Please Note: This dataset is retired, and is displayed for archive purposes only, and may not reflect the most updated information.
However, a newer version exists.
SWOT Level 2 Nadir Altimeter Operational Geophysical Data Record with Waveforms Version D. DOI: https://doi.org/10.5067/SWOT-NALT-OGDR-D
For Version History information click here >>
However, a newer version exists.
SWOT Level 2 Nadir Altimeter Operational Geophysical Data Record with Waveforms Version D. DOI: https://doi.org/10.5067/SWOT-NALT-OGDR-D
For Version History information click here >>
SWOT Level 2 Nadir Altimeter Operational Geophysical Data Record with Waveforms, Version 1.0
(SWOT_L2_NALT_OGDR_1.0)| DOI | 10.5067/SWOT-NALT-OGDR-1.0 |
| Short Name | SWOT_L2_NALT_OGDR_1.0 |
| Description | The SWOT Level 2 Nadir Altimeter Operational Geophysical Data Record (OGDR) with Waveforms Version 1.0 dataset produced by the Surface Water and Ocean Topography (SWOT) mission provides sea surface height, significant wave height and wind speed measurements from the Poseidon-3C nadir altimeter, a Jason-class dual frequency (Ku/C) altimeter. SWOT is a joint mission between NASA and CNES that launched on December 16, 2022. It aims to measure ocean surface topography with unprecedented resolution and accuracy, as well as map inland water bodies globally. The OGDR dataset consists of discrete measurements along the nadir track with sampling resolutions of approximately 6-km and 300-m at 1Hz and 20Hz, respectively. The data were processed using the onboard DORIS orbit ephemeris, with predicted values for certain auxiliary data and no GIM ionosphere model values. The OGDR data are distributed as one file per data downlink in netCDF-4 file format with a nominal latency of < 7 hours. |
| Version | 1.0 |
| Dataset Type | DEPRECATED |
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
Please contact podaac@podaac.jpl.nasa.gov for more info.
| Name | Long Name | Unit |
|---|---|---|
| /data_01/alt_state_band_seq_flag | altimeter state flag: Ku/C band sequencing | |
| /data_01/altitude | 1 Hz altitude of satellite | m |
| /data_01/altitude_rate | 1 Hz orbital altitude rate | m/s |
| /data_01/angle_of_approach_to_coast | angle of approach to the coast | degrees |
| /data_01/c/agc | C band corrected AGC | dB |
| /data_01/c/agc_numval | number of valid points used to compute C band AGC | count |
| /data_01/c/agc_rms | RMS of the C band AGC | dB |
| /data_01/c/alt_state_band_status_flag | altimeter state flag: C band status | |
| /data_01/c/alt_state_c_band_flag | altimeter state flag: C bandwidth used | |
| /data_01/c/range_cor_ocean_net_instr | net instrumental correction on the C band range | m |
| /data_01/c/range_cor_ocean_net_instr_qual | quality flag for 1 Hz instrumental correction: C band range | |
| /data_01/c/range_ocean | 1 Hz C band corrected altimeter range | m |
| /data_01/c/range_ocean_compression_qual | quality flag for 1 Hz altimeter data: C band range | |
| /data_01/c/range_ocean_numval | number of valid points for C band range | count |
| /data_01/c/range_ocean_rms | RMS of the C band range | m |
| /data_01/c/sea_state_bias | sea state bias correction in C band | m |
| /data_01/c/sea_state_bias_adaptive | sea state bias correction in C band (adaptive retracking) | m |
| /data_01/c/sea_state_bias_mle3 | sea state bias correction in C band (MLE3 retracking) | m |
| /data_01/c/sig0_cor_atm | atmospheric attenuation correction on C band backscatter coefficient | dB |
| /data_01/c/sig0_cor_ocean_net_instr | net instrumental correction on C band backscatter coefficient | dB |
