2017 carrying the TROPOspheric Monitoring Instrument (TROPOMI). The TROPOMI instrument is a nadir-viewing, imaging spectrometer covering wavelength bands between the ultraviolet and the shortwave infrared. The instrument uses passive remote sensing techniques to attain its objective by measuring, at the Top Of Atmosphere (TOA), the solar radiation reflected by and radiated from the earth.

Sulphur dioxide (SO2) enters the Earth’s atmosphere through both natural and anthropogenic processes. It plays a role in chemistry on a local and global scale and its impact ranges from short-term pollution to effects on climate. Only about 30% of the emitted SO2 comes from natural sources; the majority is of anthropogenic origin. SO2 emissions adversely affect human health and air quality. SO2 has an effect on climate through radiative forcing, via the formation of sulphate aerosols. Volcanic SO2 emissions can also pose a threat to aviation, along with volcanic ash. S5P/TROPOMI samples the Earth’s surface with a revisit time of one day with an unprecedented spatial resolution of 3.5 x 7 km which allows the resolution of fine details including the detection of much smaller SO2 plumes.

Besides the total column of SO2, enhanced levels of SO2 are flagged within the products. The recognition of enhanced SO2 values is essential in order to detect and monitor volcanic eruptions and anthropogenic pollution sources. Volcanic SO2 emissions may also pose a threat to aviation, along with volcanic ash.

Citable as:  Copernicus; European Space Agency (2022): Sentinel 5P: Sulphur Dioxide (SO2) Total Column level 2 data. NERC EDS Centre for Environmental Data Analysis, date of citation. https://catalogue.ceda.ac.uk/uuid/19a97e70e5a848ddaebac0243ff41684
Abbreviation: Not defined
Keywords: Sentinel, Sulphur Dioxide, SO2, TROPOMI

Details

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Use of these data is covered by the following licence: https://sentinel.esa.int/documents/247904/690755/Sentinel_Data_Legal_Notice. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

Data collected and prepared by European Space Agency (ESA). Downloaded from the Collaborative Hub for use by CEDA users.

Data Quality:
See dataset associated documentation
File Format:
These 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

TROPOspheric Monitoring Instrument (TROPOMI) Deployed on: Sentinel 5 Precursor

Computation Element: 1

Title Level 2 Sulphur Dioxide (SO2) total column processing algorithm applied to Sentinel 5P TROPOspheric Monitoring Instrument (TROPOMI) raw data
Abstract The baseline operation flow of the scheme is based on a DOAS retrieval algorithm and is identical to that implemented in the retrieval algorithm for HCHO (also developed by BIRA-IASB, see S5P HCHO ATBD [RD12]). The main output of the algorithm are SO2 vertical column density, slant column density, air mass factor, Averaging Kernels (AK), and error estimates. Here, we will first briefly discuss the principle of the DOAS VCD retrieval before discussing the separate steps of the process in more detail. First, the radiance and irradiance data are read from an S5P L1b file, along with geolocation data such as pixel coordinates and observation geometry (sun and viewing angles). At this stage also cloud cover information is obtained from the S5P cloud L2 data, as required for the calculation of the AMF, later in the scheme. Then relevant absorption cross-section data (SO2), as well as characteristics of the instrument (e.g., slit functions) are used as input for the SO2 slant column density determination. As a baseline, the slant column fit is done in a sensitive window from 312 to 326 nm. For pixels with a strong SO2 signal, results from alternative windows, where the SO2 absorption is weaker, can be used instead. An empirical offset correction (dependent on the fitting window used) is then applied to the SCD. The latter correction accounts for systematic biases in the SCDs. Following the SCD determination, the AMF is estimated. For computational efficiency, the algorithm makes no ‘on the fly’ calculation but uses a pre-calculated box air mass factor look-up table (LUT). This lookup-table is generated using the LIDORT radiative transfer code and has several entries: cloud cover data, topographic information, observation geometry, surface albedo, effective wavelength (representative of the fitting window used), total ozone column, and the shape of the vertical SO2 profile. The algorithm also includes an error calculation and retrieval characterization module that computes the so-called DOAS-type averaging kernels (Eskes & Boersma, 2003), which characterize the vertical sensitivity of the measurement and which are required for comparison with other types of data (Veefkind et al., 2012). For more information please look at the ATBD document on the TROPOMI website.
Input Description None
Output Description None
Software Reference None
Output Description

