Pre SWOT Hydrology GRRATS Virtual Station River Heights Version 2
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 TypeACTIVE
MeasurementSURFACE WATER FEATURES > SURFACE WATER > TERRESTRIAL HYDROSPHERE > RIVERS
Processing Level2
CoverageNorth 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:
ProjectionEllipsoid: WGS 84
Swath Width5.1 meters, 143.0 meters, 5.0 meters
Platform/Sensor
OSTM/JASON-2
Platform
Name: Ocean Surface Topography Mission/Jason-2 (OSTM/JASON-2)
Orbit Period: 112.43 minutes
Inclination Angle: 66.04 degrees
/
POSEIDON-3
SENSOR
Name: OSTM/Jason-2 RADAR alitmieter (POSEIDON-3)
Swath Width: 5.1 meters
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
/
ERS-1 ALTIMETER
SENSOR
Name: European Remote Sensing 1 altimeter (ERS-1 ALTIMETER)
Swath Width: 143.0 meters
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 meters
Description: Spacecraft angular distance from orbital plane relative to the Equator.

JASON-3
Platform
Name: Jason-3 (JASON-3)
Orbit Period: 112.0 minutes
Inclination Angle: 66.05 degrees
/
POSEIDON-3B
SENSOR
Name: POSEIDON-3B (POSEIDON-3B)
Swath Width: 5.1 meters
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
/
ERS-2 Altimeter
SENSOR
Name: European Remote Sensing 2 altimeter (ERS-2 Altimeter)

ProjectMaking Earth Science 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
Keyword(s)river, area, hydrology, pre-swot, inland, water, osu, water height, swot
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
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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