| /data_01/c/sig0_cor_ocean_net_instr_qual | quality flag for 1 Hz instrumental correction: C band backscatter coefficient | |
| /data_01/c/sig0_ocean | C band corrected backscatter coefficient | dB |
| /data_01/c/sig0_ocean_compression_qual | quality flag for 1 Hz altimeter data: C band backscatter coefficient | |
| /data_01/c/sig0_ocean_numval | number of valid points used to compute C band backscatter coefficient | count |
| /data_01/c/sig0_ocean_rms | RMS of the C band backscatter coefficient | dB |
| /data_01/c/swh_cor_ocean_net_instr | net instrumental correction on C band significant waveheight | m |
| /data_01/c/swh_cor_ocean_net_instr_qual | quality flag for 1 Hz instrumental correction: C band SWH | |
| /data_01/c/swh_ocean | C band corrected significant waveheight | m |
| /data_01/c/swh_ocean_compression_qual | quality flag for 1 Hz altimeter data: C band SWH | |
| /data_01/c/swh_ocean_numval | number of valid points used to compute C band significant waveheight | count |
| /data_01/c/swh_ocean_rms | RMS of the C band significant waveheight | m |
| /data_01/dac | dynamic atmospheric correction | m |
| /data_01/depth_or_elevation | ocean depth/land elevation | m |
| /data_01/distance_to_coast | distance to the coast | m |
| /data_01/geoid | geoid height | m |
| /data_01/ice_flag | ice flag | |
| /data_01/index_first_20hz_measurement | record counter of the first associated 20 Hz measurement | |
| /data_01/internal_tide_hret | internal tide height | m |
| /data_01/internal_tide_hret_interp_qual | internal tide interpolation flag | |
| /data_01/inv_bar_cor | inverted barometer height correction | m |
| /data_01/ku/agc | Ku band corrected AGC | dB |
| /data_01/ku/agc_numval | number of valid points used to compute Ku band AGC | count |
| /data_01/ku/agc_rms | RMS of the Ku band AGC | dB |
| /data_01/ku/alt_state_band_status_flag | altimeter state flag: Ku band status | |
| /data_01/ku/iono_cor_alt | altimeter ionospheric correction on Ku band | m |
| /data_01/ku/iono_cor_alt_adaptive | altimeter ionospheric correction on Ku band (adaptive retracking) | m |
| /data_01/ku/iono_cor_alt_filtered | filtered altimeter ionospheric correction on Ku band | m |
| /data_01/ku/iono_cor_alt_filtered_adaptive | filtered altimeter ionospheric correction on Ku band (adaptive retracking) | m |
| /data_01/ku/iono_cor_alt_filtered_adaptive_qual | filtered altimeter ionospheric correction quality flag (adaptive retracking) | |
| /data_01/ku/iono_cor_alt_filtered_mle3 | filtered altimeter ionospheric correction on Ku band (MLE3 retracking) | m |
| /data_01/ku/iono_cor_alt_filtered_mle3_qual | filtered altimeter ionospheric correction quality flag (MLE3 retracking) | |
| /data_01/ku/iono_cor_alt_filtered_qual | filtered altimeter ionospheric correction quality flag | |
| /data_01/ku/iono_cor_alt_mle3 | altimeter ionospheric correction on Ku band (MLE3 retracking) | m |
| /data_01/ku/iono_cor_gim | GIM ionospheric correction on Ku band | m |
| /data_01/ku/off_nadir_angle_wf_ocean | square of the off nadir angle computed from Ku band waveforms | degrees^2 |
| /data_01/ku/off_nadir_angle_wf_ocean_compression_qual | quality flag for 1 Hz altimeter data: off nadir angle from Ku band | |
| /data_01/ku/off_nadir_angle_wf_ocean_numval | number of valid points for square of the off nadir angle computed from Ku band waveforms | count |
| /data_01/ku/off_nadir_angle_wf_ocean_rms | RMS of the square of the off nadir angle computed from Ku band waveforms | degrees^2 |
| /data_01/ku/range_adaptive | 1 Hz Ku band corrected altimeter range (adaptive retracking) | m |