None

  • units: 1
  • long_name: DOAS polynomial coefficients
  • var_id: doas_polynomial_coefficients_win3
  • units: m s-1
  • standard_name: eastward_wind
  • var_id: eastward_wind
  • long_name: Eastward wind from ECMWF at 10 meter height level
  • var_id: instrument_configuration_identifier
  • long_name: IcID
  • var_id: instrument_configuration_version
  • long_name: IcVersion
  • units: m s-1
  • standard_name: northward_wind
  • var_id: northward_wind
  • long_name: Northward wind from ECMWF at 10 meter height level
  • units: 1
  • var_id: number_of_spectral_points_in_retrieval
  • long_name: Number of spectral points used in the DOAS retrieval
  • units: 1
  • var_id: number_of_spectral_points_in_retrieval_win1
  • long_name: Number of spectral points used in the DOAS retrieval for window 1
  • units: 1
  • var_id: number_of_spectral_points_in_retrieval_win2
  • long_name: Number of spectral points used in the DOAS retrieval for window 2
  • units: 1
  • var_id: number_of_spectral_points_in_retrieval_win3
  • long_name: Number of spectral points used in the DOAS retrieval for window 3
  • units: 1
  • var_id: number_of_spectral_points_in_retrieval
  • long_name: Number of spectral points used in the retrieval
  • units: 1
  • long_name: Processing quality flags
  • var_id: processing_quality_flags
  • var_id: time_utc
  • long_name: Time of observation as ISO 8601 date-time string
  • units: 1
  • var_id: ground_pixel
  • long_name: across-track dimension index
  • units: 1
  • var_id: aerosol_index_340_380
  • standard_name: ultraviolet_aerosol_index
  • long_name: aerosol index from 380 and 340 nm
  • units: 1
  • var_id: scanline
  • long_name: along-track dimension index
  • units: 1
  • var_id: averaging_kernel
  • long_name: averaging kernel
  • units: mol m-2
  • var_id: sulfurdioxide_slant_column_corrected
  • long_name: background corrected sulfur dioxide slant column density for final selected fitting window
  • units: mol m-2
  • var_id: sulfurdioxide_slant_column_corrected_win1
  • long_name: background corrected sulfur dioxide slant column density for fitting window 1
  • units: mol m-2
  • var_id: sulfurdioxide_slant_column_corrected_win2
  • long_name: background corrected sulfur dioxide slant column density for fitting window 2
  • units: mol m-2
  • var_id: sulfurdioxide_slant_column_corrected_win3
  • long_name: background corrected sulfur dioxide slant column density for fitting window 3
  • units: 1
  • var_id: calibration_subwindows_root_mean_square_win1
  • long_name: calibration rms per subwindow in fitting window 1
  • units: 1
  • var_id: calibration_subwindows_root_mean_square_win2
  • long_name: calibration rms per subwindow in fitting window 2
  • units: 1
  • var_id: calibration_subwindows_root_mean_square_win3
  • long_name: calibration rms per subwindow in fitting window 3
  • units: nm
  • var_id: calibration_subwindows_wavelength_win1
  • long_name: calibration wavelength center in each subwindow in fitting window 1
  • units: nm
  • var_id: calibration_subwindows_wavelength_win2
  • long_name: calibration wavelength center in each subwindow in fitting window 2
  • units: nm
  • var_id: calibration_subwindows_wavelength_win3
  • long_name: calibration wavelength center in each subwindow of the wavelength calibration in window 3
  • units: 1
  • var_id: sulfurdioxide_clear_air_mass_factor_15km
  • long_name: clear sky air mass factor for a sulfur dioxide plume at 15km altitude w.r.t. the sea level
  • units: 1
  • var_id: sulfurdioxide_clear_air_mass_factor_1km
