N: 66.15 S: -66.15 E: 180 W: -180
Description
Provides L2 near real time (NRT; 3-hour latency) geophysical information from the Advanced Microwave Radiometer on the Sentinel-6B spacecraft including surface type, wind speed, water vapor, brightness temperature, sigma0, wet troposphere, and associated quality flags. The data are interpolated to intervals that correspond to altimetry measurements from the Poseidon-4 SAR to supply the geophysical and environmental corrections for altimetry. The S6B NRT product is analogous to the Jason-3 OGDR product.
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Variables
The table below lists the variables contained within a single granule for this dataset. Variables often contain observed or derived geophysical measurements collected from a variety of sources, including remote sensing instruments on satellite and airborne platforms, field campaigns, in situ measurements, and model outputs. The terms variable, parameter, scientific data set, layer, and band have been used across NASA’s Earth science disciplines; however, variable is the designated nomenclature in NASA’s Common Metadata Repository (CMR). Variable metadata attributes such as Name, Description, Units, Data Type, Fill Value, Valid Range, and Scale Factor allow users to efficiently process and analyze the data. The full range of attributes may not be applicable to all variables. Additional information on variable attributes is typically available in the data, user guide, and/or other product documentation.
For questions on a specific variable, please use the Earthdata Forum.
| Name Sort descending | Description | Units | Data Type | Fill Value | Valid Range | Scale Factor | Offset |
|---|---|---|---|---|---|---|---|
| amr_rain_flag | Flag indicating if AMR measurement is impacted by rain contamination. | N/A | byte | 127 | 0 to 1 | 1 | N/A |
| amr_sea_ice_flag | Flag indicating if AMR measurement is impacted by sea ice contamination. | N/A | byte | 127 | 0 to 1 | 1 | N/A |
| amr_surface_type_flag | Flag indicating the validity and type of processing applied to generate the AMR wet troposphere correction (amr_wet_tropo_cor). A value of 0 indicates that open ocean processing is used, a value of 1 indicates coastal processing is used, and a value of 2 indicates that amr_wet_tropo_cor is invalid due to land contamination. | N/A | byte | 127 | 0 to 2 | 1 | N/A |
| amr_wet_tropo_cor | Value must be added to altimeter range to correct for delay due to the wet troposphere. Computed from AMR measurements alone. | m | short | 32767 | -10000 0 | 0.0001 | N/A |
| amr_wet_tropo_cor_qual | Quality flag for radiometer wet troposphere correction computed from AMR data alone. | N/A | byte | 127 | 0 to 1 | 1 | N/A |
| hrmr_pointing_flag | Flag indicating if the HRMR beam pointing vector is taken into account to determine the position of the measurement before combining with AMR-C measurements. A value of 0 indicates that the position of the HRMR measurement is computed using the HRMR beam pointing vector, a value of 1 indicates the position of the HRMR measurement is set to the AMR measurement position, and a value of 2 indicates that the position of the HRMR measurement is not computed because orbit information is not available. | N/A | byte | 127 | 0 to 2 | 1 | N/A |
| hrmr_rain_flag | Flag indicating if HRMR measurement is impacted by rain contamination. | N/A | byte | 127 | 0 to 1 | 1 | N/A |
