Dataset: ESA Greenhouse Gases Climate Change Initiative (GHG_cci): Column-averaged CH4 from GOSAT generated with the SRPR (RemoTeC) Proxy Retrieval algorithm (CH4_GOS_SRPR), version 2.3.8#
Dataset identifier: esacci.GHG.satellite-orbit-frequency.L2.CH4.TANSO-FTS.GOSAT.SRPR.v2-3-8.r1
Data store: cciodp
How to open this dataset in AVL JupyterLab
cciodp_store = new_data_store('cciodp')
ds = cciodp_store.open_data('esacci.GHG.satellite-orbit-frequency.L2.CH4.TANSO-FTS.GOSAT.SRPR.v2-3-8.r1')
Bounding box map#
cciodp_store = new_data_store('cciodp')
ds = cciodp_store.open_data('esacci.GHG.satellite-orbit-frequency.L2.CH4.TANSO-FTS.GOSAT.SRPR.v2-3-8.r1')
Map tiles and data from OpenStreetMap, under the ODbL.
Basic information#
| Parameter | Value |
|---|---|
| Bounding box longitude (°) | -180.0 to 180.0 |
| Bounding box latitude (°) | -90.0 to 90.0 |
| Time range | 2009-03-31 to 2015-12-30 |
Click here for full dataset metadata.
Variable list#
Click on a variable name to jump to the variable’s full metadata.
| Variable | Long name | Units |
|---|---|---|
| solar_zenith_angle | Solar zenith angle | degrees |
| sensor_zenith_angle | Sensor zenith angle | degrees |
| pressure_levels | pressure levels | hPa |
| pressure_weight | pressure weight | 1 |
| xch4 | column-average dry-air mole fraction of atmospheric methane | 1e-9 |
| xch4_uncertainty | 1-sigma uncertainty of the retrieved column-average dry-air mole fraction of atmospheric methane | 1e-9 |
| xch4_averaging_kernel | normalized column averaging kernel | 1 |
| ch4_profile_apriori | a priori dry-air mole fraction profile of atmospheric methane | 1e-9 |
| xch4_quality_flag | xch4_quality flag | 1 |
| flag_landtype | flag for land / ocean soundings | 1 |
| flag_sunglint | flag for normal / sunglint soundings | 1 |
| gain | gain | 1 |
| exposure_id | exposure id | 1 |
| signal_to_noise_window | signal to noise ratio | 1 |
| dry_airmass_layer | Dry airmass per layer | m-2 |
| altitude | Altitude | m |
| air_temperature | Air temperature at each level | K |
| surface_altitude_stdv | Standard deviation of the surface elevation | m |
| x_wind | grid_eastward_wind | m s-1 |
| y_wind | grid_northward_wind | m s-1 |
| chi2 | Chi-squared | 1 |
| optical_thickness_of_atmosphere_layer_due_to_ambient_aerosol | Aerosol optical thickness per retrieval window | 1 |
| raw_xch4 | Raw retrieved XCH4 column | 1e-9 |
| raw_xch4_err | Raw uncertainty on the XCH4 total column | 1e-9 |
| raw_xco2 | Raw retrieved XCO2 column | 1e-6 |
| raw_xco2_err | Raw uncertainty on the XCO2 total column | 1e-6 |
| xco2_apriori | Apriori XCO2 total column | 1e-6 |
| xco2_averaging_kernel | normalized column averaging kernel | 1 |
| co2_profile_apriori | a priori dry-air mole fraction profile of atmospheric carbondioxide | 1e-6 |
| h2o_column_1593 | H2O total column at 1593 nm | m-2 |
| h2o_column_1629 | H2O total column at 1629 nm | m-2 |
| h2o_column_2042 | H2O total column at 2042 nm | m-2 |
| intensity_offset_o2a | Intensity offset in the O2A-band | W cm-2 |
| surface_albedo_758 | Surface albedo at 758 nm | 1 |
| surface_albedo_1593 | Surface albedo at 1593 nm | 1 |
| surface_albedo_1629 | Surface albedo at 1629 nm | 1 |
| surface_albedo_2042 | Surface albedo at 2042 nm | 1 |
Full variable metadata#
solar_zenith_angle#
| Field | Value |
|---|---|
| comment | Solar zenith angle is the angle between the line of sight to the sun and the local vertical |
| units | degrees |
| long_name | Solar zenith angle |
| standard_name | solar_zenith_angle |
| orig_data_type | float32 |
| fill_value | None |
| size | 954 |