  • long_name: clear sky air mass factor for a sulfur dioxide plume at 1km altitude w.r.t. the topography
  • units: 1
  • var_id: sulfurdioxide_clear_air_mass_factor_7km
  • long_name: clear sky air mass factor for a sulfur dioxide plume at 7km altitude w.r.t. the sea level
  • units: 1
  • var_id: sulfurdioxide_clear_air_mass_factor_polluted
  • long_name: clear sky air mass factor for the boundary layer polluted scenario
  • units: 1
  • standard_name: cloud_albedo
  • long_name: cloud albedo from the CRB model
  • var_id: cloud_albedo_crb
  • units: 1
  • standard_name: cloud_albedo_standard_error
  • long_name: cloud albedo precision from the CRB model
  • var_id: cloud_albedo_crb_precision
  • units: 1
  • var_id: cloud_fraction_intensity_weighted
  • long_name: cloud fraction intensity weighted
  • units: m
  • standard_name: TBD
  • long_name: cloud radiometric optical centroid height from the CRB model
  • var_id: cloud_height_crb
  • units: m
  • standard_name: TBD
  • long_name: cloud radiometric optical centroid height precision from the CRB model
  • var_id: cloud_height_crb_precision
  • units: Pa
  • standard_name: TBD
  • var_id: cloud_pressure_crb
  • long_name: cloud radiometric optical centroid pressure from the CRB model
  • units: Pa
  • standard_name: TBD
  • var_id: cloud_pressure_crb_precision
  • long_name: cloud radiometric optical centroid pressure precision from the CRB model
  • units: 1
  • var_id: sulfurdioxide_cloudy_air_mass_factor_15km
  • long_name: cloudy sky air mass factor for a sulfur dioxide plume at 15km altitude w.r.t. the sea level
  • units: 1
  • var_id: sulfurdioxide_cloudy_air_mass_factor_1km
  • long_name: cloudy sky air mass factor for a sulfur dioxide plume at 1km altitude w.r.t. the topography
  • units: 1
  • var_id: sulfurdioxide_cloudy_air_mass_factor_7km
  • long_name: cloudy sky air mass factor for a sulfur dioxide plume at 7km altitude w.r.t. the sea level
  • units: 1
  • var_id: sulfurdioxide_cloudy_air_mass_factor_polluted
  • long_name: cloudy sky air mass factor for the boundary layer polluted scenario
  • units: 1
  • var_id: calibration_polynomial_coefficients_win1
  • long_name: computed coefficients of the polynomial function in fitting window 1
  • units: 1
  • var_id: calibration_polynomial_coefficients_win2
  • long_name: computed coefficients of the polynomial function in fitting window 2
  • units: 1
  • var_id: calibration_polynomial_coefficients_win3
  • long_name: computed coefficients of the polynomial function in fitting window 3
  • units: 1
  • long_name: data quality value
  • var_id: qa_value_box_profile
  • units: 1
  • var_id: degrees_of_polynomial_shift_win1
  • long_name: degrees_of_polynomial_shift_win1 dimension index
  • units: 1
  • var_id: degrees_of_polynomial_shift_win2
  • long_name: degrees_of_polynomial_shift_win2 dimension index
  • units: 1
  • var_id: degrees_of_polynomial_shift_win3
  • long_name: degrees_of_polynomial_shift_win3 dimension index
  • units: 1
  • var_id: detector_rows
  • long_name: detector_rows dimension index
  • var_id: earthshine_reference_radiance
  • units: mol.m-2.nm-1.sr-1.s-1
  • units: nm
  • var_id: earthshine_reference_wavelength
  • units: 1
  • standard_name: TBD
  • long_name: effective radiometric cloud fraction from the CRB model
  • var_id: cloud_fraction_crb
  • units: 1
  • standard_name: TBD
  • long_name: effective radiometric cloud fraction precision from the CRB model
  • var_id: cloud_fraction_crb_precision
  • units: 1
  • var_id: selected_fitting_window_flag
