N: 90 S: -90 E: 180 W: -180
Description
Interferograms for each of the 9 Doppler beams formed and spatially averaged (low rate) by the On Board Processor, corrected on the ground for phase biases (inherent to the processing applied on board). The geometry of the measurements is also reported for use in subsequent processing. Gridded; full swath for each half orbit. Available in netCDF-4 file format.
Please note that this collection contains SWOT Version C science data products.
Product Summary
Citation
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USER'S GUIDE
ALGORITHM THEORETICAL BASIS DOCUMENT (ATBD)
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 |
|---|---|---|---|---|---|---|---|
| /right/power_miti | Uncalibrated center-beam power averaged to 250 m resolution (mitigation field). | 1 | int | 2147483647 | 0 to 16777215 | 1 | N/A |
| /right/power_squared_miti | Uncalibrated center-beam power squared averaged to 250 m resolution (mitigation field). The value should be scaled by a factor of 2304 in order to be compared to the square of the 250 m power (power_miti). | 1 | int | 2147483647 | 0 to 16777215 | 1 | N/A |
| /right/pulse_repetition_interval | KaRIn pulse repetition interval (per side). | s | float | 9.96921E+36 | 0.00021 to 0.00024 | 1 | N/A |
| /right/reference_latitude | Latitude of the location on the Earth surface, defined by a reference surface, to which the measured phase is referred. Positive latitude is North latitude, negative latitude is South latitude. | degrees_north | int | 2147483647 | -80000000 to 80000000 | 1.0E-6 | N/A |
| /right/reference_location | Location on the Earth surface, defined by a reference surface, to which the measured phase is referred. The location is given in ECEF coordinates with the X, Y, and Z components given in the coord array dimension. | m | double | 9.9692099683869E+36 | -10000000 to 10000000 | 1 | N/A |
| /right/reference_longitude | Longitude of the location on the Earth surface, defined by a reference surface, to which the measured phase is referred. East longitude relative to Greenwich meridian. | degrees_east | int | 2147483647 | 0 to 359999999 | 1.0E-6 | N/A |
| /right/sig0 | Normalized radar cross section in linear units (not decibels). | 1 | float | 9.96921E+36 | -1000 to 10000000 | 1 | N/A |
| /right/sig0_cor_atmos_model | Atmospheric correction to sigma0 from weather model data as a linear power multiplier (not decibels). | 1 | float | 9.96921E+36 | 1 to 10 | 1 | N/A |
| /right/sig0_uncert | 1-sigma uncertainty computed analytically using estimated signal to noise ratio and effective number of looks. Two-sided error bars (sig0-sig0_uncert,sig0+sig_uncert) include 68% of probability distribution. | 1 | float | 9.96921E+36 | 0 to 100 | 1 | N/A |
| /right/snr | Signal to noise ratio as a linear power ratio. | 1 | float | 9.96921E+36 | -999999 to 999999 | 1 | N/A |
| /right/time_doppler_miti | Time of Doppler mitigation field 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 | 9.9692099683869E+36 | N/A | 1 | N/A |
| /right/time_tai_doppler_miti | Time of Doppler mitigation field 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 |
| /right/uncalibrated_power_minus_y | Uncalibrated power for minus_y channel in linear units. | 1 | float | 9.96921E+36 | 0 to 1.0E+20 | 1 | N/A |
| /right/uncalibrated_power_plus_y | Uncalibrated power for plus_y channel in linear units. | 1 | float | 9.96921E+36 | 0 to 1.0E+20 | 1 | N/A |
| /right/volumetric_correlation | Volumetric correlation. | 1 | float | 9.96921E+36 | 0 to 2 | 1 | N/A |
| /right/volumetric_correlation_uncert | 1-sigma uncertainty computed analytically using observed correlation and effective number of looks. Two-sided error bars (volumetric_correlation-volumetric_correlation_uncert, volumetric_correlation+volumetric_correlation_uncert) include 68% of probability distribution. | 1 | float | 9.96921E+36 | 0 to 100 | 1 | N/A |
| /right/x_factor_minus_y | Radiometric calibration X factor as a linear power ratio for the minus_y channel. | 1 | float | 9.96921E+36 | 0 to 1.0E+20 | 1 | N/A |
| /right/x_factor_plus_y | Radiometric calibration X factor as a linear power ratio for the plus_y channel. | 1 | float | 9.96921E+36 | 0 to 1.0E+20 | 1 | N/A |
| /tvp_left/altitude | Altitude above the reference ellipsoid of the KMSF origin. | m | double | 9.9692099683869E+36 | 0 to 1000000 | 1 | N/A |
| /tvp_left/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_left/longitude | Longitude of the KMSF origin, with positive values indicating longitudes east of the Greenwich meridian. | degrees_east | double | 9.9692099683869E+36 | 0 to 360 | 1 | N/A |
| /tvp_left/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_left/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_left/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_left/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_left/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_left/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_left/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_left/record_counter | Index of the TVP record used to align data samples across granules. | 1 | int | 2147483647 | 0 to 2147483647 | 1 | N/A |
| /tvp_left/roll | KMSF attitude roll angle; positive values move the +y antenna down. | degrees | double | 9.9692099683869E+36 | -180 to 180 | 1 | N/A |
| /tvp_left/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_left/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_left/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_left/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_left/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_left/vx | KMSF velocity component in x direction in the ECEF frame. | m/s | double | 9.9692099683869E+36 | -10000 to 10000 | 1 | N/A |
| /tvp_left/vy | KMSF velocity component in y direction in the ECEF frame. | m/s | double | 9.9692099683869E+36 | -10000 to 10000 | 1 | N/A |
| /tvp_left/vz | KMSF velocity component in z direction in the ECEF frame. | m/s | double | 9.9692099683869E+36 | -10000 to 10000 | 1 | N/A |
| /tvp_left/x | x coordinate of the KMSF origin in the ECEF frame. | m | double | 9.9692099683869E+36 | -10000000 to 10000000 | 1 | N/A |
| /tvp_left/y | y coordinate of the KMSF origin in the ECEF frame. | m | double | 9.9692099683869E+36 | -10000000 to 10000000 | 1 | N/A |
| /tvp_left/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_left/z | z coordinate of the KMSF origin in the ECEF frame. | m | double | 9.9692099683869E+36 | -10000000 to 10000000 | 1 | N/A |
| /tvp_right/altitude | Altitude above the reference ellipsoid of the KMSF origin. | m | double | 9.9692099683869E+36 | 0 to 1000000 | 1 | N/A |
| /tvp_right/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_right/longitude | Longitude of the KMSF origin, with positive values indicating longitudes east of the Greenwich meridian. | degrees_east | double | 9.9692099683869E+36 | 0 to 360 | 1 | N/A |
| /tvp_right/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_right/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_right/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_right/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_right/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 |