| /data_01/ku/range_adaptive_compression_qual | quality flag for 1 Hz altimeter data: Ku band range (adaptive retracking) | |
| /data_01/ku/range_adaptive_numval | number of valid points for Ku band range (adaptive retracking) | count |
| /data_01/ku/range_adaptive_rms | RMS of the Ku band range (adaptive retracking) | m |
| /data_01/ku/range_cor_adaptive_net_instr | net instrumental correction on the Ku band range (adaptive retracking) | m |
| /data_01/ku/range_cor_ocean_mle3_net_instr | net instrumental correction on the Ku band range (MLE3 retracking) | m |
| /data_01/ku/range_cor_ocean_net_instr | net instrumental correction on the Ku band range | m |
| /data_01/ku/range_cor_ocean_net_instr_qual | quality flag for 1 Hz instrumental correction: Ku band range | |
| /data_01/ku/range_ocean | 1 Hz Ku band corrected altimeter range | m |
| /data_01/ku/range_ocean_compression_qual | quality flag for 1 Hz altimeter data: Ku band range | |
| /data_01/ku/range_ocean_mle3 | 1 Hz Ku band corrected altimeter range (MLE3 retracking) | m |
| /data_01/ku/range_ocean_mle3_compression_qual | quality flag for 1 Hz altimeter data: Ku band range (MLE3 retracking) | |
| /data_01/ku/range_ocean_mle3_numval | number of valid points for Ku band range (MLE3 retracking) | count |
| /data_01/ku/range_ocean_mle3_rms | RMS of the Ku band range (MLE3 retracking) | m |
| /data_01/ku/range_ocean_numval | number of valid points for Ku band range | count |
| /data_01/ku/range_ocean_rms | RMS of the Ku band range | m |
| /data_01/ku/sea_state_bias | sea state bias correction in Ku band | m |
| /data_01/ku/sea_state_bias_3d_mp2 | sea state bias correction in Ku band computed from 3d model | m |
| /data_01/ku/sea_state_bias_adaptive | sea state bias correction in Ku band (adaptive retracking) | m |
| /data_01/ku/sea_state_bias_adaptive_3d_mp2 | sea state bias correction in Ku band computed from 3d model | m |
| /data_01/ku/sea_state_bias_mle3 | sea state bias correction in Ku band (MLE3 retracking) | m |
| /data_01/ku/sig0_adaptive | Ku band corrected backscatter coefficient (adaptive retracking) | dB |
| /data_01/ku/sig0_adaptive_compression_qual | quality flag for 1 Hz altimeter data: Ku band backscatter coefficient (adaptive retracking) | |
| /data_01/ku/sig0_adaptive_numval | number of valid points used to compute Ku band backscatter coefficient (adaptive retracking) | count |
| /data_01/ku/sig0_adaptive_rms | RMS of the Ku band backscatter coefficient (adaptive retracking) | dB |
| /data_01/ku/sig0_cor_adaptive_net_instr | net instrumental correction on Ku band backscatter coefficient (adaptive retracking) | dB |
| /data_01/ku/sig0_cor_atm | atmospheric attenuation correction on Ku band backscatter coefficient | dB |
| /data_01/ku/sig0_cor_ocean_mle3_net_instr | net instrumental correction on Ku band backscatter coefficient (MLE3 retracking) | dB |
| /data_01/ku/sig0_cor_ocean_net_instr | net instrumental correction on Ku band backscatter coefficient | dB |
| /data_01/ku/sig0_cor_ocean_net_instr_qual | quality flag for 1 Hz instrumental correction: Ku band backscatter coefficient | |
| /data_01/ku/sig0_ocean | Ku band corrected backscatter coefficient | dB |
| /data_01/ku/sig0_ocean_compression_qual | quality flag for 1 Hz altimeter data: Ku band backscatter coefficient | |
| /data_01/ku/sig0_ocean_mle3 | Ku band corrected backscatter coefficient (MLE3 retracking) | dB |
| /data_01/ku/sig0_ocean_mle3_compression_qual | quality flag for 1 Hz altimeter data: Ku band backscatter coefficient (MLE3 retracking) | |