  • long_name: flag describing the selected fitting window for sulfur dioxide retrieval
  • units: 1
  • var_id: satellite_orbit_phase
  • long_name: fractional satellite orbit phase
  • units: 1
  • long_name: ground pixel quality flag
  • var_id: geolocation_flags
  • units: 1
  • var_id: histogram_axis
  • units: nm
  • var_id: calibration_subwindows_shift_win2
  • long_name: irradiance wavelengths shift fitted values per subwindow in fitting window 2
  • units: nm
  • var_id: calibration_subwindows_shift_win1
  • long_name: irradiance wavelengths shift values per subwindow in fitting window 1
  • units: nm
  • var_id: calibration_subwindows_shift_win3
  • long_name: irradiance wavelengths shift values per subwindow in fitting window 3
  • units: 1
  • var_id: calibration_subwindows_squeeze_win2
  • long_name: irradiance wavelengths squeeze fitted values per subwindow in fitting window 1
  • units: 1
  • var_id: calibration_subwindows_squeeze_win3
  • long_name: irradiance wavelengths squeeze fitted values per subwindow in fitting window 3
  • units: 1
  • var_id: surface_classification
  • long_name: land-water mask
  • units: degrees_north
  • var_id: lat_grid
  • units: degrees_north
  • var_id: latitude_bounds
  • units: 1
  • var_id: layer
  • long_name: layer dimension index
  • units: degrees_east
  • var_id: longitude_bounds
  • units: 1
  • var_id: number_of_iterations_in_retrieval
  • long_name: number of iterations used in the retrieval
  • units: 1
  • var_id: number_of_iterations_in_retrieval_win1
  • long_name: number of iterations used in the retrieval for window 1
  • units: 1
  • var_id: number_of_iterations_in_retrieval_win2
  • long_name: number of iterations used in the retrieval for window 2
  • units: 1
  • var_id: number_of_iterations_in_retrieval_win3
  • long_name: number of iterations used in the retrieval for window 3
  • units: 1
  • var_id: number_of_spectral_points_in_retrieval_win1
  • long_name: number of spectral points used in the retrieval for window 1
  • units: 1
  • var_id: number_of_spectral_points_in_retrieval_win2
  • long_name: number of spectral points used in the retrieval for window 2
  • units: 1
  • var_id: number_of_spectral_points_in_retrieval_win3
  • long_name: number of spectral points used in the retrieval for window 3
  • units: 1
  • var_id: number_of_calibrations
  • long_name: number_of_calibrations dimension index
  • units: 1
  • var_id: number_of_doas_polynomial_coefficients_win1
  • long_name: number_of_doas_polynomial_coefficients_win1 dimension index
  • units: 1
  • var_id: number_of_doas_polynomial_coefficients_win2
  • long_name: number_of_doas_polynomial_coefficients_win2 dimension index
  • units: 1
  • var_id: number_of_doas_polynomial_coefficients_win3
  • long_name: number_of_doas_polynomial_coefficients_win3 dimension index
  • units: 1
  • var_id: number_of_slant_columns_win1
  • long_name: number_of_slant_columns_win1 dimension index
  • units: 1
  • var_id: number_of_slant_columns_win2
  • long_name: number_of_slant_columns_win2 dimension index
  • units: 1
  • var_id: number_of_slant_columns_win3
  • long_name: number_of_slant_columns_win3 dimension index
  • units: 1
  • var_id: number_of_subwindows_win1
  • long_name: number_of_subwindows_win1 dimension index
  • units: 1
  • var_id: number_of_subwindows_win2
  • long_name: number_of_subwindows_win2 dimension index
  • units: 1
  • var_id: number_of_subwindows_win3
  • long_name: number_of_subwindows_win3 dimension index
  • units: DU
  • var_id: o3_grid
  • units: milliseconds
  • var_id: delta_time
  • long_name: offset from reference start time of measurement