| shape | 954 |
| chunk_sizes | 954 |
| file_chunk_sizes | 954 |
| data_type | float32 |
| dimensions | sounding_dim |
| file_dimensions | sounding_dim |
sensor_zenith_angle#
| Field | Value |
|---|---|
| comment | Sensor zenith angle is the angle between the line of sight to the sensor and the local vertical |
| units | degrees |
| long_name | Sensor zenith angle |
| standard_name | sensor_zenith_angle |
| orig_data_type | float32 |
| fill_value | None |
| size | 954 |
| shape | 954 |
| chunk_sizes | 954 |
| file_chunk_sizes | 954 |
| data_type | float32 |
| dimensions | sounding_dim |
| file_dimensions | sounding_dim |
pressure_levels#
| Field | Value |
|---|---|
| comment | Pressure levels define the boundaries of the averaging kernel and mole fraction profile layers. Surface pressure is represented by the 1st element, i.e., profiles are ordered from surface to top of atmosphere. |
| units | hPa |
| long_name | pressure levels |
| orig_data_type | float32 |
| fill_value | None |
| size | 4770 |
| shape | 954, 5 |
| chunk_sizes | 954, 5 |
| file_chunk_sizes | 954, 5 |
| data_type | float32 |
| dimensions | sounding_dim, level_dim |
| file_dimensions | sounding_dim, level_dim |
pressure_weight#
| Field | Value |
|---|---|
| long_name | pressure weight |
| units | 1 |
| comment | Pressure weights are the layer dependent weights needed to apply the averaging kernels. |
| orig_data_type | float32 |
| fill_value | None |
| size | 3816 |
| shape | 954, 4 |
| chunk_sizes | 954, 4 |
| file_chunk_sizes | 954, 4 |
| data_type | float32 |
| dimensions | sounding_dim, layer_dim |
| file_dimensions | sounding_dim, layer_dim |
xch4#
| Field | Value |
|---|---|
| long_name | column-average dry-air mole fraction of atmospheric methane |
| standard_name | dry_atmosphere_mole_fraction_of_methane |
| units | 1e-9 |
| comment | Retrieved column-average dry-air mole fraction of atmospheric methane (XCH4) in ppb |
| orig_data_type | float32 |
| fill_value | None |
| size | 954 |
| shape | 954 |
| chunk_sizes | 954 |
| file_chunk_sizes | 954 |
| data_type | float32 |
| dimensions | sounding_dim |
| file_dimensions | sounding_dim |
xch4_uncertainty#
| Field | Value |
|---|---|
| long_name | 1-sigma uncertainty of the retrieved column-average dry-air mole fraction of atmospheric methane |
| units | 1e-9 |
| comment | 1-sigma uncertainty of the retrieved column-average dry-air mole fraction of atmospheric methane (XCH4) in ppb |
| orig_data_type | float32 |
| fill_value | None |
| size | 954 |
| shape | 954 |
| chunk_sizes | 954 |
| file_chunk_sizes | 954 |
| data_type | float32 |
| dimensions | sounding_dim |
| file_dimensions | sounding_dim |
xch4_averaging_kernel#
| Field | Value |
|---|---|
| long_name | normalized column averaging kernel |
| units | 1 |
| comment | The normalized column-averaging kernel represents the sensitivity of the retrieved XCH4 to the atmospheric methane mole fraction depending on pressure (height). All values represent layer averages within the corresponding pressure levels. Values near one are ideal and indicate that the influence of the a priori is minimal. Profiles are ordered from surface to top of atmosphere. |
| orig_data_type | float32 |
| fill_value | None |
| size | 3816 |
| shape | 954, 4 |
| chunk_sizes | 954, 4 |
| file_chunk_sizes | 954, 4 |
| data_type | float32 |
| dimensions | sounding_dim, layer_dim |
| file_dimensions | sounding_dim, layer_dim |
ch4_profile_apriori#
| Field | Value |
|---|---|
| long_name | a priori dry-air mole fraction profile of atmospheric methane |
| units | 1e-9 |
