Pre SWOT Hydrology GRRATS Daily River Heights and Storage Version 2
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DOI10.5067/PSGRA-DA2V2
Short NamePRESWOT_HYDRO_GRRATS_L2_DAILY_VIRTUAL_STATION_HEIGHTS_V2
DescriptionThe Global River Radar Altimeter Time Series (GRRATS) 1km/daily interpolations are river heights from ERS-1, ERS-2, TOPEX/Poseidon OSTM/Jason-2 and Envisat that are interpolated and processed to create a continuous heights for the study over the temporal range of the altimeters used. 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.
Version2
Dataset TypeACTIVE
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:
Swath Width5.1 km
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 kilometers
Description: Spacecraft angular distance from orbital plane relative to the Equator.

TOPEX/POSEIDON
Platform
Name: Topography Experiment/Poseidon (TOPEX/POSEIDON)
Orbit Period: 112.43 minutes
Inclination Angle: 66.04 degrees
/
ALT (TOPEX)
SENSOR
Name: TOPEX ALTIMETER (ALT (TOPEX))
Swath Width: 5.0 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: 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 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
/
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; Shun, C.K.; Allen, George H.; Calmant, Stephane; Pavelsky, Tamlin
Release Place: NASA/JPL/PODAAC
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
USER'S GUIDE
DATA CITATION POLICY
Citation Coss, Stephen; Durand, Michael; Lettenmaier, Dennis; Yi, Yuchan; Jia, Yuanyuan; Guo, Qi, Tuozzolo, Stephen; Shun, C.K.; Allen, George H.; Calmant, Stephane; Pavelsky, Tamlin. 2019. PRESWOT_HYDRO_GRRATS_L2_DAILY_VIRTUAL_STATION_HEIGHTS_V2. Ver. 2. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/PSGRA-DA2V2

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