  • units: 1
  • var_id: pdf_axis
  • units: 1
  • var_id: corner
  • long_name: pixel corner index
  • units: nm
  • var_id: fitted_radiance_shift
  • long_name: radiance wavelength shift from the doas fit
  • units: nm
  • var_id: fitted_radiance_shift_win1
  • long_name: radiance wavelength shift from the doas fit in fitting window 1
  • units: 1
  • var_id: fitted_radiance_squeeze_win2
  • long_name: radiance wavelength shift from the doas fit in fitting window 2
  • units: 1
  • var_id: fitted_radiance_squeeze_win3
  • long_name: radiance wavelength shift from the doas fit in fitting window 3
  • units: 1
  • var_id: fitted_radiance_squeeze
  • long_name: radiance wavelength squeeze from the doas fit
  • units: 1
  • var_id: fitted_radiance_squeeze_win1
  • long_name: radiance wavelength squeeze from the doas fit in fitting window 1
  • units: 1
  • var_id: cloud_fraction_intensity_weighted_precision
  • long_name: random error of the cloud fraction intensity weighted
  • units: 1
  • var_id: sulfurdioxide_total_air_mass_factor_15km_precision
  • long_name: random error of the total air mass factor for a sulfur dioxide plume at 15km altitude w.r.t. the sea level
  • units: 1
  • var_id: sulfurdioxide_total_air_mass_factor_1km_precision
  • long_name: random error of the total air mass factor for a sulfur dioxide plume at 1km altitude w.r.t. the topography
  • units: 1
  • var_id: sulfurdioxide_total_air_mass_factor_7km_precision
  • long_name: random error of the total air mass factor for a sulfur dioxide plume at 7km altitude w.r.t. the sea level
  • units: 1
  • var_id: sulfurdioxide_total_air_mass_factor_polluted_precision
  • long_name: random error of the total air mass factor for the boundary layer polluted scenario
  • units: 1
  • var_id: fitted_root_mean_square
  • long_name: root mean square of the sulfur dioxide slant column
  • units: 1
  • var_id: fitted_root_mean_square_win1
  • long_name: root mean square residual of the fit in fitting window 1
  • units: 1
  • var_id: fitted_root_mean_square_win2
  • long_name: root mean square residual of the fit in fitting window 2
  • units: 1
  • var_id: fitted_root_mean_square_win3
  • long_name: root mean square residual of the fit in fitting window 3
  • units: m
  • var_id: satellite_altitude
  • long_name: satellite altitude
  • units: degrees_east
  • var_id: satellite_longitude
  • long_name: satellite_longitude
  • units: 1
  • var_id: scaled_small_pixel_variance
  • long_name: scaled small pixel variance
  • units: 1
  • var_id: sulfurdioxide_averaging_kernel_scaling_box_15km
  • long_name: scaling box of the total air mass factor for a sulfur dioxide plume at 15km altitude w.r.t. the sea level
  • units: 1
  • var_id: sulfurdioxide_averaging_kernel_scaling_box_1km
  • long_name: scaling box of the total air mass factor for a sulfur dioxide plume at 1km altitude w.r.t. the topography
  • units: 1
  • var_id: sulfurdioxide_averaging_kernel_scaling_box_7km
  • long_name: scaling box of the total air mass factor for a sulfur dioxide plume at 7km altitude w.r.t. the sea level
  • units: 1
  • var_id: sea_ice_cover
  • long_name: sea-ice-cover
  • units: mol m-2
  • var_id: fitted_slant_columns_win2_precision
  • long_name: slant column random all absorbers in fitting window 2
  • units: mol m-2
  • var_id: fitted_slant_columns_win1_precision
  • long_name: slant column random errors of all absorbers in fitting window 1
  • units: mol m-2
  • var_id: fitted_slant_columns_win3_precision
  • long_name: slant column random errors of all absorbers in fitting window 3