| comment | A priori dry-air mole fraction profile of atmospheric methane in ppb (http://www.atmos-meas-tech.net/5/1349/2012/amt-5-1349-2012.html). All values represent layer averages within the corresponding pressure levels. Profiles are ordered from surface to top of atmosphere. |
| orig_data_type | float32 |
| fill_value | None |
| size | 3816 |
| shape | 954, 4 |
| chunk_sizes | 954, 4 |
| file_chunk_sizes | 954, 4 |
| data_type | float32 |
| dimensions | sounding_dim, layer_dim |
| file_dimensions | sounding_dim, layer_dim |
xch4_quality_flag#
| Field | Value |
|---|---|
| values | 0B, 1B; // byte |
| units | 1 |
| meanings | Quality flag for XCH4 retrieval |
| comment | 0=good, 1=bad |
| long_name | xch4_quality flag |
| orig_data_type | int32 |
| fill_value | 9223372036854775807 |
| size | 954 |
| shape | 954 |
| chunk_sizes | 954 |
| file_chunk_sizes | 954 |
| data_type | int64 |
| dimensions | sounding_dim |
| file_dimensions | sounding_dim |
flag_landtype#
| Field | Value |
|---|---|
| long_name | flag for land / ocean soundings |
| units | 1 |
| comments | 0 = land, 1 = ocean |
| orig_data_type | int32 |
| fill_value | 9223372036854775807 |
| size | 954 |
| shape | 954 |
| chunk_sizes | 954 |
| file_chunk_sizes | 954 |
| data_type | int64 |
| dimensions | sounding_dim |
| file_dimensions | sounding_dim |
flag_sunglint#
| Field | Value |
|---|---|
| long_name | flag for normal / sunglint soundings |
| units | 1 |
| comments | 0 = no glint, 1 = glint |
| orig_data_type | int32 |
| fill_value | 9223372036854775807 |
| size | 954 |
| shape | 954 |
| chunk_sizes | 954 |
| file_chunk_sizes | 954 |
| data_type | int64 |
| dimensions | sounding_dim |
| file_dimensions | sounding_dim |
gain#
| Field | Value |
|---|---|
| long_name | gain |
| units | 1 |
| comments | gain setting of the sensor, H = gain H, M = gain M |
| DODS | strlen: 954, dimName: sounding_dim |
| orig_data_type | bytes1024 |
| size | 1 |
| shape | 1 |
| chunk_sizes | 1 |
| file_chunk_sizes | 1 |
| data_type | bytes1024 |
| dimensions | |
| file_dimensions |
exposure_id#
| Field | Value |
|---|---|
| long_name | exposure id |
| units | 1 |
| comments | Exposure identification number of the sounding |
| orig_data_type | int32 |
| fill_value | 9223372036854775807 |
| size | 954 |
| shape | 954 |
| chunk_sizes | 954 |
| file_chunk_sizes | 954 |
| data_type | int64 |
| dimensions | sounding_dim |
| file_dimensions | sounding_dim |
signal_to_noise_window#
| Field | Value |
|---|---|
| long_name | signal to noise ratio |
| units | 1 |
| comments | The signal to noise ratio per retrieval window for both polarization directions. Window 1 ranges between 757 nm and 773 nm, Window 2 ranges between 1.59 um and 1.62 um, Window 3 ranges between 1.63 um and 1.65 um and Window 4 ranges between 2.04 um and 2.08 um |
| orig_data_type | float32 |
| fill_value | None |
| size | 7632 |
| shape | 954, 2, 4 |
| chunk_sizes | 954, 2, 4 |
| file_chunk_sizes | 954, 2, 4 |
| data_type | float32 |
| dimensions | sounding_dim, polarization_dim, window_dim |
| file_dimensions | sounding_dim, polarization_dim, window_dim |
dry_airmass_layer#
| Field | Value |
|---|---|
| long_name | Dry airmass per layer |
| units | m-2 |
| comments | The dry airmass per layer, units are molecules m-2 |
| orig_data_type | float32 |
| fill_value | None |
| size | 3816 |
| shape | 954, 4 |
| chunk_sizes | 954, 4 |
| file_chunk_sizes | 954, 4 |
| data_type | float32 |
| dimensions | sounding_dim, layer_dim |
| file_dimensions | sounding_dim, layer_dim |
altitude#
| Field | Value |
|---|---|
