OPeNDAP Data Access Form for JA1_GPN_2PeP374_156_20120302_202102_20120302_211712.nc
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dataset: JA1_GPN_2PeP374_156_20120302_202102_20120302_211712.nc




  • NC_GLOBAL
    • Conventions: CF-1.1
    • title: GDR - Native dataset
    • institution: CNES and JPL
    • source: radar altimeter
    • history: 2016-03-16 02:57:02 : Creation
    • contact: CNES aviso@altimetry.fr NASA/JPL podaac@podaac.jpl.nasa.gov
    • references: CNES Reprocessing Tool 2.0 (Updates to time tags, ranges, models and all JMR derived parameters updated with dedicated recalibration of JMR in 2015)
    • processing_center: SALP and JSDS
    • reference_document: AVISO and PODAAC User Handbook IGDR and GDR Jason Products, SALP-MU-M5-OP-13184-CN
    • mission_name: Jason-1
    • altimeter_sensor_name: POSEIDON-2
    • radiometer_sensor_name: JMR
    • doris_sensor_name: 2GM
    • gpsr_sensor_name: TRSR
    • acq_station_name: CNES/NASA
    • cycle_number: 374
    • absolute_rev_number: 47387
    • pass_number: 156
    • absolute_pass_number: 94898
    • equator_time: 2012-03-02 20:49:06.635000
    • equator_longitude: 241.6700000000000
    • first_meas_time: 2012-03-02 20:21:02.991761
    • last_meas_time: 2012-03-02 21:17:12.648388
    • ellipsoid_axis: 6378136.300000000
    • ellipsoid_flattening: 0.003352813177896900


time[ time= 0 ..3062] (Type is Float64)
  • attributes
    • long_name: time (sec. since 2000-01-01)
    • standard_name: time
    • calendar: gregorian
    • tai_utc_difference: 34.00000000000000
    • leap_second: 0000-00-00 00:00:00
    • units: seconds since 2000-01-01 00:00:00.0
    • comment: [tai_utc_difference] is the difference between TAI - UTC (i.e., leap seconds) for the first measurement of the data set. [leap_second] is the UTC time at which a leap second occurs in the data set, if any. After this UTC time, the [tai_utc_difference] is increased by 1 second. time variable is corrected from datation bias. See Jason-1 User handbook.
meas_ind[ meas_ind= 0 ..19] (Type is Int16)
  • attributes
    • long_name: elementary measurement index
    • units: count
    • comment: Set to be compliant with the CF-1.1 convention
time_20hz[ time= 0 ..3062] [ meas_ind= 0 ..19] (Grid of Float64 values)
  • attributes
    • _FillValue: 1.844674407370955e+19
    • long_name: time 20 Hz (sec. since 2000-01-01)
    • standard_name: time
    • calendar: gregorian
    • tai_utc_difference: 34.00000000000000
    • leap_second: 0000-00-00 00:00:00
    • units: seconds since 2000-01-01 00:00:00.0
    • comment: [tai_utc_difference] is the difference between TAI - UTC (i.e., leap seconds) for the first measurement of the data set. [leap_second] is the UTC time at which a leap second occurs in the data set, if any. After this UTC time, the [tai_utc_difference] is increased by 1 second. time_20hz variable is corrected from datation bias. See Jason-1 User handbook.
lat[ time= 0 ..3062] (Grid of Int32 values)
  • attributes
    • long_name: latitude
    • standard_name: latitude
    • units: degrees_north
    • quality_flag: orb_state_flag_rest
    • scale_factor: 1.000000000000000e-06
    • comment: Positive latitude is North latitude, negative latitude is South latitude. See Jason-1 User Handbook.
lon[ time= 0 ..3062] (Grid of Int32 values)
  • attributes
    • long_name: longitude
    • standard_name: longitude
    • units: degrees_east
    • quality_flag: orb_state_flag_rest
    • scale_factor: 1.000000000000000e-06
    • comment: East longitude relative to Greenwich meridian. See Jason-1 User Handbook.
lon_20hz[ time= 0 ..3062] [ meas_ind= 0 ..19] (Grid of Int32 values)
  • attributes
    • _FillValue: 2147483647
    • long_name: 20 Hz longitude
    • standard_name: longitude
    • units: degrees_east
    • scale_factor: 1.000000000000000e-06
    • comment: East longitude relative to Greenwich meridian. See Jason-1 User Handbook
lat_20hz[ time= 0 ..3062] [ meas_ind= 0 ..19] (Grid of Int32 values)
  • attributes
    • _FillValue: 2147483647
    • long_name: 20 Hz latitude
    • standard_name: latitude
    • units: degrees_north
    • scale_factor: 1.000000000000000e-06
    • comment: Positive latitude is North latitude, negative latitude is South latitude. See Jason-1 User Handbook
surface_type[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: surface type
    • flag_values: 0, 1, 2, 3
    • flag_meanings: ocean lake_enclosed_sea ice land
    • coordinates: lon lat
    • comment: Computed using a DTM2000 file: 0 = open oceans or semi-enclosed seas; 1 = enclosed seas or lakes; 2 = continental ice; 3 = land. See Jason-1 User Handbook
surface_type_globcover[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: surface type globcover
    • flag_values: 0b, 1b, 2b, 3b, 4b, 5b, 6b
    • flag_meanings: open_ocean land continental_water aquatic_vegetation continental_ice_snow floating_ice salted_basin
    • coordinates: lon lat
    • comment: Computed from a mask built with MODIS and GlobCover data, 0 = Open ocean; 1 = Land; 2 = Continental waters; 3 = Aquatic vegetation; 4 = Continental ice and snow; 5 = Floating ice; 6 = Salted basin. See Jason-1 User Handbook
alt_echo_type[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: altimeter echo type
    • flag_values: 0, 1
    • flag_meanings: ocean_like non_ocean_like
    • coordinates: lon lat
    • comment: The altimeter echo type is determined by testing the rms of the high rate range measurements against a threshold as well as the number of valid high rate range measurements against a minimum value
rad_surf_type[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: radiometer surface type
    • flag_values: 0, 1, 2
    • flag_meanings: open_ocean near_coast land
    • coordinates: lon lat
    • comment: The radiometer surface type flag is applicable to the radiometer wet troposphere path delays provided by rad_wet_tropo_corr. A value of 0 indicates that open ocean processing is used to compute the path delay, 1 indicates coastal processing is used, and 2 indicates the path delay is invalid due to land
rad_distance_to_land[ time= 0 ..3062] (Grid of Int32 values)
  • attributes
    • _FillValue: 2147483647
    • long_name: radiometer radial distance to land
    • units: m
    • coordinates: lon lat
    • comment: Shortest distance between nadir sub-satellite point and land
qual_alt_1hz_range_ku[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: quality flag for 1 Hz altimeter data: Ku band range
    • flag_values: 0, 1
    • flag_meanings: good bad
    • coordinates: lon lat
qual_alt_1hz_range_c[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: quality flag for 1 Hz altimeter data: C band range
    • flag_values: 0, 1
    • flag_meanings: good bad
    • coordinates: lon lat
qual_alt_1hz_swh_ku[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: quality flag for 1 Hz altimeter data: Ku band SWH
    • flag_values: 0, 1
    • flag_meanings: good bad
    • coordinates: lon lat
qual_alt_1hz_swh_c[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: quality flag for 1 Hz altimeter data: C band SWH
    • flag_values: 0, 1
    • flag_meanings: good bad
    • coordinates: lon lat
qual_alt_1hz_sig0_ku[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: quality flag for 1 Hz altimeter data: Ku band backscatter coefficient
    • flag_values: 0, 1
    • flag_meanings: good bad
    • coordinates: lon lat
qual_alt_1hz_sig0_c[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: quality flag for 1 Hz altimeter data: C band backscatter coefficient
    • flag_values: 0, 1
    • flag_meanings: good bad
    • coordinates: lon lat
qual_alt_1hz_off_nadir_angle_wf_ku[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: quality flag for 1 Hz altimeter data: off nadir angle from Ku band
    • flag_values: 0, 1
    • flag_meanings: good bad
    • coordinates: lon lat
qual_inst_corr_1hz_range_ku[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: quality flag for 1 Hz instrumental correction: Ku band range