  • units: mol m-2
  • var_id: fitted_slant_columns_win1
  • long_name: slant columns of all absorbers in fitting window 1
  • units: mol m-2
  • var_id: fitted_slant_columns_win2
  • long_name: slant columns of all absorbers in fitting window 2
  • units: mol m-2
  • var_id: fitted_slant_columns_win3
  • long_name: slant columns of all absorbers in fitting window 3
  • units: 1
  • var_id: snow_cover
  • long_name: snow-cover
  • units: 1
  • long_name: snow-ice mask
  • var_id: snow_ice_flag_nise
  • units: degree
  • standard_name: solar_azimuth_angle
  • long_name: solar azimuth angle
  • var_id: solar_azimuth_angle
  • units: degree
  • long_name: solar zenith angle
  • var_id: solar_zenith_angle
  • standard_name: solar_zenith_angle
  • units: degrees_north
  • var_id: satellite_latitude
  • long_name: sub satellite latitude
  • units: 1
  • var_id: sulfurdioxide_slant_column_correction_flag
  • long_name: sulfur dioxide slant column density background correction flag
  • units: 1
  • var_id: sulfurdioxide_detection_flag
  • long_name: sulfur dioxide volcano activity flag
  • units: 1
  • var_id: sulfurdioxide_total_column_histogram
  • units: 1
  • var_id: sulfurdioxide_total_column_pdf
  • units: 1
  • standard_name: surface_albedo
  • var_id: surface_albedo_328nm
  • long_name: surface albdeo at 328nm
  • units: 1
  • standard_name: surface_albedo
  • var_id: surface_albedo_376nm
  • long_name: surface albdeo at 376nm
  • units: m
  • standard_name: surface_altitude
  • var_id: surface_altitude
  • long_name: surface altitude
  • units: m
  • var_id: surface_altitude_precision
  • standard_name: surface_altitude standard_error
  • long_name: surface altitude precision
  • units: Pa
  • standard_name: surface_air_pressure
  • long_name: surface_air_pressure
  • var_id: surface_pressure
  • units: K
  • var_id: surface_temperature
  • standard_name: surface_air_temperature
  • long_name: surface_air_temperature
  • units: mol m-2
  • var_id: sulfurdioxide_slant_column_corrected_trueness
  • long_name: systematic error of the corrected sulfur dioxide slant column
  • units: 1
  • var_id: sulfurdioxide_total_air_mass_factor_15km_trueness
  • long_name: systematic error of the total air mass factor for a sulfur dioxide plume at 15km altitude w.r.t. the sea level
  • units: 1
  • var_id: sulfurdioxide_total_air_mass_factor_1km_trueness
  • long_name: systematic error of the total air mass factor for a sulfur dioxide plume at 1km altitude w.r.t. the topography
  • units: 1
  • var_id: sulfurdioxide_total_air_mass_factor_7km_trueness
  • long_name: systematic error of the total air mass factor for a sulfur dioxide plume at 7km altitude w.r.t. the sea level
  • units: 1
  • var_id: sulfurdioxide_total_air_mass_factor_polluted_trueness
  • long_name: systematic error of the total air mass factor for the boundary layer polluted scenario
  • units: 1
  • var_id: sulfurdioxide_total_air_mass_factor_polluted_kernel_trueness
  • long_name: systematic error of the total air mass factor for the kernel polluted scenario
  • units: 1
  • var_id: sulfurdioxide_total_air_mass_factor_15km_kernel_trueness
  • long_name: systematic error of the total air mass factor using kernels for a sulfur dioxide plume at 15km altitude w.r.t. the sea level
  • units: 1
  • var_id: sulfurdioxide_total_air_mass_factor_1km_kernel_trueness
  • long_name: systematic error of the total air mass factor using kernels for a sulfur dioxide plume at 1km altitude w.r.t. the topography
  • units: 1
