Pre SWOT Hydrology GRRATS Virtual Station River Heights Version 2
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1 Publication Cited this Dataset
Citation metrics available for years (2014-2020)
DOI10.5067/PSGRA-SA2V2
Short NamePRESWOT_HYDRO_GRRATS_L2_VIRTUAL_STATION_HEIGHTS_V2
DescriptionThe Global River Radar Altimeter Time Series (GRRATS) are simulated river gauge data that are derived from ERS-1, ERS-2, TOPEX/Poseidon OSTM/Jason-2, Jason-3 and Envisat altimetric measurements. The purpose of these heights are to provide satellite altimetric river height data in a form that is more recognizable to the observational community and as a way to get users use to using satellite data for river hydrology. These pre SWOT data are derived from satellites to provide hydrological measurements. The Surface Water and Ocean Topography (SWOT) mission will have hydrology as one of its objectives. This dataset does not have the same variables as SWOT, but does provide hydrological measurements with typical quality flagging typical of satellite data. Not only does it provide science information, it can also assist hydrological users new to satellite data with the satellite data formats and variables before SWOT launches.If you are looking for version 1 it can be found at https://podaac.jpl.nasa.gov/dataset/PRESWOT_HYDRO_GRRATS_L2_VIRTUAL_STATION_HEIGHTS_V1 however this version should be used with caution. Version 2, this page, is the most recent version with the most accurate algorithms used for producing river heights.
Version2
Dataset TypeCOMPLETE
MeasurementTERRESTRIAL HYDROSPHERE > SURFACE WATER > SURFACE WATER FEATURES
Processing Level2
CoverageRegion: GLOBAL
North Bounding Coordinate: 90 degrees
South Bounding Coordinate: -90 degrees
West Bounding Coordinate: -180 degrees
East Bounding Coordinate: 180 degrees
Time Span: 1992-Apr-08 to 2018-Apr-20
Granule Time Span: 1992-Apr-08 to 2018-Apr-20
ResolutionSpatial Resolution: 0.5 km (Along) x 0.25 km (Across)
Temporal Resolution: Weekly - < Monthly
ProjectionEllipsoid: WGS 84
Swath Width5.1 km
Platform/Sensor
OSTM/JASON-2
Platform
Name: Joint Altimetry Satellite Oceanography Network - 2 (OSTM/JASON-2)
Orbit Period: 112.43 minutes
Inclination Angle: 66.04 degrees
/
POSEIDON-3
SENSOR
Name: JASON-2 RADAR ALTIMETER (POSEIDON-3)
Swath Width: 5.1 kilometers
Description: Spacecraft angular distance from orbital plane relative to the Equator.

ERS-1
Platform
Name: European Remote Sensing Satellite-1 (ERS-1)
Orbit Period: 100.3 minutes
Inclination Angle: 98.5 degrees
/
ALTIMETERS
SENSOR
Name: ALTIMETERS (ALTIMETERS)
Swath Width: 143.0 kilometers
Description: Spacecraft angular distance from orbital plane relative to the Equator.

ENVISAT
Platform
Name: Environmental Satellite (ENVISAT)
Orbit Period: 100.59 minutes
Inclination Angle: 98.55 degrees
/
RA-2
SENSOR
Name: Radar Altimeter-2 (RA-2)
Swath Width: 5.0 kilometers
Description: Spacecraft angular distance from orbital plane relative to the Equator.

JASON-3
Platform
Name: Joint Altimetry Satellite Oceanography Network - 3 (JASON-3)
Orbit Period: 112.0 minutes
Inclination Angle: 66.05 degrees
/
POSEIDON-3B
SENSOR
Name: Poseidon-3B Altimeter (POSEIDON-3B)
Swath Width: 5.1 kilometers
Description: Spacecraft angular distance from orbital plane relative to the Equator.

JASON-1
Platform
Name: JASON-1 (JASON-1)
Orbit Period: 112.43 minutes
Inclination Angle: 66.04 degrees
/
POSEIDON-2
SENSOR
Name: JASON-1 RADAR ALTIMETER (POSEIDON-2)

ERS-2
Platform
Name: European Remote Sensing Satellite-2 (ERS-2)
Orbit Period: 100.3 minutes
Inclination Angle: 98.5 degrees
/
ALTIMETERS
SENSOR
Name: ALTIMETERS (ALTIMETERS)

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ProjectMaking Earth System Data Records for Use in Research Environments (MEaSUREs)
Data ProviderPublisher: NASA/JPL/SWOT
Creator: Coss, Stephen; Durand, Michael; Lettenmaier, Dennis; Yi, Yuchan; Jia, Yuanyuan; Guo, Qi; Tuozzolo, Stephen; Shum, C.K.; Allen, George H.; Calmant, Stephane; Pavelsky, Tamlin
Release Place: PO.DAAC
Release Date: 2019-Aug-30
Resource: https://podaac-tools.jpl.nasa.gov/drive/files/allData/preswot_hydrology/L2/rivers/docs/GRRATS_user_handbookV2.pdf

Keyword(s)river, area, hydrology, pre-swot, inland, water, osu, water height, swot
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
Direct Access
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Format (Compression)netCDF-4
DATA RECIPE
USER'S GUIDE
DATA CITATION POLICY
Citation Coss, Stephen; Durand, Michael; Lettenmaier, Dennis; Yi, Yuchan; Jia, Yuanyuan; Guo, Qi; Tuozzolo, Stephen; Shum, C.K.; Allen, George H.; Calmant, Stephane; Pavelsky, Tamlin. 2019. PRESWOT_HYDRO_GRRATS_L2_VIRTUAL_STATION_HEIGHTS_V2. Ver. 2. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/PSGRA-SA2V2

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Journal Reference
VersionDatasetVersion DateStatus
2Pre SWOT Hydrology GRRATS Virtual Station River Heights Version 22019-08-19ACTIVE2019-08-19T20:13:26.992Z
1Pre SWOT Hydrology GRRATS Jason-2 Virtual Station Heights Version 12016-10-19RETIRED1476907644341