    • flag_values: 0, 1
    • flag_meanings: good bad
    • coordinates: lon lat
qual_inst_corr_1hz_range_c[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: quality flag for 1 Hz instrumental correction: C band range
    • flag_values: 0, 1
    • flag_meanings: good bad
    • coordinates: lon lat
qual_inst_corr_1hz_swh_ku[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: quality flag for 1 Hz instrumental correction: Ku band SWH
    • flag_values: 0, 1
    • flag_meanings: good bad
    • coordinates: lon lat
qual_inst_corr_1hz_swh_c[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: quality flag for 1 Hz instrumental correction: C band SWH
    • flag_values: 0, 1
    • flag_meanings: good bad
    • coordinates: lon lat
qual_inst_corr_1hz_sig0_ku[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: quality flag for 1 Hz instrumental correction: Ku band backscatter coefficient
    • flag_values: 0, 1
    • flag_meanings: good bad
    • coordinates: lon lat
qual_inst_corr_1hz_sig0_c[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: quality flag for 1 Hz instrumental correction: C band backscatter coefficient
    • flag_values: 0, 1
    • flag_meanings: good bad
    • coordinates: lon lat
qual_rad_1hz_tb187[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: quality flag for 1 Hz radiometer data: 18.7 GHz brightness temperature
    • flag_values: 0, 1
    • flag_meanings: good bad
    • coordinates: lon lat
qual_rad_1hz_tb238[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: quality flag for 1 Hz radiometer data: 23.8 GHz brightness temperature
    • flag_values: 0, 1
    • flag_meanings: good bad
    • coordinates: lon lat
qual_rad_1hz_tb340[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: quality flag for 1 Hz radiometer data: 34.0 GHz brightness temperature
    • flag_values: 0, 1
    • flag_meanings: good bad
    • coordinates: lon lat
rad_averaging_flag[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: radiometer along-track averaging flag
    • flag_values: 0, 1
    • flag_meanings: good bad
    • coordinates: lon lat
rad_land_frac_187[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: radiometer 18.7 GHz antenna gain weighted land fraction in main beam
    • units: %
    • scale_factor: 0.01000000000000000
    • coordinates: lon lat
rad_land_frac_238[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: radiometer 23.8 GHz antenna gain weighted land fraction in main beam
    • units: %
    • scale_factor: 0.01000000000000000
    • coordinates: lon lat
rad_land_frac_340[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: radiometer 34.0 GHz antenna gain weighted land fraction in main beam
    • units: %
    • scale_factor: 0.01000000000000000
    • coordinates: lon lat
alt_state_flag_oper[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: altimeter state flag: altimeter operating
    • flag_values: 0, 1
    • flag_meanings: SideA SideB
    • coordinates: lon lat
    • comment: Side A = nominal; Side B = redondancy
alt_state_flag_c_band[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: altimeter state flag: C bandwidth used
    • flag_values: 0, 1
    • flag_meanings: 320MHz 100MHz
    • coordinates: lon lat
alt_state_flag_band_seq[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: altimeter state flag: Ku/C band sequencing
    • flag_values: 0, 1
    • flag_meanings: 3Ku_1C_3Ku 2Ku_1C_2Ku
    • coordinates: lon lat
alt_state_flag_ku_band_status[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: altimeter state flag: Ku band status
    • flag_values: 0, 1
    • flag_meanings: On Off
    • coordinates: lon lat
alt_state_flag_c_band_status[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: altimeter state flag: C band status
    • flag_values: 0, 1
    • flag_meanings: On Off
    • coordinates: lon lat
rad_state_flag_oper[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: radiometer state flag: radiometer operating
    • flag_values: 0, 1
    • flag_meanings: Side A Side B
    • coordinates: lon lat
    • comment: Side A nominal; Side B redundancy
orb_state_flag_rest[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: orbit state flag: restituted orbit
    • flag_values: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
    • flag_meanings: op_maneuver op_adjusted op_extrapolated pre_adjusted pre_maneuver pre_interpolated_gap pre_extrapolated_L1 pre_extrapolated_L1S2 pre_extrapolated_S2 DIODE
    • coordinates: lon lat
    • comment: 0 characterizes a mission operations orbit that is computed during a maneuver period, 1 stands for an adjusted mission operations orbit, 2 stands for an extrapolated mission operations orbit, 3 stands for an adjusted (preliminary/precise) orbit, 4 indicates that the (preliminary/precise) orbit is estimated during a maneuver period, 5 indicates that the (preliminary/precise) orbit is interpolated over a tracking data gap, 6 means that the (preliminary/precise) orbit is extrapolated for a duration less than 1 day, 7 means that the (preliminary/precise) orbit is extrapolated for a duration that ranges from 1 day to 2 days, 8 means that the (preliminary/precise) orbit is extrapolated for a duration larger than 2 days, or that the orbit is extrapolated just after a maneuver, 9 stands for the DORIS DIODE navigator orbit. The nominal value is 3
rain_flag[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: rain flag
    • flag_values: 0, 1
    • flag_meanings: no_rain rain
    • coordinates: lon lat
    • comment: See Jason-1 User Handbook
rad_rain_flag[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: radiometer rain flag
    • flag_values: 0, 1
    • flag_meanings: no_rain rain
    • coordinates: lon lat
    • comment: See Jason-1 User Handbook. The radiometer rain flag indicates where the radiometer wet troposphere path delay (rad_wet_tropo_corr) is invalid due to rain contamination
ice_flag[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: ice flag
    • flag_values: 0, 1
    • flag_meanings: no_ice ice
    • coordinates: lon lat
    • comment: See Jason-1 User Handbook
rad_sea_ice_flag[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: radiometer sea-ice flag
    • flag_values: 0, 1
    • flag_meanings: no_sea_ice, sea_ice
    • coordinates: lon lat
    • comment: See Jason-1 User Handbook. The radiometer sea ice flag indicates where the radiometer wet troposphere path delay (rad_wet_tropo_corr) is invalid due to sea ice contamination
interp_flag_tb[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: radiometer brightness temperatures interpolation flag
    • flag_values: 0, 1, 2, 3
    • flag_meanings: good interpolation_with_gap extrapolation fail
    • coordinates: lon lat
    • comment: Possible values are: 0 interpolation without gap between JMR data, 1 interpolation with gap between JMR data, 2 extrapolation of JMR data, 3 failure of extrapolation and interpolation
interp_flag_ocean_tide_sol1[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: ocean tide solution 1 interpolation flag
    • flag_values: 0b, 1b
    • flag_meanings: good bad
    • coordinates: lon lat
    • comment: 0 = valid interpolation; 1 = failure of interpolation i.e. ocean_tide_sol1 set to default value
interp_flag_ocean_tide_sol2[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: ocean tide solution 2 interpolation flag
    • flag_values: 0b, 1b
    • flag_meanings: good bad
    • coordinates: lon lat
    • comment: 0 = valid interpolation; 1 = failure of interpolation i.e. ocean_tide_sol2 set to default value
alt[ time= 0 ..3062] (Grid of Int32 values)
  • attributes
    • _FillValue: 2147483647
    • long_name: 1 Hz altitude of satellite
    • standard_name: height_above_reference_ellipsoid
    • units: m
    • quality_flag: orb_state_flag_rest
    • add_offset: 1300000.000000000
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
    • comment: Altitude of satellite above the reference ellipsoid.
