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Description

High rate data processed to single-look complex SAR images for each antenna. Gridded tile (approx 64x64 km2); half swath (left or right side of full swath). Available in netCDF-4 file format.<br>
Please note that this collection contains SWOT Version C science data products.

Product Summary

Platforms
SWOT
Instruments
KaRIn ,
Jason-class Altimeter ,
AMR ,
DORIS ,
GPSP ,
LRA
Spatial Extent

N: 90 S: -90 E: 180 W: -180

Geographic Region
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
GEODETIC
Temporal Extent
2022-12-16
Data Partner
Physical Oceanography Distributed Active Archive Center, Jet Propulsion Laboratory, NASA (NASA/JPL/PODAAC)
Concept ID
C2799438119-POCLOUD
Data State
SUPERSEDED
Number of Files/Granules
3054523
Processing Level
1B
Published
Updated
Science Keywords
RADAR IMAGERY

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

SWOT. (2024). SWOT Level 1B High-Rate Single-look Complex Data Product [Data set]. NASA Physical Oceanography Distributed Active Archive Center. https://doi.org/10.5067/SWOT-SLC-2.0 Date Accessed: 2025-12-14

Documents

Variables

Variables are a set of physical properties whose values determine the characteristics or behavior of something. For example, temperature and pressure are variables of the atmosphere. Parameters and variables can be used interchangeably. Variable level attributes provide individual information for each variable.

The Name in this table is the variable name. Fill value indicates missing or undefined data points in a variable. Valid range is the range of values the variable can store. Scale factor is used to increase or decrease the size of an object and can be used to correct for distortion. For questions on a specific variable, please use the Earthdata Forum.

