OPeNDAP Data Access Form for oco2_LtCO2_190227_B9003r_190504002539s.nc4
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dataset: oco2_LtCO2_190227_B9003r_190504002539s.nc4




  • HDF5_GLOBAL
    • identifier_product_doi: 10.5067/W8QGIYNKS3JC
    • identifier_product_doi_authority: http://dx.doi.org/
    • filter_function: oco2_xco2_quality_flag_b9
    • bc_function: oco2_bias_correct_b9
    • warn_level_function: oco2_warn_levels_b8
    • Bias_Correction_land: XCO2_Bias_Corrected = (XCO2_Raw + 0.900*(dpfrac + 0.0) + 0.0290*(co2_grad_del - 15.0) + 9.00*(DWS + 0.0) - footprint_bias)/0.99540
    • Bias_Correction_oceanGL: XCO2_Bias_Corrected = (XCO2_Raw + 0.245*(dp_sco2 + 0.0) - 0.0900*((co2_grad_del<(-6.)) + 6.00) - footprint_bias)/0.99530
    • Footprint_bias_land: Assumed footprint biases in xco2 [ppm] for footprints 1-8: -0.36, -0.15, -0.16, -0.14, 0.02, 0.33, 0.13, 0.34
    • Footprint_bias_oceanGL: Assumed footprint biases in xco2 [ppm] for footprints 1-8: -0.36, -0.15, -0.16, -0.14, 0.02, 0.33, 0.13, 0.34
    • Bias_Uncertainty: Bias correction parameter uncertainties are given in the data users guide.
    • Note_regarding_bias_correction: There is some uncertainty in not only the bias correction coefficients but in the chosen parameters themselves. This release bias correction may be slightly different that of previous releases, and also somewhat different from those of previous ACOS algorithm versions. This has to do with details of the particular retrieval algorithm version and is considered normal (though not ideal).
    • Platform: OCO-2
    • Sensor: OCO-2
    • title: ACOS L2 Lite Output
    • BuildId: B8.1.02
    • filtering_state: Filtered with oco2_lite_file_prefilter_b8a
    • creation_date: May 2019
    • contact: Chris O'Dell: odell@atmos.colostate.edu
  • Preprocessors:
  • Meteorology:
  • Auxiliary:
  • Retrieval:
  • Sounding:


  • xco2_apriori[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: ppm
      • long_name: A priori XCO2 Value
      • missing_value: -999999.0000
      • origname: xco2_apriori
      • fullnamepath: /xco2_apriori
    file_index[ sounding_id= 0 ..204987] (Type is Byte)
    • attributes
      • units: none
      • long_name: L2 File Index
      • missing_value: -1
      • comment: 1-Based Index of L2 File for each sounding
      • origname: file_index
      • fullnamepath: /file_index
    pressure_levels[ sounding_id= 0 ..204987] [ levels= 0 ..19] (Type is Float32)
    • attributes
      • units: hPa
      • long_name: Pressure_Levels
      • missing_value: -999999.0000
      • comment: Pressure at each level; Defined on layer boundaries. These are oriented space-to-surface, so the first element defines the TOA, the last element defines the surface.
      • origname: pressure_levels
      • fullnamepath: /pressure_levels
    xco2[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: ppm
      • long_name: XCO2
      • missing_value: -999999.0000
      • comment: Column-averaged dry-air mole fraction of CO2 (includes bias correction)
      • origname: xco2
      • fullnamepath: /xco2
    time[ sounding_id= 0 ..204987] (Type is Float64)
    • attributes
      • units: seconds since 1970-01-01 00:00:00
      • long_name: time
      • missing_value: -999999.00000000000
      • origname: time
      • fullnamepath: /time
    pressure_weight[ sounding_id= 0 ..204987] [ levels= 0 ..19] (Type is Float32)
    • attributes
      • units: none
      • long_name: Pressure Weighting Function
      • missing_value: -999999.0000
      • comment: Pressure weighting function for each level; Defined on layer boundaries. These are oriented space-to-surface, so the first element defines the TOA, the last element defines the surface.