alt_20hz[ time= 0 ..3062] [ meas_ind= 0 ..19] (Grid of Int32 values)
  • attributes
    • _FillValue: 2147483647
    • long_name: 20 Hz altitude of satellite
    • standard_name: height_above_reference_ellipsoid
    • units: m
    • add_offset: 1300000.000000000
    • scale_factor: 0.0001000000000000000
    • coordinates: lon_20hz lat_20hz
    • comment: Altitude of satellite above reference ellipsoid
orb_alt_rate[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: 1 Hz orbital altitude rate
    • units: m/s
    • scale_factor: 0.01000000000000000
    • coordinates: lon lat
    • comment: The reference surface for the orbital altitude rate is the combined mean_sea_surface/geoid surface. It is used to compute the Doppler correction on the altimeter range (doppler_corr_ku, doppler_corr_c)
range_ku[ time= 0 ..3062] (Grid of Int32 values)
  • attributes
    • _FillValue: 2147483647
    • long_name: 1 Hz Ku band corrected altimeter range
    • standard_name: altimeter_range
    • units: m
    • quality_flag: qual_alt_1hz_range_ku
    • add_offset: 1300000.000000000
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
    • comment: All instrumental corrections included, i.e. distance antenna-COG (cog_corr), USO drift correction (uso_corr), internal path correction (internal_path_delay_corr_ku), Doppler correction (doppler_corr_ku), modeled instrumental errors correction (modeled_instr_corr_range_ku) and system bias. range updated to account for reference plane and internal path delay
range_20hz_ku[ time= 0 ..3062] [ meas_ind= 0 ..19] (Grid of Int32 values)
  • attributes
    • _FillValue: 2147483647
    • long_name: 20 Hz Ku band corrected altimeter range
    • standard_name: altimeter_range
    • units: m
    • add_offset: 1300000.000000000
    • scale_factor: 0.0001000000000000000
    • coordinates: lon_20hz lat_20hz
    • comment: All instrumental corrections included, i.e. distance antenna-COG (cog_corr), USO drift correction (uso_corr), internal path correction (internal_path_delay_corr_ku), Doppler correction (doppler_corr_ku), modeled instrumental errors correction (modeled_instr_corr_range_ku) and system bias. range_20hz updated to account for reference plane and internal path delay
range_c[ time= 0 ..3062] (Grid of Int32 values)
  • attributes
    • _FillValue: 2147483647
    • long_name: 1 Hz C band corrected altimeter range
    • standard_name: altimeter_range
    • units: m
    • quality_flag: qual_alt_1hz_range_c
    • add_offset: 1300000.000000000
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
    • comment: All instrumental corrections included, i.e. distance antenna-COG (cog_corr), USO drift correction (uso_corr), internal path correction (internal_path_delay_corr_c), Doppler correction (doppler_corr_c), modeled instrumental errors correction (modeled_instr_corr_range_c) and system bias. range_c updated to account for reference plane and internal path delay
range_20hz_c[ time= 0 ..3062] [ meas_ind= 0 ..19] (Grid of Int32 values)
  • attributes
    • _FillValue: 2147483647
    • long_name: 20 Hz C band corrected altimeter range
    • standard_name: altimeter_range
    • units: m
    • add_offset: 1300000.000000000
    • scale_factor: 0.0001000000000000000
    • coordinates: lon_20hz lat_20hz
    • comment: All instrumental corrections included, i.e. distance antenna-COG (cog_corr), USO drift correction (uso_corr), internal path correction (internal_path_delay_corr_c), Doppler correction (doppler_corr_c), modeled instrumental errors correction (modeled_instr_corr_range_c) and system bias. range_20hz_c updated to account for reference plane and internal path delay
range_used_20hz_ku[ time= 0 ..3062] [ meas_ind= 0 ..19] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: 20 Hz flag for utilization in the computation of 1Hz Ku band range
    • flag_values: 0, 1
    • flag_meanings: yes no
    • coordinates: lon_20hz lat_20hz
    • comment: Map of valid points used to compute the 1-Hz Ku-band altimeter range
range_used_20hz_c[ time= 0 ..3062] [ meas_ind= 0 ..19] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: 20 Hz flag for utilization in the computation of 1Hz C band range
    • flag_values: 0, 1
    • flag_meanings: yes no
    • coordinates: lon_20hz lat_20hz
    • comment: Map of valid points used to compute the 1-Hz C-band altimeter range
range_rms_ku[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: RMS of the Ku band range
    • units: m
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
    • comment: Compression of Ku-band high rate elements is preceded by a detection of outliers. Only valid high-rate values are used to compute this element
range_rms_c[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: RMS of the C band range
    • units: m
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
    • comment: Compression of C-band high rate elements is preceded by a detection of outliers. Only valid high-rate values are used to compute this element
range_numval_ku[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: number of valid points for Ku band range
    • units: count
    • valid_min: 0
    • valid_max: 20
    • coordinates: lon lat
range_numval_c[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: number of valid points for C band range
    • units: count
    • valid_min: 0
    • valid_max: 20
    • coordinates: lon lat
number_of_iterations_ku[ time= 0 ..3062] [ meas_ind= 0 ..19] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: 20 Hz number of iterations of the ocean retracking in Ku band
    • units: count
    • coordinates: lon_20hz lat_20hz
number_of_iterations_c[ time= 0 ..3062] [ meas_ind= 0 ..19] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: 20 Hz number of iterations of the ocean retracking in C band
    • units: count
    • coordinates: lon_20hz lat_20hz
net_instr_corr_range_ku[ time= 0 ..3062] (Grid of Int32 values)
  • attributes
    • _FillValue: 2147483647
    • long_name: net instrumental correction on the Ku band range
    • units: m
    • quality_flag: qual_inst_corr_1hz_range_ku
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
    • comment: Sum of distance antenna-COG (cog_corr), USO drift correction (uso_corr), internal path correction (internal_path_delay_corr_ku), Doppler correction (doppler_corr_ku), modeled instrumental errors correction (modeled_instr_corr_range_ku) and system bias. Updated to account for reference plane and internal path delay
net_instr_corr_range_c[ time= 0 ..3062] (Grid of Int32 values)
  • attributes
    • _FillValue: 2147483647
    • long_name: net instrumental correction on the C band range
    • units: m
    • quality_flag: qual_inst_corr_1hz_range_c
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
    • comment: Sum of distance antenna-COG (cog_corr), USO drift correction (uso_corr), internal path correction (internal_path_delay_corr_c), Doppler correction (doppler_corr_c), modeled instrumental errors correction (modeled_instr_corr_range_c) and system bias. Updated to account for reference plane and internal path delay
model_dry_tropo_corr[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: model dry tropospheric correction