| /data_01/ku/sig0_ocean_mle3_numval | number of valid points used to compute Ku band backscatter coefficient (MLE3 retracking) | count |
| /data_01/ku/sig0_ocean_mle3_rms | RMS of the Ku band backscatter coefficient (MLE3 retracking) | dB |
| /data_01/ku/sig0_ocean_numval | number of valid points used to compute Ku band backscatter coefficient | count |
| /data_01/ku/sig0_ocean_rms | RMS of the Ku band backscatter coefficient | dB |
| /data_01/ku/ssha | sea surface height anomaly | m |
| /data_01/ku/ssha_mle3 | sea surface height anomaly (MLE3 retracking) | m |
| /data_01/ku/swh_adaptive | Ku band corrected significant waveheight (adaptive retracking) | m |
| /data_01/ku/swh_adaptive_compression_qual | quality flag for 1 Hz altimeter data: Ku band SWH (adaptive retracking) | |
| /data_01/ku/swh_adaptive_numval | number of valid points used to compute Ku band significant waveheight (adaptive retracking) | count |
| /data_01/ku/swh_adaptive_rms | RMS of the Ku band significant waveheight (adaptive retracking) | m |
| /data_01/ku/swh_cor_adaptive_net_instr | net instrumental correction on Ku band significant waveheight (adaptive retracking) | m |
| /data_01/ku/swh_cor_ocean_mle3_net_instr | net instrumental correction on Ku band significant waveheight (MLE3 retracking) | m |
| /data_01/ku/swh_cor_ocean_net_instr | net instrumental correction on Ku band significant waveheight | m |
| /data_01/ku/swh_cor_ocean_net_instr_qual | quality flag for 1 Hz instrumental correction: Ku band SWH | |
| /data_01/ku/swh_ocean | Ku band corrected significant waveheight | m |
| /data_01/ku/swh_ocean_compression_qual | quality flag for 1 Hz altimeter data: Ku band SWH | |
| /data_01/ku/swh_ocean_mle3 | Ku band corrected significant waveheight (MLE3 retracking) | m |
| /data_01/ku/swh_ocean_mle3_compression_qual | quality flag for 1 Hz altimeter data: Ku band SWH (MLE3 retracking) | |
| /data_01/ku/swh_ocean_mle3_numval | number of valid points used to compute Ku band significant waveheight (MLE3 retracking) | count |
| /data_01/ku/swh_ocean_mle3_rms | RMS of the Ku band significant waveheight (MLE3 retracking) | m |
| /data_01/ku/swh_ocean_numval | number of valid points used to compute Ku band significant waveheight | count |
| /data_01/ku/swh_ocean_rms | RMS of the Ku band significant waveheight | m |
| /data_01/ku/wvf_main_class | 1 Hz Ku band waveform main class | |
| /data_01/latitude | latitude | degrees_north |
| /data_01/load_tide_fes | load tide height for geocentric ocean tide (FES solution) | m |
| /data_01/load_tide_got | load tide height for geocentric ocean tide (GOT solution) | m |
| /data_01/longitude | longitude | degrees_east |
| /data_01/mean_dynamic_topography | mean dynamic topography above geoid | m |
| /data_01/mean_dynamic_topography_interp_qual | MDT interpolation flag | |
| /data_01/mean_sea_surface_cnescls | mean sea surface height (CNES/CLS solution) above reference ellipsoid | m |
| /data_01/mean_sea_surface_cnescls_interp_qual | mean sea surface interpolation flag (CNES/CLS solution) | |
| /data_01/mean_sea_surface_dtu | mean sea surface height (DTU solution) above reference ellipsoid | m |
| /data_01/mean_sea_surface_dtu_interp_qual | mean sea surface interpolation flag (DTU solution) | |
| /data_01/mean_wave_direction | mean direction of the sea surface wave | degrees |
| /data_01/mean_wave_period_t02 | t02 mean wave period | s |
| /data_01/meteo_map_availability_flag | ECMWF meteorological map availability | |
| /data_01/meteo_measurement_altitude_interp_qual | meteorological data at measurement altitude interpolation flag | |