      • origname: pressure_weight
      • fullnamepath: /pressure_weight
    Preprocessors_co2_ratio[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: dimensionless
      • long_name: CO2 Ratio
      • missing_value: -999999.0000
      • comment: Bias- and Footprint-corrected Band 3 / Band 2 Ratio of retrieved Single-band XCO2 using IMAP-DOAS algorithm
      • origname: co2_ratio
      • fullnamepath: /Preprocessors/co2_ratio
    Preprocessors_max_declocking_sco2[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: none
      • long_name: max_declocking_sco2
      • missing_value: -999999.0000
      • comment: ABS(MaxDeclockingFactor_StrongCO2_Band - 1)*100
      • origname: max_declocking_sco2
      • fullnamepath: /Preprocessors/max_declocking_sco2
    Preprocessors_max_declocking_o2a[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: none
      • long_name: max_declocking_o2a
      • missing_value: -999999.0000
      • comment: ABS(MaxDeclockingFactor_O2A_Band - 1)*100
      • origname: max_declocking_o2a
      • fullnamepath: /Preprocessors/max_declocking_o2a
    Preprocessors_xco2_strong_idp[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: ppm
      • long_name: xco2_strong
      • missing_value: -999999.0000
      • comment: XCO2 from Strong CO2 Band only, IMAP-DOAS algorithm
      • origname: xco2_strong_idp
      • fullnamepath: /Preprocessors/xco2_strong_idp
    Preprocessors_max_declocking_wco2[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: none
      • long_name: max_declocking_wco2
      • missing_value: -999999.0000
      • comment: ABS(MaxDeclockingFactor_WeakCO2_Band - 1)*100
      • origname: max_declocking_wco2
      • fullnamepath: /Preprocessors/max_declocking_wco2
    Preprocessors_dp_abp[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: hPa
      • long_name: delta_surface_pressure_abp
      • missing_value: -999999.0000
      • comment: Retrieved-Prior Pressure from the fast O2A-band only preprocessor retrieval
      • origname: dp_abp
      • fullnamepath: /Preprocessors/dp_abp
    Preprocessors_co2_ratio_offset_per_footprint[ footprints= 0 ..7] (Type is Float32)
    • attributes
      • units: dimensionless
      • long_name: co2_ratio_offset_per_footprint
      • missing_value: -999999.0000
      • comment: Per footprint offset subtracted from co2_ratio in the L2Std files to form co2_ratio in the lite files
      • origname: co2_ratio_offset_per_footprint
      • fullnamepath: /Preprocessors/co2_ratio_offset_per_footprint
    Preprocessors_h2o_ratio[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: dimensionless
      • long_name: H2O Ratio
      • missing_value: -999999.0000
      • comment: Footprint-corrected Band 3 / Band 2 Ratio of retrieved Single-band XH2O using IMAP-DOAS algorithm
      • origname: h2o_ratio
      • fullnamepath: /Preprocessors/h2o_ratio
    Preprocessors_xco2_weak_idp[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: ppm
      • long_name: xco2_weak
      • missing_value: -999999.0000
      • comment: XCO2 from Weak CO2 Band only, IMAP-DOAS algorithm
      • origname: xco2_weak_idp
      • fullnamepath: /Preprocessors/xco2_weak_idp
    Preprocessors_h2o_ratio_offset_per_footprint[ footprints= 0 ..7] (Type is Float32)
    • attributes
      • units: dimensionless
      • long_name: h2o_ratio_offset_per_footprint
      • missing_value: -999999.0000
      • comment: Per footprint offset subtracted from h2o_ratio in the L2Std files to form co2_ratio in the lite files
      • origname: h2o_ratio_offset_per_footprint
      • fullnamepath: /Preprocessors/h2o_ratio_offset_per_footprint
    solar_zenith_angle[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: degrees
      • long_name: sounding_solar_zenith
      • missing_value: -999999.0000
      • comment: solar zenith angle at the time of the measurement
      • origname: solar_zenith_angle
      • fullnamepath: /solar_zenith_angle
    longitude[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: degrees_east
      • long_name: longitude
      • missing_value: -999999.0000
      • comment: center longitude of the measurement
      • origname: longitude