    • standard_name: altimeter_range_correction_due_to_dry_troposphere
    • source: European Center for Medium Range Weather Forecasting
    • institution: ECMWF
    • units: m
    • quality_flag:
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
    • comment: Computed at the altimeter time-tag from the interpolation of 2 meteorological fields that surround the altimeter time-tag. A dry tropospheric correction must be added (negative value) to the instrument range to correct this range measurement for dry tropospheric range delays of the radar pulse. See Jason-1 User Handbook
model_dry_tropo_corr_era[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: model dry tropospheric correction from ERA_Interim products
    • standard_name: altimeter_range_correction_due_to_dry_troposphere
    • source: European Center for Medium Range Weather Forecasting
    • institution: ECMWF
    • units: m
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
    • comment: Courtesy of ECMWF as provider of met data for the atmospheric corrections. Computed at the altimeter time-tag from the interpolation of 2 ERA meteorological fields that surround the altimeter time-tag. A dry tropospheric correction must be added (negative value) to the instrument range to correct this range measurement for dry tropospheric range delays of the radar pulse. See Jason-1 User Handbook
model_wet_tropo_corr[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: model wet tropospheric correction
    • standard_name: altimeter_range_correction_due_to_wet_troposphere
    • source: European Center for Medium Range Weather Forecasting
    • institution: ECMWF
    • units: m
    • quality_flag:
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
    • comment: Computed at the altimeter time-tag from the interpolation of 2 meteorological fields that surround the altimeter time-tag. A wet tropospheric correction must be added (negative value) to the instrument range to correct this range measurement for wet tropospheric range delays of the radar pulse. See Jason-1 User Handbook
model_wet_tropo_corr_era[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: model wet tropospheric correction from ERA_Interim products
    • standard_name: altimeter_range_correction_due_to_wet_troposphere
    • source: European Center for Medium Range Weather Forecasting
    • institution: ECMWF
    • units: m
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
    • comment: Courtesy of ECMWF as provider of met data for the atmospheric corrections. Computed at the altimeter time-tag from the interpolation of 2 ERA meteorological fields that surround the altimeter time-tag. A wet tropospheric correction must be added (negative value) to the instrument range to correct this range measurement for wet tropospheric range delays of the radar pulse. See Jason-1 User Handbook
rad_wet_tropo_corr[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: radiometer wet tropospheric correction
    • standard_name: altimeter_range_correction_due_to_wet_troposphere
    • source: JMR
    • institution: NASA/JPL
    • units: m
    • quality_flag: qual_rad_1hz_tb187 and qual_rad_1hz_tb238 and qual_rad_1hz_tb340 and interp_flag_tb
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
    • comment: A wet tropospheric correction must be added (negative value) to the instrument range to correct this range measurement for wet tropospheric range delays of the radar pulse
iono_corr_alt_ku[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: altimeter ionospheric correction on Ku band
    • standard_name: altimeter_range_correction_due_to_ionosphere
    • source: Poseidon-2
    • institution: CNES
    • units: m
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
    • comment: An ionospheric correction must be added (negative value) to the instrument range to correct this range measurement for ionospheric range delays of the radar pulse. See Jason-1 User Handbook
iono_corr_gim_ku[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: GIM ionospheric correction on Ku band
    • standard_name: altimeter_range_correction_due_to_ionosphere
    • institution: NASA/JPL
    • units: m
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
    • comment: An ionospheric correction must be added (negative value) to the instrument range to correct this range measurement for ionospheric range delays of the radar pulse. See Jason-1 User Handbook
sea_state_bias_ku[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: sea state bias correction in Ku band
    • standard_name: sea_surface_height_bias_due_to_sea_surface_roughness
    • source: Empirical solution fitted to Jason-1 GDR-C data. Computed using updated values of sigma0 (atmospheric correction being updated)
    • institution: CNES
    • units: m
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
    • comment: Computed using wind speed from sigma0 using updated atmospheric attenuation values. A sea state bias correction must be added (negative value) to the instrument range to correct this range measurement for sea state delays of the radar pulse. This element should not be used over land. See Jason-1 User Handbook
sea_state_bias_c[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: sea state bias correction in C band
    • standard_name: sea_surface_height_bias_due_to_sea_surface_roughness
    • source: Empirical solution fitted to Jason-1 GDR-C data. Computed using updated values of sigma0 (atmospheric correction being updated)
    • institution: CNES
    • units: m
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
    • comment: Computed using wind speed from sigma0 using updated atmospheric attenuation values. A sea state bias correction must be added (negative value) to the instrument range to correct this range measurement for sea state delays of the radar pulse. This element should not be used over land. See Jason-1 User Handbook
swh_ku[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: Ku band corrected significant waveheight
    • standard_name: sea_surface_wave_significant_height
    • units: m
    • quality_flag: qual_alt_1hz_swh_ku
    • scale_factor: 0.001000000000000000
    • coordinates: lon lat
    • comment: All instrumental corrections included, i.e. modeled instrumental errors correction (modeled_instr_corr_swh_ku) and system bias
swh_20hz_ku[ time= 0 ..3062] [ meas_ind= 0 ..19] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: 20 Hz Ku band corrected significant waveheight
    • standard_name: sea_surface_wave_significant_height
    • units: m
    • scale_factor: 0.001000000000000000
    • coordinates: lon_20hz lat_20hz
    • comment: All instrumental corrections included, i.e. modeled instrumental errors correction (modeled_instr_corr_swh_ku) and system bias
swh_c[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: C band corrected significant waveheight
    • standard_name: sea_surface_wave_significant_height
    • units: m
    • quality_flag: qual_alt_1hz_swh_c
    • scale_factor: 0.001000000000000000
    • coordinates: lon lat