| /data_01/meteo_zero_altitude_interp_qual | meteorological data at zero altitude interpolation flag | |
| /data_01/model_dry_tropo_cor_measurement_altitude | model dry tropospheric correction at measurement altitude | m |
| /data_01/model_dry_tropo_cor_zero_altitude | model dry tropospheric correction at zero altitude | m |
| /data_01/model_wet_tropo_cor_measurement_altitude | model wet tropospheric correction at measurement altitude | m |
| /data_01/model_wet_tropo_cor_zero_altitude | model wet tropospheric correction at zero altitude | m |
| /data_01/numtotal_20hz_measurement | total number of 20 Hz measurements associated to the 1 Hz measurement | |
| /data_01/ocean_tide_eq | equilibrium long-period ocean tide height | m |
| /data_01/ocean_tide_fes | geocentric ocean tide height (FES solution) | m |
| /data_01/ocean_tide_fes_interp_qual | ocean tide interpolation flag (FES solution) | |
| /data_01/ocean_tide_got | geocentric ocean tide height (GOT solution) | m |
| /data_01/ocean_tide_got_interp_qual | ocean tide interpolation flag (GOT solution) | |
| /data_01/ocean_tide_non_eq | non-equilibrium long-period ocean tide height | m |
| /data_01/orb_state_diode_flag | orbit state flag: OGDR products | |
| /data_01/orb_state_rest_flag | orbit state flag: restituted orbit | |
| /data_01/pole_tide | geocentric pole tide height | m |
| /data_01/rad_cloud_liquid_water | radiometer liquid water content | kg/m^2 |
| /data_01/rad_side_1_distance_to_land | radiometer radial distance to land from first radiometer | m |
| /data_01/rad_side_1_land_frac_187 | radiometer 18.7 GHz antenna gain weighted land fraction in main beam from first radiometer | 1 |
| /data_01/rad_side_1_land_frac_238 | radiometer 23.8 GHz antenna gain weighted land fraction in main beam from first radiometer | 1 |
| /data_01/rad_side_1_land_frac_340 | radiometer 34 GHz antenna gain weighted land fraction in main beam from first radiometer | 1 |
| /data_01/rad_side_1_rain_flag | radiometer rain flag from first radiometer | |
| /data_01/rad_side_1_sea_ice_flag | radiometer sea-ice flag from first radiometer | |
| /data_01/rad_side_1_surface_type_flag | radiometer surface type from first radiometer | |
| /data_01/rad_side_2_distance_to_land | radiometer radial distance to land from second radiometer | m |
| /data_01/rad_side_2_land_frac_187 | radiometer 18.7 GHz antenna gain weighted land fraction in main beam from second radiometer | 1 |
| /data_01/rad_side_2_land_frac_238 | radiometer 23.8 GHz antenna gain weighted land fraction in main beam from second radiometer | 1 |
| /data_01/rad_side_2_land_frac_340 | radiometer 34 GHz antenna gain weighted land fraction in main beam from second radiometer | 1 |
| /data_01/rad_side_2_rain_flag | radiometer rain flag from second radiometer | |
| /data_01/rad_side_2_sea_ice_flag | radiometer sea-ice flag from second radiometer | |
| /data_01/rad_side_2_surface_type_flag | radiometer surface type from second radiometer | |
| /data_01/rad_tb_187 | 18.7 GHz main beam smoothed brightness temperature | K |
| /data_01/rad_tb_187_qual | quality flag for 1 Hz radiometer data: 18.7 GHz brightness temperature | |
| /data_01/rad_tb_238 | 23.8 GHz main beam smoothed brightness temperature | K |
| /data_01/rad_tb_238_qual | quality flag for 1 Hz radiometer data: 23.8 GHz brightness temperature | |
| /data_01/rad_tb_340 | 34 GHz main beam smoothed brightness temperature | K |
| /data_01/rad_tb_340_qual | quality flag for 1 Hz radiometer data: 34 GHz brightness temperature | |
| /data_01/rad_tmb_187 | 18.7 GHz main beam brightness temperature | K |