      • fullnamepath: /longitude
    xco2_qf_bitflag[ sounding_id= 0 ..204987] (Type is Int32)
    • attributes
      • units: none
      • long_name: B9 xco2_quality_flag bitflag
      • missing_value: -9999
      • comment: B9 xco2_quality_flag bit flag
      • qf_variables: defined_mode, eof3_3_rel, max_declocking_wco2, max_declocking_sco2, albedo_slope_sco2, rms_rel_wco2, h2o_ratio, co2_ratio, dp_o2a, dp_sco2, co2_grad_del, windspeed, dp_abp, aod_ice, xco2_uncertainty, chi2_wco2, albedo_slope_wco2, surface_type_flipped, altitude_stddev, aod_total, dws, albedo_sco2, rms_rel_sco2, aod_water, ice_height, aod_strataer, aod_oc, aod_seasalt
      • origname: xco2_qf_bitflag
      • fullnamepath: /xco2_qf_bitflag
    latitude[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: degrees_north
      • long_name: latitude
      • missing_value: -999999.0000
      • comment: center latitude of the measurement
      • origname: latitude
      • fullnamepath: /latitude
    sensor_zenith_angle[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: degrees
      • long_name: sounding_zenith
      • missing_value: -999999.0000
      • comment: zenith angle of the satellite at the time of the measurement
      • origname: sensor_zenith_angle
      • fullnamepath: /sensor_zenith_angle
    Meteorology_psurf_apriori_o2a[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: hPa
      • long_name: B9 Band 1 Prior Surface Pressure
      • missing_value: -999999.0000
      • comment: Prior surface pressure for Band 1 location, as determined by GEOS5-FP-IT short-term (0-9 hour) forecast
      • origname: psurf_apriori_o2a
      • fullnamepath: /Meteorology/psurf_apriori_o2a
    Meteorology_psurf_apriori_wco2[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: hPa
      • long_name: B9 Band 2 Prior Surface Pressure
      • missing_value: -999999.0000
      • comment: Prior surface pressure for Band 2 location, as determined by GEOS5-FP-IT short-term (0-9 hour) forecast
      • origname: psurf_apriori_wco2
      • fullnamepath: /Meteorology/psurf_apriori_wco2
    Meteorology_psurf_apriori_sco2[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: hPa
      • long_name: B9 Band 3 Prior Surface Pressure
      • missing_value: -999999.0000
      • comment: Prior surface pressure for Band 3 location, as determined by GEOS5-FP-IT short-term (0-9 hour) forecast
      • origname: psurf_apriori_sco2
      • fullnamepath: /Meteorology/psurf_apriori_sco2
    Meteorology_windspeed_u_met[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: m/s
      • long_name: B9 Meteorology Surface Wind Speed, U Component
      • missing_value: -999999.0000
      • comment: Taken from the B9 meteorology
      • origname: windspeed_u_met
      • fullnamepath: /Meteorology/windspeed_u_met
    Meteorology_psurf_apriori[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: hPa
      • long_name: B9 Prior Surface Pressure
      • missing_value: -999999.0000
      • comment: Prior surface pressure for sounding location, as determined by GEOS5-FP-IT short-term (0-9 hour) forecast
      • origname: psurf_apriori
      • fullnamepath: /Meteorology/psurf_apriori
    Meteorology_windspeed_v_met[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: m/s
      • long_name: B9 Meteorology Surface Wind Speed, V Component
      • missing_value: -999999.0000
      • comment: Taken from the B9 meteorology
      • origname: windspeed_v_met
      • fullnamepath: /Meteorology/windspeed_v_met
    xco2_quality_flag[ sounding_id= 0 ..204987] (Type is Int16)
    • attributes
      • units: none
      • long_name: XCO2_Quality_Flag
      • missing_value: 127
      • comment: 0=Good, 1=Bad
      • origname: xco2_quality_flag
      • fullnamepath: /xco2_quality_flag
    xco2_averaging_kernel[ sounding_id= 0 ..204987] [ levels= 0 ..19] (Type is Float32)
    • attributes
      • units: none
      • long_name: XCO2 Column Averaging Kernel
      • missing_value: -999999.0000
      • comment: Normalized XCO2 averaging kernel; Defined on layer boundaries. These are oriented space-to-surface, so the first element defines the TOA, the last element defines the surface.