| standard_name | altitude |
| long_name | Altitude |
| units | m |
| comments | Altitude is the surface elevation in meters |
| orig_data_type | float32 |
| fill_value | None |
| size | 954 |
| shape | 954 |
| chunk_sizes | 954 |
| file_chunk_sizes | 954 |
| data_type | float32 |
| dimensions | sounding_dim |
| file_dimensions | sounding_dim |
air_temperature#
| Field | Value |
|---|---|
| standard_name | air_temperature |
| long_name | Air temperature at each level |
| units | K |
| comments | Air temperature is the bulk temperature of the air, not the surface (skin) temperature. |
| orig_data_type | float32 |
| fill_value | None |
| size | 4770 |
| shape | 954, 5 |
| chunk_sizes | 954, 5 |
| file_chunk_sizes | 954, 5 |
| data_type | float32 |
| dimensions | sounding_dim, level_dim |
| file_dimensions | sounding_dim, level_dim |
surface_altitude_stdv#
| Field | Value |
|---|---|
| long_name | Standard deviation of the surface elevation |
| units | m |
| comments | Standard deviation of the surface elevation within the area of the GOSAT sounding, as derived from the SRTM database |
| orig_data_type | float32 |
| fill_value | None |
| size | 954 |
| shape | 954 |
| chunk_sizes | 954 |
| file_chunk_sizes | 954 |
| data_type | float32 |
| dimensions | sounding_dim |
| file_dimensions | sounding_dim |
x_wind#
| Field | Value |
|---|---|
| standard_name | x_wind |
| long_name | grid_eastward_wind |
| units | m s-1 |
| comments | \"x\" indicates a vector component along the grid x-axis, positive with increasing x. Wind is defined as a two-dimensional (horizontal) air velocity vector, with no vertical component. (Vertical motion in the atmosphere has the standard name upward_air_velocity.) |
| orig_data_type | float32 |
| fill_value | None |
| size | 4770 |
| shape | 954, 5 |
| chunk_sizes | 954, 5 |
| file_chunk_sizes | 954, 5 |
| data_type | float32 |
| dimensions | sounding_dim, level_dim |
| file_dimensions | sounding_dim, level_dim |
y_wind#
| Field | Value |
|---|---|
| standard_name | y_wind |
| long_name | grid_northward_wind |
| units | m s-1 |
| comments | \"y\" indicates a vector component along the grid y-axis, positive with increasing y. Wind is defined as a two-dimensional (horizontal) air velocity vector, with no vertical component. (Vertical motion in the atmosphere has the standard name upward_air_velocity.) |
| orig_data_type | float32 |
| fill_value | None |
| size | 4770 |
| shape | 954, 5 |
| chunk_sizes | 954, 5 |
| file_chunk_sizes | 954, 5 |
| data_type | float32 |
| dimensions | sounding_dim, level_dim |
| file_dimensions | sounding_dim, level_dim |
chi2#
| Field | Value |
|---|---|
| units | 1 |
| comments | Chi_squared value of the sounding |
| long_name | Chi-squared |
| orig_data_type | float32 |
| fill_value | None |
| size | 954 |
| shape | 954 |
| chunk_sizes | 954 |
| file_chunk_sizes | 954 |
| data_type | float32 |
| dimensions | sounding_dim |
| file_dimensions | sounding_dim |
optical_thickness_of_atmosphere_layer_due_to_ambient_aerosol#
| Field | Value |
|---|---|
| standard_name | optical_thickness_of_atmosphere_layer_due_to_ambient_aerosol |
| long_name | Aerosol optical thickness per retrieval window |
| units | 1 |
