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Description

This dataset provides a simulated water surface elevation product that resembles the Ka-band Interferometer (KaRIn) measurements by the Surface Water and Ocean Topography (SWOT) mission. SWOT will provide a global coverage but this simulated subset focuses on the North America continent. The simulated SWOT KaRIN swaths span 128 km in the cross-swath direction with a 20-km nadir gap. This product is complementary to the L2_HR_PIXC_V1 product. It provides a less noisy, height-constrained geolocation (latitude, longitude, and height) of the L2_HR_PIXC_V1 pixels. In addition, this product provides an identifier associated with each pixel. The identifier contains the information of the river and/or lake features pulled from the Prior River Database (PRD) or in the Prior Lake Database (PLD). Note that this is a simulated SWOT product and not suited for any scientific exploration.

Product Summary

Platforms
COMPUTERS
Instruments
Computer
Spatial Extent

N: 52 S: 24 E: -82 W: -113

Spatial Resolution
20 Meters x 20 Meters
Geographic Region
NORTH AMERICA
Coordinate System
GEODETIC
Granule Spatial Representation
GEODETIC
Temporal Extent
2022-08-01 to 2022-08-22
Data Partner
Physical Oceanography Distributed Active Archive Center, Jet Propulsion Laboratory, NASA (NASA/JPL/PODAAC)
Concept ID
C2263383657-POCLOUD
Data State
ACTIVE
Number of Files/Granules
1499
Processing Level
2
Published
Science Keywords
Stage Height ,
Total Surface Water ,
Lakes/Reservoirs ,
Rivers/Streams

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

CNES. (2022). SWOT Simulated Level 2 North America Continent KaRIn High Rate Pixel Cloud Vector Attribute Product Version 1.0 [Data set]. NASA Physical Oceanography Distributed Active Archive Center. https://doi.org/10.5067/KARIN-2PXV1 Date Accessed: 2025-12-14

Documents

USER'S GUIDE

ALGORITHM DOCUMENTATION

DATA CITATION GUIDELINES

GENERAL DOCUMENTATION

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
azimuth_index Rare interferogram azimuth index (indexed from 0). 1 int 2147483647 0 to 999999 1
height_vectorproc Height-constrained height of the pixel above the reference ellipsoid. m float 9.96921E+36 -1500 to 15000 1
ice_clim_f Climatological ice cover flag indicating whether the pixel is ice-covered on the day of the observation based on external climatological information (not the SWOT measurement). Values of 0, 1, and 2 indicate that the surface is not ice covered, partially ice covered, and fully ice covered, respectively. A value of 255 indicates that this flag is not available. N/A byte 127 N/A 1
ice_dyn_f Dynamic ice cover flag indicating whether the pixel is ice-covered on the day of the observation based on analysis of external satellite optical data. Values of 0, 1, and 2 indicate that the surface is not ice covered, partially ice covered, and fully ice covered, respectively. A value of 255 indicates that this flag is not available. N/A byte 127 N/A 1
lake_id Identifier of the lake from the lake prior database) associated to the pixel. The format of the identifier is CBBNNNNNNT, where C=continent, B=basin, N=counter within the basin, T=type of water body. N/A string N/A N/A 1
latitude_vectorproc Height-constrained geodetic latitude of the pixel. Units are in degrees north of the equator. degrees_north double 9.9692099683869E+36 -80 to 80 1
longitude_vectorproc Height-constrained geodetic longitude of the pixel. Positive=degrees east of the Greenwich meridian. Negative=degrees west of the Greenwich meridian. degrees_east double 9.9692099683869E+36 -180 to 180 1
node_id Unique node identifier from the prior river database. The format of the identifier is CBBBBBRRRRNNNT, where C=continent, B=basin, R=reach, N=node, T=type of water body. N/A string N/A N/A 1
obs_id Tile-specific identifier of the observed feature associated to the pixel. The format of the identifier is CBBTTTSNNNNNN, where C=continent, B=basin, T=tile number, S=swath side, N=lake counter within the PIXC tile. N/A string N/A N/A 1
range_index Rare interferogram range index (indexed from 0). 1 int 2147483647 0 to 999999 1
reach_id Unique reach identifier from the prior river database. The format of the identifier is CBBBBBRRRRT, where C=continent, B=basin, R=reach, T=type. N/A string N/A N/A 1
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