| hrmr_sea_ice_flag | Flag indicating if HRMR measurement is impacted by sea ice contamination. | N/A | byte | 127 | 0 to 1 | 1 | N/A |
| hrmr_surface_type_flag | Flag indicating the validity and type of processing applied to generate the HRMR contribution to the wet troposphere correction (rad_wet_tropo_cor). A value of 0 indicates that open ocean processing is used, a value of 1 indicates coastal processing is used, and a value of 2 indicates that HRMR geophysical retrievals are invalid due to land contamination. | N/A | byte | 127 | 0 to 2 | 1 | N/A |
| latitude | Latitude of measurement [-90, 90]. Positive latitude is North latitude, negative latitude is South latitude. | degrees_north | int | 2147483647 | -80000000 to 80000000 | 1.0E-6 | N/A |
| longitude | Longitude of measurement [0,360]. East longitude relative to Greenwich meridian. | degrees_east | int | 2147483647 | 0 to 359999999 | 1.0E-6 | N/A |
| rad_atm_cor_sig0_c | Value must be added to altimeter backscatter coefficient to correct for atmospheric attenuation. | dB | short | 32767 | 0 to 32766 | 0.001 | N/A |
| rad_atm_cor_sig0_c_qual | Quality flag for radiometer two-way atmospheric correction to C band backscatter coefficient. | N/A | byte | 127 | 0 to 1 | 1 | N/A |
| rad_atm_cor_sig0_ku | Value must be added to altimeter backscatter coefficient to correct for atmospheric attenuation. | dB | short | 32767 | 0 to 32766 | 0.001 | N/A |
| rad_atm_cor_sig0_ku_qual | Quality flag for radiometer two-way atmospheric correction to Ku band backscatter coefficient. | N/A | byte | 127 | 0 to 1 | 1 | N/A |
| rad_cloud_liquid_water | Integrated cloud liquid water content. | kg/m^2 | short | 32767 | 0 to 32766 | 0.01 | N/A |
| rad_cloud_liquid_water_qual | Quality flag for radiometer cloud liquid water content. | N/A | byte | 127 | 0 to 1 | 1 | N/A |
| rad_coordinates_qual | Quality flag for the latitude and longitude coordinates. A value of 0 indicates that the latitude and longitude coordinates are computed using orbit and attitude information, a value of 1 indicates they are computed without attitude information and reflect nadir coordinates, and a value of 2 indicates that they are not computed because orbit information is not available. | N/A | byte | 127 | 0 to 2 | 1 | N/A |
| rad_distance_to_land | Shortest distance between main beam measurement and land. | m | int | 2147483647 | 0 to 2147483646 | 100 | N/A |
| rad_land_frac_090 | Fraction of land within the 90 GHz main beam. Value is from 0 to 1. | 1 | short | 32767 | 0 to 10000 | 0.0001 | N/A |
| rad_land_frac_130 | Fraction of land within the 130 GHz main beam. Value is from 0 to 1. | 1 | short | 32767 | 0 to 10000 | 0.0001 | N/A |
| rad_land_frac_166 | Fraction of land within the 166 GHz main beam. Value is from 0 to 1. | 1 | short | 32767 | 0 to 10000 | 0.0001 | N/A |
| rad_land_frac_187 | Fraction of land within the 18.7 GHz main beam. Value is from 0 to 1. | 1 | short | 32767 | 0 to 10000 | 0.0001 | N/A |
| rad_land_frac_238 | Fraction of land within the 23.8 GHz main beam. Value is from 0 to 1. | 1 | short | 32767 | 0 to 10000 | 0.0001 | N/A |
| rad_land_frac_340 | Fraction of land within the 34.0 GHz main beam. Value is from 0 to 1. | 1 | short | 32767 | 0 to 10000 | 0.0001 | N/A |
| rad_rain_flag | Flag indicating if radiometer measurements from combination of AMR and HRMR data are invalid due to rain contamination. | N/A | byte | 127 | 0 to 1 | 1 | N/A |