      • origname: xco2_averaging_kernel
      • fullnamepath: /xco2_averaging_kernel
    Auxiliary_xco2_quality_flag_b8[ sounding_id= 0 ..204987] (Type is Int16)
    • attributes
      • units: none
      • long_name: XCO2_Quality_Flag_B8
      • missing_value: 127
      • comment: Version B8 QF: 0=Good, 1=Bad
      • origname: xco2_quality_flag_b8
      • fullnamepath: /Auxiliary/xco2_quality_flag_b8
    Auxiliary_surface_type_flipped[ sounding_id= 0 ..204987] (Type is Int16)
    • attributes
      • units: none
      • long_name: surface_type_flipped
      • missing_value: 127
      • comment: Set to 1 if the surface type used by L2 was incorrect (land vs. water or vice-versa)
      • origname: surface_type_flipped
      • fullnamepath: /Auxiliary/surface_type_flipped
    date[ sounding_id= 0 ..204987] [ epoch_dimension= 0 ..6] (Type is Int16)
    • attributes
      • units: none
      • long_name: Observation date and time matching sounding_id
      • missing_value: -9999
      • comment: Year, month (1-12), day (1-31), hour (0-23), minute (0-59), second (0-59), millisecond (0,300,or 700). Note this time is chosen to correspond exactly to the first 15 digits of sounding_id
      • origname: date
      • fullnamepath: /date
    Retrieval_dp_o2a[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: hPa
      • long_name: Delta Psurf from L2, O2A-band Prior
      • missing_value: -999999.0000
      • comment: Retrieved Psurf from the L2 Full-Physics retrieval, minus the O2A-band prior Psurf
      • origname: dp_o2a
      • fullnamepath: /Retrieval/dp_o2a
    Retrieval_aod_water[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: dimensionless
      • long_name: Water Cloud Optical Depth
      • missing_value: -999999.0000
      • comment: Retrieved Water Cloud Optical Depth at 0.755 microns
      • origname: aod_water
      • fullnamepath: /Retrieval/aod_water
    Retrieval_s32[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: none
      • long_name: Signal_band3/Signal_band2
      • missing_value: -999999.0000
      • comment: Ratio of Band 3 to Band 2 signal level
      • origname: s32
      • fullnamepath: /Retrieval/s32
    Retrieval_chi2_sco2[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: dimensionless
      • long_name: Band 3 Reduced Chi-Squared of L2 Fit
      • missing_value: -999999.0000
      • comment: Reduced Chi-Squared for Band 3 (Strong CO2 band) of L2 spectral fit
      • origname: chi2_sco2
      • fullnamepath: /Retrieval/chi2_sco2
    Retrieval_aod_dust[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: dimensionless
      • long_name: Dust Aerosol Optical Depth
      • missing_value: -999999.0000
      • comment: Retrieved Dust Aerosol Optical Depth at 0.755 microns
      • origname: aod_dust
      • fullnamepath: /Retrieval/aod_dust
    Retrieval_albedo_slope_wco2[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: per wn
      • long_name: Retrieved Band 2 reflectance slope (land), or slope of lambertian albedo component of BRDF (ocean)
      • missing_value: -999999.0000
      • origname: albedo_slope_wco2
      • fullnamepath: /Retrieval/albedo_slope_wco2
    Retrieval_aod_bc[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: dimensionless
      • long_name: Black Carbon Optical Depth
      • missing_value: -999999.0000
      • comment: Retrieved Black Carbon Optical Depth at 0.755 microns
      • origname: aod_bc
      • fullnamepath: /Retrieval/aod_bc
    Retrieval_aod_strataer[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: dimensionless
      • long_name: Stratospheric Aerosol Optical Depth
      • missing_value: -999999.0000
      • comment: Retrieved Upper Trop+Stratospheric Aerosol Optical Depth at 0.755 microns
      • origname: aod_strataer
      • fullnamepath: /Retrieval/aod_strataer
    Retrieval_land_brdf_weight_o2a[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: none
      • long_name: Band 1 BRDF Amplitude (land only)
      • missing_value: -999999.0000
      • comment: Retrieved Band 1 reflectance (land), or lambertian albedo component of BRDF (ocean)
      • origname: land_brdf_weight_o2a
      • fullnamepath: /Retrieval/land_brdf_weight_o2a
    Retrieval_aod_seasalt[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: dimensionless
      • long_name: Sea Salt Optical Depth
      • missing_value: -999999.0000
      • comment: Retrieved Sea Salt Carbon Optical Depth at 0.755 microns
      • origname: aod_seasalt
      • fullnamepath: /Retrieval/aod_seasalt
    Retrieval_windspeed_apriori[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: m/s
      • long_name: Prior Surface Wind Speed
      • missing_value: -999999.0000
      • comment: Surface wind speed retrieved by the Level-2 retrieval
      • origname: windspeed_apriori
      • fullnamepath: /Retrieval/windspeed_apriori
