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Using the NASA EOSDIS Common Metadata Repository

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  • Integrated Multi-Mission Ocean Altimeter Data for Climate Research complete time series Version 4.2

    https://cmr.earthdata.nasa.gov/search/concepts/C1652971371-PODAAC.xml
    Description:

    This dataset contains along track geo-referenced Sea Surface Height Anomalies (SSHA) from TOPEX/Poseidon, Jason-1, OSTM/Jason-2 and Jason-3 (depending on time period) merged onto a single mean reference orbit. All biases and cross-calibrations have been applied to the data so SSHA are consistent between satellites to form a single climate data record. Altimeter data from the multi-mission Geophysical Data Records (GDRs) are interpolated to a common reference orbit facilitating direct time series analysis of the geo-referenced SSH. However this product does not use the TOPEX internal calibration-mode range correction. This is the main difference between version 4 and version 4.2. More information on this calibration can be found at Beckley et al. 2017 DOI 10.1002/2017JC013090. The data are in netCDF format . The data start at September 1992. The newest data are appended to the file quarterly.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -66 -180 66 180

    PODAAC Short Name: MERGED_TP_J1_OSTM_OST_ALL_V42 Version ID: 4.2 Unique ID: C1652971371-PODAAC

  • Integrated Multi-Mission Ocean Altimeter Data for Climate Research Version 4

    https://cmr.earthdata.nasa.gov/search/concepts/C1673540359-PODAAC.xml
    Description:

    This dataset contains along track geo-referenced Sea Surface Height Anomalies (SSHA) from TOPEX/Poseidon, Jason-1 and OSTM/Jason-2 (depending on time period) merged into a single mean reference orbit. All biases and cross-calibrations have been applied to the data so SSHA are consistent between satellites to form a single climate data record. Altimeter data from the multi-mission Geophysical Data Records (GDRs) are interpolated to a common reference orbit facilitating direct time series analysis of the geo-referenced SSH. The data are in netCDF format. Each file consists of one cycle of data, which is approximately 10 days long. Cycle 001 coincides with cycle 001 of TOPEX/Poseidon (September 25-October 3, 1992).

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -66 -180 66 180

    PODAAC Short Name: MERGED_TP_J1_OSTM_OST_CYCLES_V4 Version ID: 4 Unique ID: C1673540359-PODAAC

  • Integrated Multi-Mission Ocean Altimeter Data for Climate Research Version 4.2

    https://cmr.earthdata.nasa.gov/search/concepts/C1648022057-PODAAC.xml
    Description:

    This dataset contains along track geo-referenced Sea Surface Height Anomalies (SSHA) from TOPEX/Poseidon, Jason-1, OSTM/Jason-2 and Jason-3 (depending on time period) merged into a single mean reference orbit. All biases and cross-calibrations have been applied to the data so SSHA are consistent between satellites to form a single climate data record. Altimeter data from the multi-mission Geophysical Data Records (GDRs) are interpolated to a common reference orbit facilitating direct time series analysis of the geo-referenced SSH. However this product does not use the TOPEX internal calibration-mode range correction. This is the main difference between version 4 and version 4.2. More information on this calibration can be found at Beckley et al. 2017 DOI 10.1002/2017JC013090. The data are in netCDF format. Each file consists of one cycle of data, which is approximately 10 days long. Cycle 001 coincides with cycle 001 of TOPEX/Poseidon (September 25-October 3, 1992).

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -66 -180 66 180

    PODAAC Short Name: MERGED_TP_J1_OSTM_OST_CYCLES_V42 Version ID: 4.2 Unique ID: C1648022057-PODAAC

  • JASON 3 experiment: Satellite information

    https://cmr.earthdata.nasa.gov/search/concepts/C1516386088-SCIOPS.xml
    Description:

    By succeeding Topex/Poseidon, Jason-1 and Jason-2, Jason-3 extends the high-precision ocean altimetry data record to support climate monitoring, operational oceanography and seasonal forecasting. Jason-3 is the result of a joint effort by Cnes, NASA, EUMETSAT and NOAA, pursuing a heritage that has been keeping the oceans under close watch for more than 20 years. Partnership is as for Jason-2, but the operational agencies (NOAA and EUMETSAT) take the lead; Cnes serves as the system coordinator and all partners -including NASA- support science team activities. By continuing long-term operational oceanography observations, Jason-3 is a key element of the constellation of altimetry satellites in the years ahead. Succeeding Jason-2, it boasts a number of enhancements to its systems and in processing of the data it delivers. From June 2016, Jason-3 is the reference altimetry mission.The satellite is built around a PROTEUS bus carrying a typical suite of altimetry mission instruments that acquires highly accurate measurements of ocean surface height to extend the data record compiled by Topex/Poseidon, Jason-1 and Jason-2. The orbit is the traditional T/P-Jason orbit -non-sun-synchronous, 1336 km, 66° inclination on a Proteus platform. By succeeding Topex/Poseidon, Jason-1 and Jason-2, Jason-3 extends the high-precision ocean altimetry data record to support climate monitoring, operational oceanography and seasonal forecasting. Jason-3 is the result of a joint effort by CNES, NASA, EUMETSAT and NOAA, pursuing a heritage that has been keeping the oceans under close watch for more than 20 years. Partnership is as for Jason-2, but the operational agencies (NOAA and EUMETSAT) take the lead; CNES serves as the system coordinator and all partners -including NASA- support science team activities. By continuing long-term operational oceanography observations, Jason-3 is a key element of the constellation of altimetry satellites in the years ahead. From June 2016, Jason-3 is the reference mission for the altimetry constellation. Succeeding Jason-2, it boasts a number of enhancements to its systems and in processing of the data it will deliver. The satellite is built around a PROTEUS bus carrying a typical suite of altimetry mission instruments that acquires highly accurate measurements of ocean surface height to extend the data record compiled by Topex/Poseidon, Jason-1 and Jason-2. The orbit is the traditional T/P-Jason orbit -non-sun-synchronous, 1336 km, 66° inclination on a Proteus platform. [http://www.aviso.altimetry.fr/en/missions/future-missions/jason-3.html] [http://www.aviso.altimetry.fr/en/missions/future-missions/jason-3.html]