  • var_id: sulfurdioxide_total_air_mass_factor_7km_kernel_trueness
  • long_name: systematic error of the total air mass factor using kernels for a sulfur dioxide plume at 7km altitude w.r.t. the sea level
  • units: mol m-2
  • var_id: sulfurdioxide_total_vertical_column_15km_trueness
  • long_name: systematic error of the total vertical column density of sulfur dioxide for a sulfur dioxide plume at 15km altitude w.r.t. the sea level
  • units: mol m-2
  • var_id: sulfurdioxide_total_vertical_column_1km_trueness
  • long_name: systematic error of the total vertical column density of sulfur dioxide for a sulfur dioxide plume at 1km altitude w.r.t. the topography
  • units: mol m-2
  • var_id: sulfurdioxide_total_vertical_column_trueness
  • long_name: systematic error of the total vertical column density of sulfur dioxide for the polluted scenario
  • units: mol m-2
  • var_id: sulfurdioxide_total_vertical_column_7km_trueness
  • long_name: systematic error of the total vertical column of sulfur dioxide for a sulfur dioxide plume at 7km altitude w.r.t. the sea level
  • units: Pa
  • var_id: tm5_constant_a
  • units: 1
  • var_id: tm5_constant_b
  • units: 1
  • var_id: tm5_tropopause_layer_index
  • units: 1
  • var_id: sulfurdioxide_total_air_mass_factor_15km
  • long_name: total air mass factor for a sulfur dioxide plume at 15km altitude w.r.t. the sea level
  • units: 1
  • var_id: sulfurdioxide_total_air_mass_factor_1km
  • long_name: total air mass factor for a sulfur dioxide plume at 1km altitude w.r.t. the topography
  • units: 1
  • var_id: sulfurdioxide_total_air_mass_factor_7km
  • long_name: total air mass factor for a sulfur dioxide plume at 7km altitude w.r.t. the sea level
  • units: 1
  • var_id: sulfurdioxide_total_air_mass_factor_polluted
  • long_name: total air mass factor for boundary layer polluted scenario
  • standard_name: atmosphere_mole_content_of_ozone
  • units: mol m-2
  • var_id: ozone_total_vertical_column
  • long_name: total ozone column
  • units: mol m-2
  • var_id: ozone_total_vertical_column_precision
  • standard_name: atmosphere_mole_content_of_ozone error
  • long_name: total ozone column random error
  • units: mol m-2
  • var_id: sulfurdioxide_total_vertical_column
  • standard_name: atmosphere_mole_content_of_sulfur_dioxide
  • long_name: total vertical column of sulfur dioxide for the polluted scenario derived from the total slant column
  • units: 1
  • var_id: vertices
  • long_name: vertices dimension index
  • units: degree
  • standard_name: viewing_azimuth_angle
  • long_name: viewing azimuth angle
  • var_id: viewing_azimuth_angle
  • units: degree
  • long_name: viewing zenith angle
  • standard_name: viewing_zenith_angle
  • var_id: viewing_zenith_angle
  • units: 1
  • var_id: sulfurdioxide_profile_apriori
  • long_name: volume mixing ratio profile of sulfur dioxide
  • units: 1
  • var_id: wavelengths
  • long_name: wavelengths dimension index
  • units: mol m-2
  • var_id: window1_north
  • units: mol m-2
  • var_id: window1_south
  • units: mol m-2
  • var_id: window2
  • units: mol m-2
  • var_id: window3

Co-ordinate Variables

  • units: degrees_north
  • standard_name: latitude
  • var_id: latitude
  • long_name: pixel center latitude
  • units: degrees_east
  • standard_name: longitude
  • var_id: longitude
  • long_name: pixel center longitude
  • standard_name: time
  • var_id: time
  • units: seconds
  • long_name: reference time for the measurements
Coverage
Temporal Range
Start time:
2018-05-06T00:00:00
End time:
Ongoing
Geographic Extent

 
90.0000°
 
-180.0000°
 
180.0000°
 
-90.0000°