    Retrieval_land_brdf_weight_wco2[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: none
      • long_name: Band 2 BRDF Amplitude (land only)
      • missing_value: -999999.0000
      • comment: Retrieved Band 2 reflectance (land), or lambertian albedo component of BRDF (ocean)
      • origname: land_brdf_weight_wco2
      • fullnamepath: /Retrieval/land_brdf_weight_wco2
    Retrieval_albedo_slope_sco2[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: per wn
      • long_name: Retrieved Band 3 reflectance slope (land), or slope of lambertian albedo component of BRDF (ocean)
      • missing_value: -999999.0000
      • origname: albedo_slope_sco2
      • fullnamepath: /Retrieval/albedo_slope_sco2
    Retrieval_tcwv_apriori[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: kg/m^2
      • long_name: Total Column Water Vapor A Priori
      • missing_value: -999999.0000
      • comment: Prior TCWV (from GEOS5-FP-IT prior profile)
      • origname: tcwv_apriori
      • fullnamepath: /Retrieval/tcwv_apriori
    Retrieval_co2_grad_del[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: ppm
      • long_name: Change in CO2 vertical gradient (surface minus level 13), retrieved-apriori
      • missing_value: -999999.0000
      • comment: level 13 is at P/Psurf=0.631579
      • origname: co2_grad_del
      • fullnamepath: /Retrieval/co2_grad_del
    Retrieval_fs[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: W/m^2/um/sr
      • long_name: Retrieved Fluorescence at 757 nm
      • missing_value: -999999.0000
      • comment: Simultaneous Fluorescence retrieval (at 757 nm) by L2 code; note this is different than the dedicated retrieval using only solar lines
      • origname: fs
      • fullnamepath: /Retrieval/fs
    Retrieval_SigmaB[ levels= 0 ..19] (Type is Float32)
    • attributes
      • units: dimensionless
      • long_name: SigmaB_Coefficient
      • missing_value: -999999.0000
      • comment: Multiply Psurf by these values to get the pressure layer boundaries (= pressure levels)
      • origname: SigmaB
      • fullnamepath: /Retrieval/SigmaB
    Retrieval_albedo_wco2[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: none
      • long_name: Band 2 Albedo
      • missing_value: -999999.0000
      • comment: Retrieved Band 2 reflectance (land), or lambertian albedo component of BRDF (ocean)
      • origname: albedo_wco2
      • fullnamepath: /Retrieval/albedo_wco2
    Retrieval_tcwv[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: kg/m^2
      • long_name: Total Column Water Vapor
      • missing_value: -999999.0000
      • comment: Retrieved TCWV obtained by multiplying retrieved h2o_scale factor to prior TCWV
      • origname: tcwv
      • fullnamepath: /Retrieval/tcwv
    Retrieval_tcwv_uncertainty[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: kg/m^2
      • long_name: Total Column Water Vapor Uncertainty
      • missing_value: -999999.0000
      • comment: Retrieved TCWV Posterior Uncertainty
      • origname: tcwv_uncertainty
      • fullnamepath: /Retrieval/tcwv_uncertainty
    Retrieval_land_brdf_weight_sco2[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: none
      • long_name: Band 3 BRDF Amplitude (land only)
      • missing_value: -999999.0000
      • comment: Retrieved Band 3 reflectance (land), or lambertian albedo component of BRDF (ocean)
      • origname: land_brdf_weight_sco2
      • fullnamepath: /Retrieval/land_brdf_weight_sco2
    Retrieval_albedo_o2a[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: none
      • long_name: Band 1 Albedo
      • missing_value: -999999.0000
      • comment: Retrieved Band 1 reflectance (land), or lambertian albedo component of BRDF (ocean)
      • origname: albedo_o2a
      • fullnamepath: /Retrieval/albedo_o2a
    Retrieval_deltaT[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: Kelvin
      • long_name: Retrieved Offset to Prior Temperature Profile in Kelvin
      • missing_value: -999999.0000
      • origname: deltaT
      • fullnamepath: /Retrieval/deltaT
    Retrieval_h2o_scale[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: dimensionless
      • long_name: Retrieved scale factor to Prior Water Vapor Profile
      • missing_value: -999999.0000
      • origname: h2o_scale
      • fullnamepath: /Retrieval/h2o_scale
    Retrieval_dp_sco2[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: hPa
      • long_name: Delta Psurf from L2, SCO2-band Prior
      • missing_value: -999999.0000
      • comment: Retrieved Psurf from the L2 Full-Physics retrieval, minus the SCO2-band prior Psurf
      • origname: dp_sco2
      • fullnamepath: /Retrieval/dp_sco2
    Retrieval_windspeed[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: m/s
      • long_name: Retrieved Surface Wind Speed
      • missing_value: -999999.0000