Name Description Units Data Type Fill Value Valid Range Scale Factor
/grdem/height Local DEM height of the Earth surface relative to the reference ellipsoid. m float 9.96921E+36 -1500 to 15000 1
/grdem/platform_altitude Altitude of the KMSF orgin relative to the reference ellipsoid for each cross-track line of the GrDEM. m float 9.96921E+36 800000 to 1000000 1
/grdem/platform_latitude Geodetic latitude (positive N, negative S) relative to the reference ellipsoid along the nadir track for each cross-track line of the GrDEM. degrees_north double 9.9692099683869E+36 -80 to 80 1
/grdem/platform_longitude Longitude (east of the Greenwich meridian) along the nadir track for each cross-track line of the GrDEM. degrees_east double 9.9692099683869E+36 -180 to 180 1
/grdem/platform_time UTC time that the spacecraft flew over each cross-track line of the GrDEM. seconds since 2000-01-01 00:00:00.000 double 9.9692099683869E+36 N/A 1
/grdem/platform_time_tai TAI time that the spacecraft flew over each cross-track line of the GrDEM. seconds since 2000-01-01 00:00:00.000 double 9.9692099683869E+36 N/A 1
/grdem/platform_velocity_x x component of the KMSF origin velocity in the ECEF frame for each cross-track line of the GrDEM. m/s double 9.9692099683869E+36 -10000 to 10000 1
/grdem/platform_velocity_y y component of the KMSF origin velocity in the ECEF frame for each cross-track line of the GrDEM. m/s double 9.9692099683869E+36 -10000 to 10000 1
/grdem/platform_velocity_z z component of the KMSF origin velocity in the ECEF frame for each cross-track line of the GrDEM. m/s double 9.9692099683869E+36 -10000 to 10000 1
/noise/noise_minus_y Noise power for the minus_y channel expressed in linear units (arbitrary units that give noise-equivalent sigma0 when normalized by the X factor). 1 float 9.96921E+36 0 to 1.0E+20 1
/noise/noise_plus_y Noise power for the plus_y channel expressed in linear units (arbitrary units that give noise-equivalent sigma0 when normalized by the X factor). 1 float 9.96921E+36 0 to 1.0E+20 1
/slc/slc_minus_y SLC complex image for the minus_y channel (arbitrary scaling consistent with the X factor). 1 float 9.96921E+36 -1.0E+20 to 1.0E+20 1
/slc/slc_plus_y SLC complex image for the plus_y channel (arbitrary scaling consistent with the X factor). 1 float 9.96921E+36 -1.0E+20 to 1.0E+20 1
/slc/slc_qual Flag indicating conditions that may affect the quality of the SLC data. N/A ubyte 255 0 to 231 1
/tvp/altitude Altitude above the reference ellipsoid of the KMSF origin. m double 9.9692099683869E+36 0 to 1000000 1
/tvp/latitude Geodetic latitude of the KMSF origin with respect to the reference ellipsoid. degrees_north double 9.9692099683869E+36 -80 to 80 1
/tvp/longitude Longitude of the KMSF origin, with positive values indicating longitudes east of the Greenwich meridian. degrees_east double 9.9692099683869E+36 -180 to 180 1
/tvp/minus_y_antenna_x x coordinate of the minus_y antenna phase center in the ECEF frame. m double 9.9692099683869E+36 -10000000 to 10000000 1
/tvp/minus_y_antenna_y y coordinate of the minus_y antenna phase center in the ECEF frame. m double 9.9692099683869E+36 -10000000 to 10000000 1
/tvp/minus_y_antenna_z z coordinate of the minus_y antenna phase center in the ECEF frame. m double 9.9692099683869E+36 -10000000 to 10000000 1
/tvp/pitch KMSF attitude pitch angle; positive values move the KMSF +x axis up. degrees double 9.9692099683869E+36 -180 to 180 1
/tvp/plus_y_antenna_x x coordinate of the plus_y antenna phase center in the ECEF frame. m double 9.9692099683869E+36 -10000000 to 10000000 1
/tvp/plus_y_antenna_y y coordinate of the plus_y antenna phase center in the ECEF frame. m double 9.9692099683869E+36 -10000000 to 10000000 1
/tvp/plus_y_antenna_z z coordinate of the plus_y antenna phase center in the ECEF frame. m double 9.9692099683869E+36 -10000000 to 10000000 1
/tvp/record_counter Index of the TVP record used to align data samples across granules. 1 int 2147483647 1 to 999999999 1
/tvp/roll KMSF attitude roll angle; positive values move the +y antenna down. degrees double 9.9692099683869E+36 -180 to 180 1
/tvp/sc_event_flag Flag indicating spacecraft events that may affect the characteristics of the KaRIn data. The spacecraft is in a nominal state when all bits equal 0. The KaRIn measurement may be affected by a spacecraft event when any of bits 0 to 5 are equal to 1. The KaRIn measurement is likely bad when bits 6 or 7 are equal to 1. N/A ubyte 255 0 to 255 1
/tvp/time Time of measurement in seconds in the UTC time scale since 1 Jan 2000 00:00:00 UTC. [tai_utc_difference] is the difference between TAI and UTC reference time (seconds) for the first measurement of the data set. If a leap second occurs within the data set, the attribute leap_second is set to the UTC time at which the leap second occurs. seconds since 2000-01-01 00:00:00.000 double N/A N/A 1
/tvp/time_tai Time of measurement in seconds in the TAI time scale since 1 Jan 2000 00:00:00 TAI. This time scale contains no leap seconds. The difference (in seconds) with time in UTC is given by the attribute [time:tai_utc_difference]. seconds since 2000-01-01 00:00:00.000 double 9.9692099683869E+36 N/A 1
/tvp/tvp_qual Flag indicating the quality of the reconstructed attitude and orbit ephemeris. A value of 0 indicates the reconstructed attitude and orbit ephemeris are both good. Non-zero values less than 20 indicate suspect data. Values greater than or equal to 20 indicate bad data. N/A ubyte 255 0 to 28 1
/tvp/velocity_heading Angle with respect to true north of the horizontal component of the spacecraft Earth-relative velocity vector. A value of 90 deg indicates that the spacecraft velocity vector pointed due east. Values between 0 and 90 deg indicate that the velocity vector has a northward component, and values between 90 and 180 deg indicate that the velocity vector has a southward component. degrees double 9.9692099683869E+36 0 to 360 1
/tvp/vx KMSF velocity component in x direction in the ECEF frame. m/s double 9.9692099683869E+36 -10000 to 10000 1
/tvp/vy KMSF velocity component in y direction in the ECEF frame. m/s double 9.9692099683869E+36 -10000 to 10000 1
/tvp/vz KMSF velocity component in z direction in the ECEF frame. m/s double 9.9692099683869E+36 -10000 to 10000 1
/tvp/x x coordinate of the KMSF origin in the ECEF frame. m double 9.9692099683869E+36 -10000000 to 10000000 1
/tvp/y y coordinate of the KMSF origin in the ECEF frame. m double 9.9692099683869E+36 -10000000 to 10000000 1
/tvp/yaw KMSF attitude yaw angle relative to the nadir track. The yaw angle is a right-handed rotation about the nadir (downward) direction. A yaw value of 0 deg indicates that the KMSF +x axis is aligned with the horizontal component of the Earth-relative velocity vector. A yaw value of 180 deg indicates that the spacecraft is in a yaw-flipped state, with the KMSF -x axis aligned with the horizontal component of the Earth-relative velocity vector. degrees double 9.9692099683869E+36 -180 to 180 1
/tvp/z z coordinate of the KMSF origin in the ECEF frame. m double 9.9692099683869E+36 -10000000 to 10000000 1
/xfactor/xfactor_minus_y X factor to scale the SLC noise-subtracted power to get sigma0 (expressed as a linear quantity) for the minus_y channel. 1 float 9.96921E+36 -1.0E+20 to 1.0E+20 1
/xfactor/xfactor_plus_y X factor to scale the SLC noise-subtracted power to get sigma0 (expressed as a linear quantity) for the plus_y channel. 1 float 9.96921E+36 -1.0E+20 to 1.0E+20 1
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