| rad_sea_ice_flag | Flag indicating if radiometer measurements from combination of AMR and HRMR data are invalid due to sea ice contamination. | N/A | byte | 127 | 0 to 1 | 1 | N/A |
| rad_state_oper_flag | Flag indicating operating state of radiometer. A value of 0 indicates nominal science measurements from the instrument. | N/A | byte | 127 | 0 to 1 | 1 | N/A |
| rad_surface_type_flag | Flag indicating the validity and type of processing applied to generate the wet troposphere correction (rad_wet_tropo_cor) from a combination of AMR and HRMR data. A value of 0 indicates open ocean processing, a value of 1 indicates nominal coastal processing, a value of 2 indicates coastal processing with only AMR data, and a value of 3 indicates that rad_wet_trop_cor is invalid due to land contamination. | N/A | byte | 127 | 0 to 3 | 1 | N/A |
| rad_ta_090 | Antenna temperature measurement at 90 GHz. | K | int | 2147483647 | 0 to 36000 | 0.01 | N/A |
| rad_ta_090_qual | Quality flag for 90 GHz antenna temperature. | N/A | byte | 127 | 0 to 1 | 1 | N/A |
| rad_ta_130 | Antenna temperature measurement at 130 GHz. | K | int | 2147483647 | 0 to 36000 | 0.01 | N/A |
| rad_ta_130_qual | Quality flag for 130 GHz antenna temperature. | N/A | byte | 127 | 0 to 1 | 1 | N/A |
| rad_ta_166 | Antenna temperature measurement at 166 GHz. | K | int | 2147483647 | 0 to 36000 | 0.01 | N/A |
| rad_ta_166_qual | Quality flag for 166 GHz antenna temperature. | N/A | byte | 127 | 0 to 1 | 1 | N/A |
| rad_ta_187 | Antenna temperature measurement at 18.7 GHz. | K | int | 2147483647 | 0 to 36000 | 0.01 | N/A |
| rad_ta_187_qual | Quality flag for 18.7 GHz antenna temperature. | N/A | byte | 127 | 0 to 1 | 1 | N/A |
| rad_ta_238 | Antenna temperature measurement at 23.8 GHz. | K | int | 2147483647 | 0 to 36000 | 0.01 | N/A |
| rad_ta_238_qual | Quality flag for 23.8 GHz antenna temperature. | N/A | byte | 127 | 0 to 1 | 1 | N/A |
| rad_ta_340 | Antenna temperature measurement at 34.0 GHz. | K | int | 2147483647 | 0 to 36000 | 0.01 | N/A |
| rad_ta_340_qual | Quality flag for 34.0 GHz antenna temperature. | N/A | byte | 127 | 0 to 1 | 1 | N/A |
| rad_tb_187 | Equalized brightness temperature measurement at 18.7 GHz. Value is smoothed (along-track averaging has been performed). | K | int | 2147483647 | 0 to 36000 | 0.01 | N/A |
| rad_tb_187_qual | Quality flag for 18.7 GHz equalized brightness temperature. | N/A | byte | 127 | 0 to 1 | 1 | N/A |
| rad_tb_238 | Equalized brightness temperature measurement at 23.8 GHz. Value is smoothed (along-track averaging has been performed). | K | int | 2147483647 | 0 to 36000 | 0.01 | N/A |
| rad_tb_238_qual | Quality flag for 23.8 GHz equalized brightness temperature. | N/A | byte | 127 | 0 to 1 | 1 | N/A |
| rad_tb_340 | Equalized brightness temperature measurement at 34.0 GHz. Value is smoothed (along-track averaging has been performed). | K | int | 2147483647 | 0 to 36000 | 0.01 | N/A |
| rad_tb_340_qual | Quality flag for 34.0 GHz equalized brightness temperature. | N/A | byte | 127 | 0 to 1 | 1 | N/A |
| rad_tmb_090 | Main beam brightness temperature measurement at 90 GHz. Value is unsmoothed (along-track averaging has not been performed). | K | int | 2147483647 | 0 to 36000 | 0.01 | N/A |
| rad_tmb_090_qual | Quality flag for 90 GHz main beam brightness temperature. | N/A | byte | 127 | 0 to 1 | 1 | N/A |
| rad_tmb_130 | Main beam brightness temperature measurement at 130 GHz. Value is unsmoothed (along-track averaging has not been performed). | K | int | 2147483647 | 0 to 36000 | 0.01 | N/A |