| /data_01/rad_tmb_238 | 23.8 GHz main beam brightness temperature | K |
| /data_01/rad_tmb_340 | 34 GHz main beam brightness temperature | K |
| /data_01/rad_water_vapor | radiometer water vapor content | kg/m^2 |
| /data_01/rad_wet_tropo_cor | radiometer wet tropospheric correction | m |
| /data_01/rad_wet_tropo_cor_interp_qual | radiometer wet tropospheric correction interpolation qualiy flag | |
| /data_01/rad_wind_speed | radiometer wind speed | m/s |
| /data_01/rain_flag | rain flag | |
| /data_01/rain_rate | model rain rate | mm/h |
| /data_01/sea_ice_concentration | sea ice concentration | 1 |
| /data_01/sea_ice_concentration_interp_qual | sea ice concentration data interpolation flag | |
| /data_01/sig0_cor_atm_source | data source for atmospheric attenuation computation | |
| /data_01/solid_earth_tide | solid earth tide height | m |
| /data_01/sst | sea surface temperature | K |
| /data_01/surface_classification_flag | surface classification | |
| /data_01/surface_slope_cor | surface slope correction | m |
| /data_01/time | time in UTC | seconds since 2000-01-01 00:00:00.0 |
| /data_01/time_tai | time in TAI | seconds since 2000-01-01 00:00:00.0 |
| /data_01/wave_model_interp_qual | wave model data interpolation flag | |
| /data_01/wave_model_map_availability_flag | wave model map availability | |
| /data_01/wind_speed_alt | altimeter wind speed | m/s |
| /data_01/wind_speed_alt_adaptive | altimeter wind speed (adaptive retracking) | m/s |
| /data_01/wind_speed_alt_mle3 | altimeter wind speed (MLE3 retracking) | m/s |
| /data_01/wind_speed_mod_u | U component of the model wind vector | m/s |
| /data_01/wind_speed_mod_v | V component of the model wind vector | m/s |
| /data_20/alt_state_acq_mode_flag | 20 Hz altimeter state flag: operational acquisition mode | |
| /data_20/alt_state_track_trans_flag | 20 Hz altimeter state flag: tracking automatic transition | |
| /data_20/altitude | 20 Hz altitude of satellite | m |
| /data_20/angle_of_approach_to_coast | 20 Hz angle of approach to the coast | degrees |
| /data_20/c/ice2_qual | 20 Hz C band ice-2 retracking quality flag | |
| /data_20/c/mqe_ice2 | 20 Hz C band MQE (ice-2 retracking) | 1 |
| /data_20/c/mqe_ocean | 20 Hz C band MQE (ocean retracking) | 1 |
| /data_20/c/num_iterations_ocean | 20 Hz number of iterations of the ocean retracking in C band | count |
| /data_20/c/peakiness | 20 Hz peakiness on C band waveforms | 1 |
| /data_20/c/range_ice2 | 20 Hz C band altimeter range (ice-2 retracking) | m |
| /data_20/c/range_ocean | 20 Hz C band corrected altimeter range | m |
| /data_20/c/range_ocean_compression_qual | 20 Hz flag for utilization in the computation of 1 Hz C band range | |
| /data_20/c/range_ocog | 20 Hz C band altimeter range (OCOG retracking) | m |
| /data_20/c/sig0_ice2 | 20 Hz C band backscatter coefficient (ice-2 retracking) | dB |
| /data_20/c/sig0_leading_edge_ice2 | 20 Hz C band leading edge backscatter coefficient (ice-2 retracking) | dB |
| /data_20/c/sig0_ocean | 20 Hz C band corrected backscatter coefficient | dB |
| /data_20/c/sig0_ocean_compression_qual | 20 Hz flag for utilization in the computation of 1 Hz C band backscatter coefficient | |
| /data_20/c/sig0_ocog | 20 Hz C band backscatter coefficient (OCOG retracking) | dB |
| /data_20/c/sigmal_ice2 | 20 Hz width of the C band leading edge (ice-2 retracking) | m |
| /data_20/c/slope1_ice2 | 20 Hz slope of the first part of the logarithm of the C band trailing edge (ice-2 retracking) | s-1 |
| /data_20/c/slope2_ice2 | 20 Hz slope of the second part of the logarithm of the C band trailing edge (ice-2 retracking) | s-1 |