| comments | \"Layer\" means any layer with upper and lower boundaries that have constant values in some vertical coordinate. There must be a vertical coordinate variable indicating the extent of the layer(s). If the layers are model layers, the vertical coordinate can be model_level_number, but it is recommended to specify a physical coordinate (in a scalar or auxiliary coordinate variable) as well. The optical thickness is the integral along the path of radiation of a volume scattering/absorption/attenuation coefficient. The radiative flux is reduced by a factor exp(-optical_thickness) on traversing the path. A coordinate variable of radiation_wavelength or radiation_frequency can be specified to indicate that the optical thickness applies at specific wavelengths or frequencies. \"Aerosol\" means the suspended liquid or solid particles in air (except cloud droplets). \"Ambient aerosol\" is aerosol that has taken up ambient water through hygroscopic growth. The extent of hygroscopic growth depends on the relative humidity and the composition of the aerosol. The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. Window 1 ranges between 757 nm and 773 nm, window 2 ranges from 1.59 um and 1.62 um, window 3 ranges between 1.63 um and 1.65 um and window 4 ranges between 2.04 um and 2.08 um |
| orig_data_type | float32 |
| fill_value | None |
| size | 3816 |
| shape | 954, 4 |
| chunk_sizes | 954, 4 |
| file_chunk_sizes | 954, 4 |
| data_type | float32 |
| dimensions | sounding_dim, window_dim |
| file_dimensions | sounding_dim, window_dim |
raw_xch4#
| Field | Value |
|---|---|
| long_name | Raw retrieved XCH4 column |
| units | 1e-9 |
| comments | The retrieved raw XCH4 total column |
| orig_data_type | float32 |
| fill_value | None |
| size | 954 |
| shape | 954 |
| chunk_sizes | 954 |
| file_chunk_sizes | 954 |
| data_type | float32 |
| dimensions | sounding_dim |
| file_dimensions | sounding_dim |
raw_xch4_err#
| Field | Value |
|---|---|
| long_name | Raw uncertainty on the XCH4 total column |
| units | 1e-9 |
| comments | The raw uncertainty due to measurement noise on the XCH4 total column |
| orig_data_type | float32 |
| fill_value | None |
| size | 954 |
| shape | 954 |
| chunk_sizes | 954 |
| file_chunk_sizes | 954 |
| data_type | float32 |
| dimensions | sounding_dim |
| file_dimensions | sounding_dim |
raw_xco2#
| Field | Value |
|---|---|
| long_name | Raw retrieved XCO2 column |
| units | 1e-6 |
| comments | The retrieved raw XCO2 total column |
| orig_data_type | float32 |
| fill_value | None |
| size | 954 |
| shape | 954 |
| chunk_sizes | 954 |
| file_chunk_sizes | 954 |
| data_type | float32 |
| dimensions | sounding_dim |
| file_dimensions | sounding_dim |
raw_xco2_err#
| Field | Value |
|---|---|
| long_name | Raw uncertainty on the XCO2 total column |
| units | 1e-6 |
| comments | The raw uncertainty due to measurement noise on the XCO2 total column |
| orig_data_type | float32 |
| fill_value | None |
| size | 954 |
| shape | 954 |
| chunk_sizes | 954 |
| file_chunk_sizes | 954 |
| data_type | float32 |
| dimensions | sounding_dim |
| file_dimensions | sounding_dim |
xco2_apriori#
| Field | Value |
|---|---|
| long_name | Apriori XCO2 total column |
| units | 1e-6 |
| comments | The apriori XCO2 total column |
| orig_data_type | float32 |
| fill_value | None |
| size | 954 |
| shape | 954 |
| chunk_sizes | 954 |
| file_chunk_sizes | 954 |
| data_type | float32 |
| dimensions | sounding_dim |
| file_dimensions | sounding_dim |
xco2_averaging_kernel#
| Field | Value |
|---|---|
| long_name | normalized column averaging kernel |
| units | 1 |
| comment | The normalized column-averaging kernel represents the sensitivity of the retrieved XCO2 to the atmospheric carbondioxide mole fraction depending on pressure (height). All values represent layer averages within the corresponding pressure levels. Values near one are ideal and indicate that the influence of the a priori is minimal. Profiles are ordered from surface to top of atmosphere. |