      • comment: Surface wind speed retrieved by the Level-2 retrieval
      • origname: windspeed
      • fullnamepath: /Retrieval/windspeed
    Retrieval_dpfrac[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: ppm
      • long_name: dpfrac
      • missing_value: -999999.0000
      • comment: xco2_raw*(1-{Meteorology/psurf_apriori_band3}/{Retrieval/psurf}
      • origname: dpfrac
      • fullnamepath: /Retrieval/dpfrac
    Retrieval_t700[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: K
      • long_name: Temperature_at_700hPa
      • missing_value: -999999.0000
      • comment: Temperature at 700 hPa (from GEOS5-FP-IT)
      • origname: t700
      • fullnamepath: /Retrieval/t700
    Retrieval_chi2_o2a[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: dimensionless
      • long_name: Band 1 Reduced Chi-Squared of L2 Fit
      • missing_value: -999999.0000
      • comment: Reduced Chi-Squared for Band 1 (O2A band) of L2 spectral fit
      • origname: chi2_o2a
      • fullnamepath: /Retrieval/chi2_o2a
    Retrieval_aod_ice[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: dimensionless
      • long_name: Ice Cloud Optical Depth
      • missing_value: -999999.0000
      • comment: Retrieved Ice Cloud Optical Depth at 0.755 microns
      • origname: aod_ice
      • fullnamepath: /Retrieval/aod_ice
    Retrieval_iterations[ sounding_id= 0 ..204987] (Type is Int16)
    • attributes
      • units: none
      • long_name: Iterations
      • missing_value: 127
      • comment: No. of iterations used in retrieval
      • origname: iterations
      • fullnamepath: /Retrieval/iterations
    Retrieval_ice_height[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: P/Psurf
      • long_name: Ice Cloud Height
      • missing_value: -999999.0000
      • comment: Retrieved Ice Cloud Height
      • origname: ice_height
      • fullnamepath: /Retrieval/ice_height
    Retrieval_rms_rel_wco2[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: percent
      • long_name: relative_rms_weak_co2_band
      • missing_value: -999999.0000
      • comment: RMS of the L2 fit residuals in the weak co2 band, relative to the continuum signal, times 100 [so it is in percent]
      • origname: rms_rel_wco2
      • fullnamepath: /Retrieval/rms_rel_wco2
    Retrieval_aod_sulfate[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: dimensionless
      • long_name: Sulfate Aerosol Optical Depth
      • missing_value: -999999.0000
      • comment: Retrieved Sulfate Aerosol Optical Depth at 0.755 microns
      • origname: aod_sulfate
      • fullnamepath: /Retrieval/aod_sulfate
    Retrieval_dws[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: dimensionless
      • long_name: Dust+Water+SeaSalt
      • missing_value: -999999.0000
      • comment: Retrieved AOD_dust+AOD_water+AOD_seasalt at 0.755 microns
      • origname: dws
      • fullnamepath: /Retrieval/dws
    Retrieval_albedo_slope_o2a[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: per wn
      • long_name: Retrieved Band 1 reflectance slope (land), or slope of lambertian albedo component of BRDF (ocean)
      • missing_value: -999999.0000
      • origname: albedo_slope_o2a
      • fullnamepath: /Retrieval/albedo_slope_o2a
    Retrieval_rms_rel_sco2[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: percent
      • long_name: relative_rms_strong_co2_band
      • missing_value: -999999.0000
      • comment: RMS of the L2 fit residuals in the strong co2 band, relative to the continuum signal, times 100 [so it is in percent]
      • origname: rms_rel_sco2
      • fullnamepath: /Retrieval/rms_rel_sco2
    Retrieval_eof3_3_rel[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: dimensionless
      • long_name: 3rd EOF of Band 3, relative to Signal
      • missing_value: -999999.0000
      • comment: A scaled version of the EOF 3, Band 3 amplitude
      • origname: eof3_3_rel
      • fullnamepath: /Retrieval/eof3_3_rel
    Retrieval_diverging_steps[ sounding_id= 0 ..204987] (Type is Int16)
    • attributes
      • units: none
      • long_name: diverging_steps
      • missing_value: 127
      • comment: No. of diverging steps taken in retrieval
      • origname: diverging_steps
      • fullnamepath: /Retrieval/diverging_steps
    Retrieval_albedo_sco2[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: none
      • long_name: Band 3 Albedo
      • missing_value: -999999.0000
      • comment: Retrieved Band 3 reflectance (land), or lambertian albedo component of BRDF (ocean)
      • origname: albedo_sco2
      • fullnamepath: /Retrieval/albedo_sco2
    Retrieval_psurf_apriori_b8[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: hPa
      • long_name: B8 Prior Surface Pressure
      • missing_value: -999999.0000