| /data_20/c/swh_ocean | 20 Hz C band corrected significant waveheight | m |
| /data_20/c/swh_ocean_compression_qual | 20 Hz flag for utilization in the computation of 1 Hz C band significant waveheight | |
| /data_20/distance_to_coast | 20 Hz distance to the coast | m |
| /data_20/index_1hz_measurement | record counter of the associated 1 Hz measurement | |
| /data_20/ku/ice2_qual | 20 Hz Ku band ice-2 retracking quality flag | |
| /data_20/ku/mqe_adaptive | 20 Hz Ku band MQE (adaptive retracking) | 1 |
| /data_20/ku/mqe_ice2 | 20 Hz Ku band MQE (ice-2 retracking) | 1 |
| /data_20/ku/mqe_ocean | 20 Hz Ku band MQE (ocean retracking) | 1 |
| /data_20/ku/mqe_ocean_mle3 | 20 Hz Ku band MQE (MLE3 retracking) | 1 |
| /data_20/ku/num_iterations_adaptive | 20 Hz number of iterations of the adaptive retracking in Ku band | count |
| /data_20/ku/num_iterations_ocean | 20 Hz number of iterations of the ocean retracking in Ku band | count |
| /data_20/ku/num_iterations_ocean_mle3 | 20 Hz number of iterations of the ocean retracking in Ku band (MLE3 retracking) | count |
| /data_20/ku/ocog_qual | 20 Hz Ku band OCOG retracking quality flag | |
| /data_20/ku/off_nadir_angle_wf_ocean | 20 Hz square of the off nadir angle computed from Ku band waveforms | degrees^2 |
| /data_20/ku/off_nadir_angle_wf_ocean_compression_qual | 20 Hz flag for utilization in the computation of 1 Hz square of the off nadir angle computed from Ku band waveforms | |
| /data_20/ku/peakiness | 20 Hz peakiness on Ku band waveforms | 1 |
| /data_20/ku/range_adaptive | 20 Hz Ku band corrected altimeter range (adaptive retracking) | m |
| /data_20/ku/range_adaptive_compression_qual | 20 Hz flag for utilization in the computation of 1 Hz Ku band range (adaptive retracking) | |
| /data_20/ku/range_ice2 | 20 Hz Ku band altimeter range (ice-2 retracking) | m |
| /data_20/ku/range_ocean | 20 Hz Ku band corrected altimeter range | m |
| /data_20/ku/range_ocean_compression_qual | 20 Hz flag for utilization in the computation of 1 Hz Ku band range | |
| /data_20/ku/range_ocean_mle3 | 20 Hz Ku band corrected altimeter range (MLE3 retracking) | m |
| /data_20/ku/range_ocean_mle3_compression_qual | 20 Hz flag for utilization in the computation of 1 Hz Ku band range (MLE3 retracking) | |
| /data_20/ku/range_ocog | 20 Hz Ku band altimeter range (OCOG retracking) | m |
| /data_20/ku/range_seaice | 20 Hz Ku band altimeter range (sea-ice retracking) | m |
| /data_20/ku/range_tfmra | 20 Hz Ku band altimeter range (TFMRA retracking) | m |
| /data_20/ku/seaice_qual | 20 Hz Ku band sea-ice retracking quality flag | |
| /data_20/ku/sig0_adaptive | 20 Hz Ku band corrected backscatter coefficient (adaptive retracking) | dB |
| /data_20/ku/sig0_adaptive_compression_qual | 20 Hz flag for utilization in the computation of 1 Hz Ku band backscatter coefficient (adaptive retracking) | |
| /data_20/ku/sig0_ice2 | 20 Hz Ku band backscatter coefficient (ice-2 retracking) | dB |
| /data_20/ku/sig0_leading_edge_ice2 | 20 Hz Ku band leading edge backscatter coefficient (ice-2 retracking) | dB |
| /data_20/ku/sig0_ocean | 20 Hz Ku band corrected backscatter coefficient | dB |
| /data_20/ku/sig0_ocean_compression_qual | 20 Hz flag for utilization in the computation of 1 Hz Ku band backscatter coefficient | |
| /data_20/ku/sig0_ocean_mle3 | 20 Hz Ku band corrected backscatter coefficient (MLE3 retracking) | dB |
| /data_20/ku/sig0_ocean_mle3_compression_qual | 20 Hz flag for utilization in the computation of 1 Hz Ku band backscatter coefficient (MLE3 retracking) | |