| orig_data_type | float32 |
| fill_value | None |
| size | 3816 |
| shape | 954, 4 |
| chunk_sizes | 954, 4 |
| file_chunk_sizes | 954, 4 |
| data_type | float32 |
| dimensions | sounding_dim, layer_dim |
| file_dimensions | sounding_dim, layer_dim |
co2_profile_apriori#
| Field | Value |
|---|---|
| long_name | a priori dry-air mole fraction profile of atmospheric carbondioxide |
| units | 1e-6 |
| comment | A priori dry-air mole fraction profile of atmospheric carbondioxide in ppm (http://www.atmos-meas-tech.net/5/1349/2012/amt-5-1349-2012.html). All values represent layer averages within the corresponding pressure levels. Profiles are ordered from surface to top of atmosphere. |
| orig_data_type | float32 |
| fill_value | None |
| size | 3816 |
| shape | 954, 4 |
| chunk_sizes | 954, 4 |
| file_chunk_sizes | 954, 4 |
| data_type | float32 |
| dimensions | sounding_dim, layer_dim |
| file_dimensions | sounding_dim, layer_dim |
h2o_column_1593#
| Field | Value |
|---|---|
| long_name | H2O total column at 1593 nm |
| units | m-2 |
| comments | The retrieved H2O total column in units of molecules m-2 at 1593 nm |
| orig_data_type | float32 |
| fill_value | None |
| size | 954 |
| shape | 954 |
| chunk_sizes | 954 |
| file_chunk_sizes | 954 |
| data_type | float32 |
| dimensions | sounding_dim |
| file_dimensions | sounding_dim |
h2o_column_1629#
| Field | Value |
|---|---|
| long_name | H2O total column at 1629 nm |
| units | m-2 |
| comments | The retrieved H2O total column in units of molecules m-2 at 1629 nm |
| orig_data_type | float32 |
| fill_value | None |
| size | 954 |
| shape | 954 |
| chunk_sizes | 954 |
| file_chunk_sizes | 954 |
| data_type | float32 |
| dimensions | sounding_dim |
| file_dimensions | sounding_dim |
h2o_column_2042#
| Field | Value |
|---|---|
| long_name | H2O total column at 2042 nm |
| units | m-2 |
| comments | The retrieved H2O total column in units of molecules m-2 at 2042 nm |
| orig_data_type | float32 |
| fill_value | None |
| size | 954 |
| shape | 954 |
| chunk_sizes | 954 |
| file_chunk_sizes | 954 |
| data_type | float32 |
| dimensions | sounding_dim |
| file_dimensions | sounding_dim |
intensity_offset_o2a#
| Field | Value |
|---|---|
| long_name | Intensity offset in the O2A-band |
| units | W cm-2 |
| comments | The retrieved intensity offset in the O2A-band |
| orig_data_type | float32 |
| fill_value | None |
| size | 954 |
| shape | 954 |
| chunk_sizes | 954 |
| file_chunk_sizes | 954 |
| data_type | float32 |
| dimensions | sounding_dim |
| file_dimensions | sounding_dim |
surface_albedo_758#
| Field | Value |
|---|---|
| long_name | Surface albedo at 758 nm |
| units | 1 |
| comments | The retrieved surface albedo for window 1, at 758 nm |
| orig_data_type | float32 |
| fill_value | None |
| size | 954 |
| shape | 954 |
| chunk_sizes | 954 |
| file_chunk_sizes | 954 |
| data_type | float32 |
| dimensions | sounding_dim |
| file_dimensions | sounding_dim |
surface_albedo_1593#
| Field | Value |
|---|---|
| long_name | Surface albedo at 1593 nm |
| units | 1 |
| comments | The retrieved surface albedo for window 2, at 1593 nm |
| orig_data_type | float32 |
| fill_value | None |
| size | 954 |
| shape | 954 |
| chunk_sizes | 954 |
| file_chunk_sizes | 954 |
| data_type | float32 |
| dimensions | sounding_dim |
| file_dimensions | sounding_dim |
surface_albedo_1629#
| Field | Value |
|---|---|
| long_name | Surface albedo at 1629 nm |
| units | 1 |
| comments | The retrieved surface albedo for window 3, at 1629 nm |