      • comment: Prior surface pressure used in the B8 retrieval, as determined by GEOS5-FP-IT short-term (0-9 hour) forecast
      • origname: psurf_apriori_b8
      • fullnamepath: /Retrieval/psurf_apriori_b8
    Retrieval_chi2_wco2[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: dimensionless
      • long_name: Band 2 Reduced Chi-Squared of L2 Fit
      • missing_value: -999999.0000
      • comment: Reduced Chi-Squared for Band 2 (Weak CO2 band) of L2 spectral fit
      • origname: chi2_wco2
      • fullnamepath: /Retrieval/chi2_wco2
    Retrieval_surface_type[ sounding_id= 0 ..204987] (Type is Int16)
    • attributes
      • units: 0=ocean;1=land
      • long_name: Surface Type
      • missing_value: 127
      • comment: Surface type used in the retrieval: 0=ocean and corresponds to a Coxmunk+Lambertian surface; 1=land and corresponds to a pure Lambertian surface
      • origname: surface_type
      • fullnamepath: /Retrieval/surface_type
    Retrieval_s31[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: none
      • long_name: Signal_band3/Signal_band1
      • missing_value: -999999.0000
      • comment: Ratio of Band 3 to Band 1 signal level
      • origname: s31
      • fullnamepath: /Retrieval/s31
    Retrieval_psurf[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: hPa
      • long_name: Retrieved Surface Pressure
      • missing_value: -999999.0000
      • comment: Surface pressure retrieved by the Level-2 retrieval
      • origname: psurf
      • fullnamepath: /Retrieval/psurf
    Retrieval_aod_total[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: dimensionless
      • long_name: Total Cloud+Aerosol Optical Depth
      • missing_value: -999999.0000
      • comment: Retrieved Total Cloud+Aerosol Optical Depth at 0.755 microns
      • origname: aod_total
      • fullnamepath: /Retrieval/aod_total
    Retrieval_aod_oc[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: dimensionless
      • long_name: Organic Carbon Optical Depth
      • missing_value: -999999.0000
      • comment: Retrieved Organic Carbon Optical Depth at 0.755 microns
      • origname: aod_oc
      • fullnamepath: /Retrieval/aod_oc
    Retrieval_xco2_raw[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: ppm
      • long_name: Raw value of Retrieved XCO2
      • missing_value: -999999.0000
      • origname: xco2_raw
      • fullnamepath: /Retrieval/xco2_raw
    Sounding_snr_sco2[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: none
      • long_name: snr_strong_CO2_L1b
      • missing_value: -999999.0000
      • comment: Strong CO2-Band Continuum Signal-to-Noise Ratio
      • origname: snr_sco2
      • fullnamepath: /Sounding/snr_sco2
    Sounding_operation_mode[ sounding_id= 0 ..204987] (Type is Int16)
    • attributes
      • units: none
      • long_name: OCO-2 Operation Mode: 0=Nadir, 1=Glint, 2=Target, 3=Transition to/from Target
      • missing_value: 127
      • comment: Normalized XCO2 averaging kernel; Defined on layer boundaries. These are oriented space-to-surface, so the first element defines the TOA, the last element defines the surface.
      • origname: operation_mode
      • fullnamepath: /Sounding/operation_mode
    Sounding_snr_wco2[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: none
      • long_name: snr_weak_CO2_L1b
      • missing_value: -999999.0000
      • comment: Weak CO2-Band Continuum Signal-to-Noise Ratio
      • origname: snr_wco2
      • fullnamepath: /Sounding/snr_wco2
    Sounding_glint_angle[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: degrees
      • long_name: sounding_glint_angle
      • missing_value: -999999.0000
      • comment: Angular distance from viewing along the perfect glint direction
      • origname: glint_angle
      • fullnamepath: /Sounding/glint_angle
    Sounding_altitude_stddev[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: meters
      • long_name: B9 Altitude Stddev
      • missing_value: -999999.0000
      • comment: Standard deviation of surface elevation within the FOV
      • origname: altitude_stddev
      • fullnamepath: /Sounding/altitude_stddev
    Sounding_sensor_azimuth_angle[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: degrees East of North
      • long_name: sounding_azimuth
      • missing_value: -999999.0000
      • comment: azimuth angle of the satellite at the time of the measurement
      • origname: sensor_azimuth_angle
      • fullnamepath: /Sounding/sensor_azimuth_angle
    Sounding_airmass[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: degrees
      • long_name: relative_airmass
      • missing_value: -999999.0000
      • comment: Airmass, computed as 1/cos(solar_zenith_angle) + 1/cos(sensor_zenith_angle)
      • origname: airmass
      • fullnamepath: /Sounding/airmass
    Sounding_land_water_indicator[ sounding_id= 0 ..204987] (Type is Int16)
    • attributes