    • comment: All instrumental corrections included, i.e. modeled instrumental errors correction (modeled_instr_corr_swh_c) and system bias
swh_20hz_c[ time= 0 ..3062] [ meas_ind= 0 ..19] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: 20 Hz C band corrected significant waveheight
    • standard_name: sea_surface_wave_significant_height
    • units: m
    • scale_factor: 0.001000000000000000
    • coordinates: lon_20hz lat_20hz
    • comment: All instrumental corrections included, i.e. modeled instrumental errors correction (modeled_instr_corr_swh_c) and system bias
swh_used_20hz_ku[ time= 0 ..3062] [ meas_ind= 0 ..19] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: 20 Hz flag for utilization in the computation of 1Hz Ku band significant waveheight
    • flag_values: 0, 1
    • flag_meanings: yes no
    • coordinates: lon_20hz lat_20hz
    • comment: Map of valid points used to compute the 1-Hz Ku-band significant waveheight
swh_used_20hz_c[ time= 0 ..3062] [ meas_ind= 0 ..19] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: 20 Hz flag for utilization in the computation of 1Hz C band significant waveheight
    • flag_values: 0, 1
    • flag_meanings: yes no
    • coordinates: lon_20hz lat_20hz
    • comment: Map of valid points used to compute the 1-Hz C-band significant waveheight
swh_rms_ku[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: RMS of the Ku band significant waveheight
    • units: m
    • scale_factor: 0.001000000000000000
    • coordinates: lon lat
    • comment: Compression of Ku-band high rate elements is preceded by a detection of outliers. Only valid high-rate values are used to compute this element
swh_rms_c[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: RMS of the C band significant waveheight
    • units: m
    • scale_factor: 0.001000000000000000
    • coordinates: lon lat
    • comment: Compression of C-band high rate elements is preceded by a detection of outliers. Only valid high-rate values are used to compute this element
swh_numval_ku[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: number of valid points used to compute Ku significant waveheight
    • units: count
    • valid_min: 0
    • valid_max: 20
    • coordinates: lon lat
swh_numval_c[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: number of valid points used to compute C significant waveheight
    • units: count
    • valid_min: 0
    • valid_max: 20
    • coordinates: lon lat
net_instr_corr_swh_ku[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: net instrumental correction on Ku band significant waveheight
    • units: m
    • quality_flag: qual_inst_corr_1hz_swh_ku
    • scale_factor: 0.001000000000000000
    • coordinates: lon lat
    • comment: Sum of modeled instrumental errors correction (modeled_instr_corr_swh_ku) and system bias
net_instr_corr_swh_c[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: net instrumental correction on C band significant waveheight
    • units: m
    • quality_flag: qual_inst_corr_1hz_swh_c
    • scale_factor: 0.001000000000000000
    • coordinates: lon lat
    • comment: Sum of modeled instrumental errors correction (modeled_instr_corr_swh_c) and system bias
sig0_ku[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: Ku band corrected backscatter coefficient
    • standard_name: surface_backwards_scattering_coefficient_of_radar_wave
    • units: dB
    • quality_flag: qual_alt_1hz_sig0_ku
    • scale_factor: 0.01000000000000000
    • coordinates: lon lat
    • comment: All instrumental corrections included, excepted the system bias, i.e. AGC instrumental errors correction, internal calibration correction (internal_corr_sig0_ku), modeled instrumental errors correction (modeled_instr_corr_sig0_ku) and atmospheric attenuation (atmos_corr_sig0_ku)
sig0_20hz_ku[ time= 0 ..3062] [ meas_ind= 0 ..19] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: 20 Hz Ku band corrected backscatter coefficient
    • standard_name: surface_backwards_scattering_coefficient_of_radar_wave
    • units: dB
    • scale_factor: 0.01000000000000000
    • coordinates: lon_20hz lat_20hz
    • comment: All instrumental corrections included, excepted the system bias, i.e. AGC instrumental errors correction, internal calibration correction (internal_corr_sig0_ku), modeled instrumental errors correction (modeled_instr_corr_sig0_ku) and atmospheric attenuation (atmos_corr_sig0_ku)
sig0_c[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: C band corrected backscatter coefficient
    • standard_name: surface_backwards_scattering_coefficient_of_radar_wave
    • units: dB
    • quality_flag: qual_alt_1hz_sig0_c
    • scale_factor: 0.01000000000000000
    • coordinates: lon lat
    • comment: All instrumental corrections included, excepted the system bias, i.e. AGC instrumental errors correction, internal calibration correction (internal_corr_sig0_c), modeled instrumental errors correction (modeled_instr_corr_sig0_c) and atmospheric attenuation (atmos_corr_sig0_c)
sig0_20hz_c[ time= 0 ..3062] [ meas_ind= 0 ..19] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: 20 Hz C band corrected backscatter coefficient
    • standard_name: surface_backwards_scattering_coefficient_of_radar_wave
    • units: dB
    • scale_factor: 0.01000000000000000
    • coordinates: lon_20hz lat_20hz
    • comment: All instrumental corrections included, excepted the system bias, i.e. AGC instrumental errors correction, internal calibration correction (internal_corr_sig0_c), modeled instrumental errors correction (modeled_instr_corr_sig0_c) and atmospheric attenuation (atmos_corr_sig0_c)
sig0_used_20hz_ku[ time= 0 ..3062] [ meas_ind= 0 ..19] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: 20 Hz flag for utilization in the computation of 1Hz Ku band backscatter coefficient
    • flag_values: 0, 1
    • flag_meanings: yes no
    • coordinates: lon_20hz lat_20hz
    • comment: Map of valid points used to compute the 1-Hz Ku-band backscatter coefficient
sig0_used_20hz_c[ time= 0 ..3062] [ meas_ind= 0 ..19] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: 20 Hz flag for utilization in the computation of 1Hz C band backscatter coefficient
    • flag_values: 0, 1
    • flag_meanings: yes no
    • coordinates: lon_20hz lat_20hz
    • comment: Map of valid points used to compute the 1-Hz C-band backscatter coefficient
sig0_rms_ku[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: RMS of the Ku band backscatter coefficient
    • units: dB
    • scale_factor: 0.01000000000000000
    • coordinates: lon lat
    • comment: Compression of Ku-band high rate elements is preceded by a detection of outliers. Only valid high-rate values are used to compute this element
sig0_rms_c[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: RMS of the C band backscatter coefficient
    • units: dB
    • scale_factor: 0.01000000000000000
    • coordinates: lon lat
    • comment: Compression of C-band high rate elements is preceded by a detection of outliers. Only valid high-rate values are used to compute this element
sig0_numval_ku[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: number of valid points used to compute Ku backscatter coefficient