| /data_20/ku/sig0_ocog | 20 Hz Ku band backscatter coefficient (OCOG retracking) | dB |
| /data_20/ku/sig0_seaice | 20 Hz Ku band backscatter coefficient (sea-ice retracking) | dB |
| /data_20/ku/sig0_tfmra | 20 Hz Ku band backscatter coefficient (TFMRA retracking) | dB |
| /data_20/ku/sigmal_ice2 | 20 Hz width of the Ku band leading edge (ice-2 retracking) | m |
| /data_20/ku/slope1_ice2 | 20 Hz slope of the first part of the logarithm of the Ku band trailing edge (ice-2 retracking) | s-1 |
| /data_20/ku/slope2_ice2 | 20 Hz slope of the second part of the logarithm of the Ku band trailing edge (ice-2 retracking) | s-1 |
| /data_20/ku/swh_adaptive | 20 Hz Ku band corrected significant waveheight (adaptive retracking) | m |
| /data_20/ku/swh_adaptive_compression_qual | 20 Hz flag for utilization in the computation of 1 Hz Ku band significant waveheight (adaptive retracking) | |
| /data_20/ku/swh_ocean | 20 Hz Ku band corrected significant waveheight | m |
| /data_20/ku/swh_ocean_compression_qual | 20 Hz flag for utilization in the computation of 1 Hz Ku band significant waveheight | |
| /data_20/ku/swh_ocean_mle3 | 20 Hz Ku band corrected significant waveheight (MLE3 retracking) | m |
| /data_20/ku/swh_ocean_mle3_compression_qual | 20 Hz flag for utilization in the computation of 1 Hz Ku band significant waveheight (MLE3 retracking) | |
| /data_20/ku/tfmra_qual | 20 Hz Ku band TFMRA retracking quality flag | |
| /data_20/ku/wvf_main_class | 20 Hz Ku band waveform main class | |
| /data_20/latitude | 20 Hz latitude | degrees_north |
| /data_20/longitude | 20 Hz longitude | degrees_east |
| /data_20/meteo_measurement_altitude_interp_qual | 20 Hz meteorological data at measurement altitude interpolation flag | |
| /data_20/model_dry_tropo_cor_measurement_altitude | 20 Hz model dry tropospheric correction at measurement altitude | m |
| /data_20/model_wet_tropo_cor_measurement_altitude | 20 Hz model wet tropospheric correction at measurement altitude | m |
| /data_20/surface_classification_flag | 20 Hz surface classification | |
| /data_20/surface_slope_cor | surface slope correction | m |
| /data_20/time | time 20 Hz in UTC | seconds since 2000-01-01 00:00:00.0 |
| /data_20/time_tai | time 20 Hz in TAI | seconds since 2000-01-01 00:00:00.0 |
Citation is critically important for dataset documentation and discovery. Please cite the data as follows, and cite the reference papers when it is appropriate.
| Citation | Surface Water Ocean Topography (SWOT). 2023. SWOT Level 2 Nadir Altimeter Operational Geophysical Data Record with Waveforms. Ver. 1.0. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/SWOT-NALT-OGDR-1.0
For more information see Data Citations and Acknowledgments.
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| Journal Reference | Shailen Desai, 2018. Surface Water and Ocean Topography Mission (SWOT) Project: Science Requirements Document. Jet Propulsion Laboratory, JPL D-61923, Rev. B. https://swot.jpl.nasa.gov/system/documents/files/2176_2176_D-61923_SRD_Rev_B_20181113.pdf . |
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| Version | Dataset | Version Date | Status | |
|---|---|---|---|---|
| D | SWOT Level 2 Nadir Altimeter Operational Geophysical Data Record with Waveforms Version D | 2023-05-04 | ACTIVE | 2023-05-04T20:26:00.000Z |
| 2.0 | SWOT Level 2 Nadir Altimeter Operational Geophysical Data Record with Waveforms | 2023-05-04 | SUPERSEDED | 2023-05-04T20:26:00.000Z |
| 1.0 | SWOT Level 2 Nadir Altimeter Operational Geophysical Data Record with Waveforms, Version 1.0 | 2023-05-04 | RETIRED. | 2023-05-04T20:26:00.000Z |