N: 90 S: -90 E: 180 W: -180
Description
Point cloud of water mask pixels (“pixel cloud”) with geolocated heights, backscatter, geophysical fields, and flags. Point cloud over tile (approx 64x64 km2); half swath (left or right side of full swath). Available in netCDF-4 file format.
Please note that this collection contains SWOT Version C science data products.
Product Summary
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.
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Documents
USER'S GUIDE
ALGORITHM THEORETICAL BASIS DOCUMENT (ATBD)
DATA CITATION GUIDELINES
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 |
|---|---|---|---|---|---|---|---|
| /pixel_cloud/prior_water_prob | Prior probability of water occurring. | 1 | float | 9.96921E+36 | 0 to 1 | 1 | N/A |
| /pixel_cloud/range_index | Rare interferogram range index (indexed from 0). | 1 | int | 2147483647 | 0 to 999999 | 1 | N/A |
| /pixel_cloud/sig0 | Normalized radar cross section (sigma0) in real, linear units (not decibels). The value may be negative due to noise subtraction. | 1 | float | 9.96921E+36 | -999999 to 999999 | 1 | N/A |
| /pixel_cloud/sig0_cor_atmos_model | Atmospheric correction to sigma0 from weather model data as a linear power multiplier (not decibels). sig0_cor_atmos_model is already applied in computing sig0 and x_factor_plus_y and x_factor_minus_y. | 1 | float | 9.96921E+36 | 1 to 10 | 1 | N/A |
| /pixel_cloud/sig0_qual | Quality flag for sig0 | N/A | uint | 4294967295 | 0 to 3994871823 | 1 | N/A |
| /pixel_cloud/sig0_uncert | 1-sigma uncertainty in the sig0 measurement. The value is given as an additive (not multiplicative) linear term (not a term in decibels). | 1 | float | 9.96921E+36 | -999999 to 999999 | 1 | N/A |
| /pixel_cloud/solid_earth_tide | Solid-Earth (body) tide height. The zero-frequency permanent tide component is not included. This value is reported for reference but is not applied to the reported height. | m | float | 9.96921E+36 | -1 to 1 | 1 | N/A |
| /pixel_cloud/water_frac | Noisy estimate of the fraction of the pixel that is water. | 1 | float | 9.96921E+36 | -1000 to 10000 | 1 | N/A |
| /pixel_cloud/water_frac_uncert | Uncertainty estimate of the water fraction estimate (width of noisy water frac estimate distribution). | 1 | float | 9.96921E+36 | 0 to 999999 | 1 | N/A |
| /pixel_cloud/x_factor_minus_y | X factor for the minus_y channel power in linear units (arbitrary units to normalize noise-subtracted power to sigma0). | 1 | float | 9.96921E+36 | 0 to 1.0E+20 | 1 | N/A |
| /pixel_cloud/x_factor_plus_y | X factor for the plus_y channel power in linear units (arbitrary units to normalize noise-subtracted power to sigma0). | 1 | float | 9.96921E+36 | 0 to 1.0E+20 | 1 | N/A |
| /tvp/altitude | Altitude above the reference ellipsoid of the KMSF origin. | m | double | 9.9692099683869E+36 | 0 to 1000000 | 1 | N/A |
| /tvp/latitude | Geodetic latitude of the KMSF origin with respect to the reference ellipsoid. | degrees_north | double | 9.9692099683869E+36 | -80 to 80 | 1 | N/A |
| /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 | N/A |
| /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 | N/A |
| /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 | N/A |
| /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 | N/A |
| /tvp/pitch | KMSF attitude pitch angle; positive values move the KMSF +x axis up. | degrees | double | 9.9692099683869E+36 | -180 to 180 | 1 | N/A |
| /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 | N/A |
| /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 | N/A |
| /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 | N/A |
| /tvp/record_counter | Index of the TVP record used to align data samples across granules. | 1 | int | 2147483647 | 1 to 999999999 | 1 | N/A |
| /tvp/roll | KMSF attitude roll angle; positive values move the +y antenna down. | degrees | double | 9.9692099683869E+36 | -180 to 180 | 1 | N/A |
| /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 | N/A |
| /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 | N/A |
| /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 | N/A |
| /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 | N/A |
| /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 | N/A |
| /tvp/vx | KMSF velocity component in x direction in the ECEF frame. | m/s | double | 9.9692099683869E+36 | -10000 to 10000 | 1 | N/A |
| /tvp/vy | KMSF velocity component in y direction in the ECEF frame. | m/s | double | 9.9692099683869E+36 | -10000 to 10000 | 1 | N/A |
| /tvp/vz | KMSF velocity component in z direction in the ECEF frame. | m/s | double | 9.9692099683869E+36 | -10000 to 10000 | 1 | N/A |
| /tvp/x | x coordinate of the KMSF origin in the ECEF frame. | m | double | 9.9692099683869E+36 | -10000000 to 10000000 | 1 | N/A |
| /tvp/y | y coordinate of the KMSF origin in the ECEF frame. | m | double | 9.9692099683869E+36 | -10000000 to 10000000 | 1 | N/A |
| /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 | N/A |
| /tvp/z | z coordinate of the KMSF origin in the ECEF frame. | m | double | 9.9692099683869E+36 | -10000000 to 10000000 | 1 | N/A |