      • units: none
      • long_name: B9 Land Water Indicator
      • missing_value: 127
      • comment: 0=Land;1=Ocean;2=Inland Water;3=Mixed
      • origname: land_water_indicator
      • fullnamepath: /Sounding/land_water_indicator
    Sounding_snr_o2a[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: none
      • long_name: snr_O2_L1b
      • missing_value: -999999.0000
      • comment: O2A-Band Continuum Signal-to-Noise Ratio
      • origname: snr_o2a
      • fullnamepath: /Sounding/snr_o2a
    Sounding_solar_azimuth_angle[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: degrees East of North
      • long_name: sounding_solar_azimuth
      • missing_value: -999999.0000
      • comment: solar azimuth angle at the time of the measurement
      • origname: solar_azimuth_angle
      • fullnamepath: /Sounding/solar_azimuth_angle
    Sounding_path[ sounding_id= 0 ..204987] (Type is Byte)
    • attributes
      • units: none
      • long_name: OCO-2 orbit path number
      • missing_value: -1
      • comment: OCO-2 fixed orbit path number ranging from 1-233
      • origname: path
      • fullnamepath: /Sounding/path
    Sounding_altitude[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: meters
      • long_name: B9 Altitude
      • missing_value: -999999.0000
      • comment: Surface Altitude in meters above sea level
      • origname: altitude
      • fullnamepath: /Sounding/altitude
    Sounding_l1b_type[ sounding_id= 0 ..204987] (Type is Int32)
    • attributes
      • units: none
      • long_name: JPL Processing Version
      • missing_value: -9999
      • origname: l1b_type
      • fullnamepath: /Sounding/l1b_type
    Sounding_footprint[ sounding_id= 0 ..204987] (Type is Int16)
    • attributes
      • units: none
      • long_name: Footprint Number
      • missing_value: 127
      • comment: Index of OCO-2 Sounding 1-8
      • origname: footprint
      • fullnamepath: /Sounding/footprint
    Sounding_land_fraction[ sounding_id= 0 ..204987] (Type is Int16)
    • attributes
      • units: percent
      • long_name: Land Fraction
      • missing_value: 127
      • comment: Fraction of the footprint that contains land in percent
      • origname: land_fraction
      • fullnamepath: /Sounding/land_fraction
    Sounding_orbit[ sounding_id= 0 ..204987] (Type is Int32)
    • attributes
      • units: none
      • long_name: orbit number
      • missing_value: -9999
      • comment: OCO-2 orbit number since mission start
      • origname: orbit
      • fullnamepath: /Sounding/orbit
    xco2_uncertainty[ sounding_id= 0 ..204987] (Type is Float32)
    • attributes
      • units: ppm
      • long_name: XCO2_Posterior_Error
      • missing_value: -999999.0000
      • origname: xco2_uncertainty
      • fullnamepath: /xco2_uncertainty
    co2_profile_apriori[ sounding_id= 0 ..204987] [ levels= 0 ..19] (Type is Float32)
    • attributes
      • units: ppm
      • long_name: CO2 Apriori Profile
      • missing_value: -999999.0000
      • comment: Prior CO2 Prior assumed by L2 code; Defined on layer boundaries. These are oriented space-to-surface, so the first element defines the TOA, the last element defines the surface.
      • origname: co2_profile_apriori
      • fullnamepath: /co2_profile_apriori
    vertices[ vertices= 0 ..3] (Type is Int16)
    • attributes
      • origname: vertices
      • fullnamepath: /vertices
    bands[ bands= 0 ..2] (Type is Int16)
    • attributes
      • origname: bands
      • fullnamepath: /bands
    epoch_dimension[ epoch_dimension= 0 ..6] (Type is Float32)
    no attributes
    footprints[ footprints= 0 ..7] (Type is Int16)
    • attributes
      • origname: footprints
      • fullnamepath: /footprints
    levels[ levels= 0 ..19] (Type is Int16)
    • attributes
      • origname: levels
      • fullnamepath: /levels
    source_files[ source_files= 0 ..17] (Type is String)
    • attributes
      • units: none
      • long_name: L2 Source File
      • missing_value: Missing
      • comment: Source L2 File Names for these soundings
      • origname: source_files
      • fullnamepath: /source_files
    vertex_latitude[ sounding_id= 0 ..204987] [ vertices= 0 ..3] (Type is Float32)
    • attributes
      • units: degrees_north
      • long_name: vertex_latitude
      • missing_value: -999999.0000
      • comment: corner latitudes of the measurement FOV
      • origname: vertex_latitude
      • fullnamepath: /vertex_latitude
    vertex_longitude[ sounding_id= 0 ..204987] [ vertices= 0 ..3] (Type is Float32)
    • attributes
      • units: degrees_east
      • long_name: vertex_longitude
      • missing_value: -999999.0000
      • comment: corner longitudes of the measurement FOV
      • origname: vertex_longitude
      • fullnamepath: /vertex_longitude

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