| orig_data_type | float32 |
| fill_value | None |
| size | 954 |
| shape | 954 |
| chunk_sizes | 954 |
| file_chunk_sizes | 954 |
| data_type | float32 |
| dimensions | sounding_dim |
| file_dimensions | sounding_dim |
surface_albedo_2042#
| Field | Value |
|---|---|
| long_name | Surface albedo at 2042 nm |
| units | 1 |
| comments | The retrieved surface albedo for window 4 at 2042 nm |
| orig_data_type | float32 |
| fill_value | None |
| size | 954 |
| shape | 954 |
| chunk_sizes | 954 |
| file_chunk_sizes | 954 |
| data_type | float32 |
| dimensions | sounding_dim |
| file_dimensions | sounding_dim |
Full dataset metadata#
| Field | Value |
|---|---|
| title | ESA Greenhouse Gases Climate Change Initiative (GHG_cci): Column-averaged CH4 from GOSAT generated with the SRPR (RemoTeC) Proxy Retrieval algorithm (CH4_GOS_SRPR), version 2.3.8 |
| source | GOSAT L1B version v201 |
| history | 30.08.2016 - product generated with RemoTeC v2.3.8 |
| references | http://www.esa-ghg-cii.org/ http://onlinelibrary.wiley.com/doi/10.1002/jgrd.50332/abstract http://onlinelibrary.wiley.com/doi/10.1029/2011GL047888/abstract |
| product_version | v2-3-8 |
| comment | These data were produced at SRON Netherlands Institute for Space Research in the frame of the ESA GHG CCI project |
| project | Climate Change Initiative - European Space Agency |
| ecv | GHG |
| institute | Netherlands Institute for Space Research |
| processing_level | L2 |
| product_string | SRPR |
| data_type | CH4 |
| sensor_id | TANSO-FTS |
| platform_id | GOSAT |
| abstract | The CH4_GOS_SRPR dataset is comprised of Level 2, 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 (TANSO-FTS) NIR and SWIR spectra, onboard the Japanese Greenhouse gases Observing Satellite (GOSAT), using the RemoTeC SRPR Proxy Retrieval algorithm. It has been generated as part of the European Space Agency (ESA) Greenhouse Gases Climate Change Initiative (GHG_cci) project. This version of the data is version 2.3.8, and forms part of the Climate Research Data Package 4. This Proxy Retrieval product has been generated using the RemoTeC SRPR algorithm, which is being jointly developed at SRON and KIT. This has been designated as an 'alternative' GHG CCI algorithm, and a separate product has also been generated by applying the baseline GHG CCI proxy algorithm (the University of Leicester OCPR algorithm). It is advised that users who aren't sure whether to use the baseline or alternative product use the OCPR product generated with the baseline algorithm. For more information regarding the differences between the baseline and alternative algorithms please see the GHG-CCI data products webpage. The data product is stored per day in a single NetCDF file. Retrieval results are provided for the individual GOSAT spatial footprints, no averaging having been applied. As well as containing the key product, the product file contains information relevant for the use of the data, such as the vertical layering and averaging kernels. The parameters which are retrieved simultaneously with XCH4 are also included (e.g. surface albedo), in addition to retrieval diagnostics like quality of the fit and retrieval errors. For further details on the product, including the RemoTeC algorithm and the TANSO-FTS instrument, please see the associated product user guide (PUG) or the Algorithm Theoretical Basis Documents. |
| publication_date | 2018-03-19T21:41:05 |
| uuid | 96d5b75ea29946c5aab8214ddbab252b |
| catalog_url | https://catalogue.ceda.ac.uk/uuid/96d5b75ea29946c5aab8214ddbab252b |
| cci_project | GHG |