    • units: count
    • valid_min: 0
    • valid_max: 20
    • coordinates: lon lat
sig0_numval_c[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: number of valid points used to compute C backscatter coefficient
    • units: count
    • valid_min: 0
    • valid_max: 20
    • coordinates: lon lat
agc_ku[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: Ku band corrected AGC
    • units: dB
    • scale_factor: 0.01000000000000000
    • coordinates: lon lat
    • comment: AGC is corrected for instrumental errors due to the imperfections of the on-board attenuators
agc_c[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: C band corrected AGC
    • units: dB
    • scale_factor: 0.01000000000000000
    • coordinates: lon lat
    • comment: AGC is corrected for instrumental errors due to the imperfections of the on-board attenuators
agc_rms_ku[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: RMS of the Ku band AGC
    • units: dB
    • scale_factor: 0.01000000000000000
    • coordinates: lon lat
    • comment: Compression of Ku-band high rate elements is preceded by a detection of outliers. Only valid high-rate values are used to compute this element
agc_rms_c[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: RMS of the C band AGC
    • units: dB
    • scale_factor: 0.01000000000000000
    • coordinates: lon lat
    • comment: Compression of C-band high rate elements is preceded by a detection of outliers. Only valid high-rate values are used to compute this element
agc_numval_ku[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: number of valid points used to compute Ku band AGC
    • units: count
    • valid_min: 0
    • valid_max: 20
    • coordinates: lon lat
agc_numval_c[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: number of valid points used to compute C band AGC
    • units: count
    • valid_min: 0
    • valid_max: 20
    • coordinates: lon lat
net_instr_corr_sig0_ku[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: net instrumental correction on Ku backscatter coefficient
    • units: dB
    • quality_flag: qual_inst_corr_1hz_sig0_ku
    • scale_factor: 0.01000000000000000
    • coordinates: lon lat
    • comment: Sum of AGC instrumental errors correction, internal calibration correction (internal_corr_sig0_ku) and modeled instrumental errors correction (modeled_instr_corr_sig0_ku) - system bias not included
net_instr_corr_sig0_c[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: net instrumental correction on C backscatter coefficient
    • units: dB
    • quality_flag: qual_inst_corr_1hz_sig0_c
    • scale_factor: 0.01000000000000000
    • coordinates: lon lat
    • comment: Sum of AGC instrumental errors correction, internal calibration correction (internal_corr_sig0_c) and modeled instrumental errors correction (modeled_instr_corr_sig0_c) - system bias not included
atmos_corr_sig0_ku[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: atmospheric attenuation correction on Ku band backscatter coefficient
    • units: dB
    • scale_factor: 0.01000000000000000
    • coordinates: lon lat
atmos_corr_sig0_c[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: atmospheric attenuation correction on C band backscatter coefficient
    • units: dB
    • scale_factor: 0.01000000000000000
    • coordinates: lon lat
off_nadir_angle_wf_ku[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: square of the off nadir angle computed from Ku waveforms
    • units: degrees^2
    • quality_flag: qual_alt_1hz_off_nadir_angle_wf_ku
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
tb_187[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: 18.7 GHz main beam brightness temperature
    • standard_name: surface_brightness_temperature
    • units: K
    • quality_flag: qual_rad_1hz_tb187
    • scale_factor: 0.01000000000000000
    • coordinates: lon lat
    • comment: Brightness temperatures are unsmoothed (along-track averaging has not been performed on the brightness temperatures)
tb_238[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: 23.8 GHz main beam brightness temperature
    • standard_name: surface_brightness_temperature
    • units: K
    • quality_flag: qual_rad_1hz_tb238
    • scale_factor: 0.01000000000000000
    • coordinates: lon lat
    • comment: Brightness temperatures are unsmoothed (along-track averaging has not been performed on the brightness temperatures)
tb_340[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: 34.0 GHz main beam brightness temperature
    • standard_name: surface_brightness_temperature
    • units: K
    • quality_flag: qual_rad_1hz_tb340
    • scale_factor: 0.01000000000000000
    • coordinates: lon lat
    • comment: Brightness temperatures are unsmoothed (along-track averaging has not been performed on the brightness temperatures)
tb_187_smoothed[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: 18.7 GHz main beam smoothed brightness temperature
    • standard_name: surface_brightness_temperature
    • units: K
    • quality_flag: qual_rad_1hz_tb187
    • scale_factor: 0.01000000000000000
    • coordinates: lon lat
    • comment: Brightness temperatures are along-track averaged
tb_238_smoothed[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: 23.8 GHz main beam smoothed brightness temperature
    • standard_name: surface_brightness_temperature
    • units: K
    • quality_flag: qual_rad_1hz_tb238
    • scale_factor: 0.01000000000000000
    • coordinates: lon lat
    • comment: Brightness temperatures are along-track averaged
tb_340_smoothed[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: 34.0 GHz main beam smoothed brightness temperature
    • standard_name: surface_brightness_temperature
    • units: K
    • quality_flag: qual_rad_1hz_tb340
    • scale_factor: 0.01000000000000000
    • coordinates: lon lat
    • comment: Brightness temperatures are along-track averaged
mean_sea_surface[ time= 0 ..3062] (Grid of Int32 values)
  • attributes
    • _FillValue: 2147483647
    • long_name: mean sea surface height above reference ellipsoid
    • source: MSS_CNES_CLS-2011
    • institution: CLS/CNES
    • units: m
    • quality_flag: mean_sea_surface_err
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
    • comment: The mean sea surface height is referenced to a 20 years mean. See Jason-1 User Handbook.
mean_sea_surface_err[ time= 0 ..3062] (Grid of Int32 values)
  • attributes
    • _FillValue: 2147483647
    • long_name: calibrated error of mean sea surface
    • source: MSS_CNES_CLS-2011
    • institution: CLS/CNES
    • units: m
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
    • comment: See Jason-1 User Handbook
mean_topography[ time= 0 ..3062] (Grid of Int32 values)
  • attributes
    • _FillValue: 2147483647
    • long_name: mean dynamic topography above geoid
    • source: MDT_CNES_CLS-2013
    • institution: CLS/CNES
    • units: m
    • quality_flag: mean_topography_err
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
    • comment: The mean dynamic topography is referenced to a 20 years mean. See Jason-1 User Handbook.