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -90 -180 90 180

    SCIOPS Short Name: CNES_http__cnes.fr_ark_68059_0b222c7948a7ffa8035b3053b4b3ad30_IDN Version ID: 1.4 Unique ID: C1516386088-SCIOPS

  • Jason-3 GPS based orbit and SSHA OGDR

    https://cmr.earthdata.nasa.gov/search/concepts/C1723370066-PODAAC.xml
    Description:

    This is a near real time dataset that provides a GPS based orbit and Sea Surface Height Anomalies (SSHA) from that orbit. It is similar to the Jason-3 Operation Geophysical Data Record (OGDR) that is distributed at NOAA (http://www.nodc.noaa.gov/sog/jason/), but includes the GPS orbit and SSHA as two additional variables. It has a 5 hour time lag due to the time needed to calculate the GPS orbit and SSHA. The GPS orbits have been shown to be more accurate than the DORIS orbits on a near real time scale and therefore produces a more accurate SSHA.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -66 -180 66 180

    PODAAC Short Name: JASON_3_L2_OST_OGDR_GPS Version ID: A Unique ID: C1723370066-PODAAC

  • MEaSUREs Gridded Sea Surface Height Anomalies Version 1812

    https://cmr.earthdata.nasa.gov/search/concepts/C1646328472-PODAAC.xml
    Description:

    These are gridded Sea Surface Height Anomalies (SSHA) above a mean sea surface, on 1/6th degree grid every 5 days. It contains the fully corrected heights, but delayed 3 months. If you require data sooner there is an interim dataset available, but with slightly lower accuracy at http://dx.doi.org/10.5067/SLINT-CDRV2. The gridded data are derived from the SSHA data of TOPEX/Poseidon, Jason-1, Jason-2 and Jason-3 as reference data from the level 2 swath data found at https://podaac.jpl.nasa.gov/dataset/MERGED_TP_J1_OSTM_OST_CYCLES_V42, plus ERS-1, ERS-2, Envisat, SARAL-AltiKa, CRyosat-2, depending on the date, from the RADS database. The gridding is done by the kriging method. The date given in the data is the center of the 5 day window.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -90 -180 90 180

    PODAAC Short Name: SEA_SURFACE_HEIGHT_ALT_GRIDS_L4_2SATS_5DAY_6THDEG_V_JPL1812 Version ID: 1812 Unique ID: C1646328472-PODAAC

  • OSCAR 1 degree ocean surface currents

    https://cmr.earthdata.nasa.gov/search/concepts/C1650311602-PODAAC.xml
    Description:

    OSCAR (Ocean Surface Current Analysis Real-time) contains near-surface ocean current estimates, derived using quasi-linear and steady flow momentum equations. The horizontal velocity is directly estimated from sea surface height, surface vector wind and sea surface temperature data. These input data sources are derived from various satellites and in situ instruments. The model formulation combines geostrophic, Ekman and Stommel shear dynamics, and a complementary term from the surface buoyancy gradient. Data are on a 1 degree grid with a 5 day resolution. OSCAR is generated by Earth Space Research (ESR) https://www.esr.org/research/oscar/oscar-surface-currents/

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -66 -180 66 180

    PODAAC Short Name: OSCAR_L4_OC_1deg Version ID: 1 Unique ID: C1650311602-PODAAC

  • OSCAR third degree resolution ocean surface currents

    https://cmr.earthdata.nasa.gov/search/concepts/C1650311601-PODAAC.xml
    Description:

    OSCAR (Ocean Surface Current Analysis Real-time) contains near-surface ocean current estimates, derived using quasi-linear and steady flow momentum equations. The horizontal velocity is directly estimated from sea surface height, surface vector wind and sea surface temperature. These data were collected from the various satellites and in situ instruments. The model formulation combines geostrophic, Ekman and Stommel shear dynamics, and a complementary term from the surface buoyancy gradient. Data are on a 1/3 degree grid with a 5 day resolution. OSCAR is generated by Earth Space Research (ESR) https://www.esr.org/research/oscar/oscar-surface-currents/

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -66 -180 66 180

    PODAAC Short Name: OSCAR_L4_OC_third-deg Version ID: 1 Unique ID: C1650311601-PODAAC

  • Pre SWOT Hydrology GRRATS Daily River Heights and Storage Version 2

    https://cmr.earthdata.nasa.gov/search/concepts/C1674168562-PODAAC.xml
    Description:

    The 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.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -90 -180 90 180

    PODAAC Short Name: PRESWOT_HYDRO_GRRATS_L2_DAILY_VIRTUAL_STATION_HEIGHTS_V2 Version ID: 2 Unique ID: C1674168562-PODAAC

  • Pre SWOT Hydrology GRRATS Virtual Station River Heights Version 2

    https://cmr.earthdata.nasa.gov/search/concepts/C1674168543-PODAAC.xml
    Description:

    The 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.

    Links: Temporal Extent: Spatial Extent:
    Minimum Bounding Rectangle: -90 -180 90 180

    PODAAC Short Name: PRESWOT_HYDRO_GRRATS_L2_VIRTUAL_STATION_HEIGHTS_V2 Version ID: 2 Unique ID: C1674168543-PODAAC