mean_topography_err[ time= 0 ..3062] (Grid of Int32 values)
  • attributes
    • _FillValue: 2147483647
    • long_name: error on mean dynamic topography
    • source: MDT_CNES_CLS-2013
    • institution: CLS/CNES
    • units: m
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
    • comment: See Jason-1 User Handbook
geoid[ time= 0 ..3062] (Grid of Int32 values)
  • attributes
    • _FillValue: 2147483647
    • long_name: geoid height
    • standard_name: geoid_height_above_reference_ellipsoid
    • source: EGM2008
    • institution: National Geospatial-Intelligence Agency (NGA)
    • units: m
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
    • comment: Computed from the geoid model with a correction to refer the value to the mean tide system i.e. includes the permanent tide (zero frequency). See Jason-1 User Handbook
bathymetry[ time= 0 ..3062] (Grid of Int32 values)
  • attributes
    • _FillValue: 2147483647
    • long_name: ocean depth/land elevation
    • source: DTM2000.1
    • institution: GSFC
    • units: m
    • coordinates: lon lat
inv_bar_corr[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: inverted barometer height correction
    • standard_name: sea_surface_height_correction_due_to_air_pressure_at_low_frequency
    • source: European Center for Medium Range Weather Forecasting
    • institution: ECMWF
    • units: m
    • quality_flag:
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
    • comment: Computed at the altimeter time-tag from the interpolation of 2 meteorological fields that surround the altimeter time-tag. See Jason-1 User Handbook
hf_fluctuations_corr[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: high frequency fluctuations of the sea surface topography
    • standard_name: sea_surface_height_correction_due_to_air_pressure_and_wind_at_high_frequency
    • institution: LEGOS/CLS/CNES
    • units: m
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
    • comment: Provided as a correction to the inverted barometer correction (inv_bar_corr)
inv_bar_corr_era[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: inverted barometer height correction from ERA_Interim products
    • standard_name: sea_surface_height_correction_due_to_air_pressure_at_low_frequency
    • source: European Center for Medium Range Weather Forecasting
    • institution: ECMWF
    • units: m
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
    • comment: Courtesy of ECMWF as provider of met data for the atmospheric corrections. Computed at the altimeter time-tag from the interpolation of 2 meteorological fields that surround the altimeter time-tag. See Jason-1 User Handbook
hf_fluctuations_corr_era[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: high frequency fluctuations of the sea surface topography derived from ERA_Interim products
    • standard_name: sea_surface_height_correction_due_to_air_pressure_and_wind_at_high_frequency
    • institution: LEGOS/CLS/CNES
    • units: m
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
    • comment: Provided as a correction to the inverted barometer correction from ERA_Interim products (inv_bar_corr_era)
ocean_tide_sol1[ time= 0 ..3062] (Grid of Int32 values)
  • attributes
    • _FillValue: 2147483647
    • long_name: geocentric ocean tide height (solution 1)
    • standard_name: sea_surface_height_amplitude_due_to_geocentric_ocean_tide
    • source: GOT4.10
    • institution: GSFC
    • units: m
    • quality_flag: interp_flag_ocean_tide_sol1
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
    • comment: Solution 1 corresponds to GOT4.10 model. Includes the corresponding loading tide (load_tide_sol1) and equilibrium long-period ocean tide height (ocean_tide_equil). The permanent tide (zero frequency) is not included in this parameter because it is included in the geoid and mean sea surface (geoid, mean_sea_surface). See Jason-1 User Handbook
ocean_tide_sol2[ time= 0 ..3062] (Grid of Int32 values)
  • attributes
    • _FillValue: 2147483647
    • long_name: geocentric ocean tide height (solution 2)
    • standard_name: sea_surface_height_amplitude_due_to_geocentric_ocean_tide
    • source: FES2014
    • institution: LEGOS/CNES
    • units: m
    • quality_flag: interp_flag_ocean_tide_sol2
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
    • comment: Solution 2 corresponds to FES2014 model. Includes the corresponding loading tide (load_tide_sol2) and equilibrium long-period ocean tide height (ocean_tide_equil). The permanent tide (zero frequency) is not included in this parameter because it is included in the geoid and mean sea surface (geoid, mean_sea_surface). See Jason-1 User Handbook
ocean_tide_equil[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: equilibrium long-period ocean tide height
    • standard_name: sea_surface_height_amplitude_due_to_equilibrium_ocean_tide
    • source: Cartwright and Edden [1973] Corrected tables of tidal harmonics - J. Geophys. J. R. Astr. Soc., 33, 253-264.
    • units: m
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
    • comment: This value has already been added to the two geocentric ocean tide height values recorded in the product (ocean_tide_sol1 and ocean_tide_sol2). The permanent tide (zero frequency) is not included in this parameter because it is included in the geoid and mean sea surface (geoid, mean_sea_surface). See Jason-1 User Handbook
ocean_tide_non_equil[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: non-equilibrium long-period ocean tide height
    • standard_name: sea_surface_height_amplitude_due_to_non_equilibrium_ocean_tide
    • source: FES2014
    • institution: LEGOS/CNES
    • units: m
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
    • comment: This parameter is computed as a correction to the parameter ocean_tide_equil. This value can be added to ocean_tide_equil (or ocean_tide_sol1, ocean_tide_sol2) so that the resulting value models the total non equilibrium ocean tide height. See Jason-1 User Handbook
load_tide_sol1[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: load tide height for geocentric ocean tide (solution 1)
    • source: GOT4.10
    • institution: GSFC
    • units: m
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
    • comment: This value has already been added to the corresponding ocean tide height value recorded in the product (ocean_tide_sol1). See Jason-1 User Handbook
load_tide_sol2[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: load tide height for geocentric ocean tide (solution 2)
    • source: GOT4.8ac, tidal geocenter adjustement included
    • institution: GSFC
    • units: m
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
    • comment: This value has already been added to the corresponding ocean tide height value recorded in the product (ocean_tide_sol2). See Jason-1 User Handbook
solid_earth_tide[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: solid earth tide height
    • standard_name: sea_surface_height_amplitude_due_to_earth_tide
    • source: Cartwright and Edden [1973] Corrected tables of tidal harmonics - J. Geophys. J. R. Astr. Soc., 33, 253-264.
    • units: m
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
    • comment: Calculated using Cartwright and Tayler tables and consisting of the second and third degree constituents. The permanent tide (zero frequency) is not included. See Jason-1 User Handbook
pole_tide[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: geocentric pole tide height
    • standard_name: sea_surface_height_amplitude_due_to_pole_tide
    • source: Wahr [1985] Deformation of the Earth induced by polar motion - J. Geophys. Res. (Solid Earth), 90, 9363-9368.
    • units: m
    • scale_factor: 0.0001000000000000000
    • coordinates: lon lat
    • comment: See Jason-1 User Handbook
wind_speed_model_u[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: U component of the model wind vector
    • standard_name: wind_speed
    • source: European Center for Medium Range Weather Forecasting
    • institution: ECMWF
    • units: m/s
    • quality_flag:
    • scale_factor: 0.01000000000000000
    • coordinates: lon lat
    • comment: Computed at the altimeter time-tag from the interpolation of 2 meteorological fields that surround the altimeter time-tag. See Jason-1 User Handbook
wind_speed_model_v[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: V component of the model wind vector
    • standard_name: wind_speed
    • source: European Center for Medium Range Weather Forecasting
    • institution: ECMWF
    • units: m/s
    • quality_flag:
    • scale_factor: 0.01000000000000000
    • coordinates: lon lat
    • comment: Computed at the altimeter time-tag from the interpolation of 2 meteorological fields that surround the altimeter time-tag. See Jason-1 User Handbook
wind_speed_model_u_era[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: U component of the model wind vector from ERA_Interim products
    • standard_name: wind_speed
    • source: European Center for Medium Range Weather Forecasting
    • institution: ECMWF
    • units: m/s
    • scale_factor: 0.01000000000000000
    • coordinates: lon lat
    • comment: Courtesy of ECMWF. Computed at the altimeter time-tag from the interpolation of 2 meteorological fields that surround the altimeter time-tag. See Jason-1 User Handbook
wind_speed_model_v_era[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: V component of the model wind vector from ERA_Interim products
    • standard_name: wind_speed
    • source: European Center for Medium Range Weather Forecasting
    • institution: ECMWF
    • units: m/s
    • scale_factor: 0.01000000000000000
    • coordinates: lon lat
    • comment: Courtesy of ECMWF. Computed at the altimeter time-tag from the interpolation of 2 meteorological fields that surround the altimeter time-tag. See Jason-1 User Handbook
wind_speed_alt[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: altimeter wind speed
    • standard_name: wind_speed
    • units: m/s
    • scale_factor: 0.01000000000000000
    • coordinates: lon lat
    • comment: Should not be used over land. See Jason-1 User Handbook
wind_speed_rad[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: radiometer wind speed
    • standard_name: wind_speed
    • source: JMR
    • institution: NASA/JPL
    • units: m/s
    • scale_factor: 0.01000000000000000
    • coordinates: lon lat
    • comment: Should not be used over land. See Jason-1 User Handbook
rad_water_vapor[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: radiometer water vapor content
    • standard_name: atmosphere_water_vapor_content
    • source: JMR
    • institution: NASA/JPL
    • units: kg/m^2
    • quality_flag: qual_rad_1hz_tb187 and qual_rad_1hz_tb238 and qual_rad_1hz_tb340 and interp_flag_tb
    • scale_factor: 0.1000000000000000
    • coordinates: lon lat
    • comment: Should not be used over land.
rad_liquid_water[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: radiometer liquid water content
    • standard_name: atmosphere_cloud_liquid_water_content
    • source: JMR
    • institution: NASA/JPL
    • units: kg/m^2
    • quality_flag: qual_rad_1hz_tb187 and qual_rad_1hz_tb238 and qual_rad_1hz_tb340 and interp_flag_tb
    • scale_factor: 0.01000000000000000
    • coordinates: lon lat
    • comment: Should not be used over land.
ice_range_20hz_ku[ time= 0 ..3062] [ meas_ind= 0 ..19] (Grid of Int32 values)
  • attributes
    • _FillValue: 2147483647
    • long_name: 20 Hz Ku band altimeter range (ice retracking)
    • standard_name: altimeter_range
    • units: m
    • add_offset: 1300000.000000000
    • scale_factor: 0.0001000000000000000
    • coordinates: lon_20hz lat_20hz
    • comment: Distance antenna-COG (cog_corr), USO drift correction (uso_corr) and internal path correction (internal_path_delay_corr_ku) included
ice_range_20hz_c[ time= 0 ..3062] [ meas_ind= 0 ..19] (Grid of Int32 values)
  • attributes
    • _FillValue: 2147483647
    • long_name: 20 Hz C band altimeter range (ice retracking)
    • standard_name: altimeter_range
    • units: m
    • add_offset: 1300000.000000000
    • scale_factor: 0.0001000000000000000
    • coordinates: lon_20hz lat_20hz
    • comment: Distance antenna-COG (cog_corr), USO drift correction (uso_corr) and internal path correction (internal_path_delay_corr_c) included
ice_sig0_20hz_ku[ time= 0 ..3062] [ meas_ind= 0 ..19] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: 20 Hz Ku band backscatter coefficient (ice retracking)
    • standard_name: surface_backwards_scattering_coefficient_of_radar_wave
    • units: dB
    • scale_factor: 0.01000000000000000
    • coordinates: lon_20hz lat_20hz
    • comment: AGC instrumental errors correction and internal calibration correction (internal_corr_sig0_ku) included
ice_sig0_20hz_c[ time= 0 ..3062] [ meas_ind= 0 ..19] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: 20 Hz C band backscatter coefficient (ice retracking)
    • standard_name: surface_backwards_scattering_coefficient_of_radar_wave
    • units: dB
    • scale_factor: 0.01000000000000000
    • coordinates: lon_20hz lat_20hz
    • comment: AGC instrumental errors correction and internal calibration correction (internal_corr_sig0_c) included
ice_qual_flag_20hz_ku[ time= 0 ..3062] [ meas_ind= 0 ..19] (Grid of Int16 values)
  • attributes
    • _FillValue: 127
    • long_name: 20 Hz Ku band ice retracking quality flag
    • flag_values: 0, 1
    • flag_meanings: good bad
    • coordinates: lon_20hz lat_20hz
    • comment: ice retracking quality flag
mqe_20hz_ku[ time= 0 ..3062] [ meas_ind= 0 ..19] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: 20 Hz Ku band MQE (ocean retracking)
    • units: count
    • scale_factor: 0.0001000000000000000
    • coordinates: lon_20hz lat_20hz
    • comment: Mean Quadratic Error between the waveforms samples and the corresponding model samples built from the ocean retracking outputs
mqe_20hz_c[ time= 0 ..3062] [ meas_ind= 0 ..19] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: 20 Hz C band MQE (ocean retracking)
    • units: count
    • scale_factor: 0.0001000000000000000
    • coordinates: lon_20hz lat_20hz
    • comment: Mean Quadratic Error between the waveforms samples and the corresponding model samples built from the ocean retracking outputs
peakiness_20hz_ku[ time= 0 ..3062] [ meas_ind= 0 ..19] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: 20 Hz peakiness on Ku band waveforms
    • units: count
    • scale_factor: 0.001000000000000000
    • coordinates: lon_20hz lat_20hz
peakiness_20hz_c[ time= 0 ..3062] [ meas_ind= 0 ..19] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: 20 Hz peakiness on C band waveforms
    • units: count
    • scale_factor: 0.001000000000000000
    • coordinates: lon_20hz lat_20hz
ssha[ time= 0 ..3062] (Grid of Int16 values)
  • attributes
    • _FillValue: 32767
    • long_name: sea surface height anomaly
    • standard_name: sea_surface_height_above_sea_level
    • source: Poseidon-2
    • institution: CNES
    • units: m
    • scale_factor: 0.001000000000000000
    • coordinates: lon lat
    • comment: = altitude of satellite (alt) - Ku band corrected altimeter range (range_ku) - altimeter ionospheric correction on Ku band (iono_corr_alt_ku) - model dry tropospheric correction (model_dry_tropo_corr) - radiometer wet tropospheric correction (rad_wet_tropo_corr) - sea state bias correction in Ku band (sea_state_bias_ku) - solid earth tide height (solid_earth_tide) - geocentric ocean tide height solution 1 (ocean_tide_sol1) - geocentric pole tide height (pole_tide) - inverted barometer height correction (inv_bar_corr) - high frequency fluctuations of the sea surface topography (hf_fluctuations_corr for I/GDR off line products only) - mean sea surface (mean_sea_surface). Set to default if the altimeter surface type (surface_type) is set to 1, 2, or 3 (lake_enclosed_sea, ice, or land)

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