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| DOI | 10.5067/TEMSC-OTS62 |
| Short Name | OCEAN_MASS_TELLUS_MASCON_CRI_TIME_SERIES_RL06_V2 |
| Description | This dataset is a time series of mass variability averaged over all of the global ocean. It provides the non-steric or mass only sea level changes over time. The mass variability are derived from JPL GRACE Mascon Ocean, Ice, and Hydrology Equivalent Water Height RL06Mv02 CRI Filtered Version 2, which can be found at https://podaac.jpl.nasa.gov/dataset/TELLUS_GRAC-GRFO_MASCON_CRI_GRID_RL06_V2. A more detailed description on the Mascon solution, including the mathematical derivation, implementation of geophysical constraints, and solution validation, please see Watkins et al., 2015, doi: 10.1002/2014JB011547. The mass variability are provided as an ASCII table. |
| Version | 2 |
| Dataset Type | OPEN |
| Measurement | SOLID EARTH > GRAVITY/GRAVITATIONAL FIELD > GRAVITY ANOMALIES > OCEAN MASS TIME SERIES |
| Processing Level | 4 |
| Coverage | Region: Global Northernmost Latitude: 90 degrees Southernmost Latitude: -90 degrees Westernmost Longitude: 0 degrees Easternmost Longitude: 360 degrees Time Span: 2002-Apr-01 to Present Granule Time Span: 2002-Apr-01 to 2020-May-31 |
| Resolution | Spatial Resolution: 180 degrees (Latitude) x 360 degrees (Longitude) Temporal Resolution: 1 Month |
| Projection | Type: N/A Detail: Ellipsoid: WGS 84 |
| Latency | hours |
| Platform/Sensor | GRACE / Platform Name: Gravity Recovery and Climate Experiment (GRACE) Orbit Period: -1 minutes Inclination Angle: 89 degrees Ascending Node: 1970-Jan-01 00:00:00 GRACE SCA SENSOR Name: Star Camera Assembly (GRACE SCA) Swath Width: - km Description: The two star cameras mounted close to the accelerometer on each satellite provide the precise attitude references for the satellites when making science measurements. GRACE / Platform Name: Gravity Recovery and Climate Experiment (GRACE) Orbit Period: -1 minutes Inclination Angle: 89 degrees Ascending Node: 1970-Jan-01 00:00:00 GRACE KBR SENSOR Name: GRACE K-Band Ranging System (GRACE KBR) Swath Width: -1 km Description: This instrument precisely measures the changes in the separation between the two GRACE satellites using phase tracking of K- and Ka-band signals sent between the two satellites GRACE / Platform Name: Gravity Recovery and Climate Experiment (GRACE) Orbit Period: -1 minutes Inclination Angle: 89 degrees Ascending Node: 1970-Jan-01 00:00:00 GRACE ACC SENSOR Name: GRACE SuperSTAR Accelerometer (GRACE ACC) Swath Width: -1 km Description: The accelerometer, located at the center of mass of each satellite, measures all non-gravitational forces acting on each satellite. These forces include air drag, solar radiation pressure, and attitude control activator operation. GRACE-FO / Platform Name: Gravity Recovery and Climate Experiment Follow-On (GRACE-FO) Orbit Period: -1 minutes Inclination Angle: 89 degrees Ascending Node: 1970-Jan-01 00:00:00 GRACE-FO ACC SENSOR Name: GRACE-FO SuperSTAR Accelerometer (GRACE-FO ACC) Swath Width: -1 km Description: The accelerometer, located at the center of mass of each satellite, measures all non-gravitational forces acting on each satellite. These forces include air drag, solar radiation pressure, and attitude control activator operation. GRACE-FO / Platform Name: Gravity Recovery and Climate Experiment Follow-On (GRACE-FO) Orbit Period: -1 minutes Inclination Angle: 89 degrees Ascending Node: 1970-Jan-01 00:00:00 GRACE-FO KBR SENSOR Name: GRACE-FO K-Band Ranging System (GRACE-FO KBR) Swath Width: -1 km Description: This instrument precisely measures the changes in the separation between the two GRACE satellites using phase tracking of K- and Ka-band signals sent between the two satellites GRACE-FO / Platform Name: Gravity Recovery and Climate Experiment Follow-On (GRACE-FO) Orbit Period: -1 minutes Inclination Angle: 89 degrees Ascending Node: 1970-Jan-01 00:00:00 GRACE-FO SCA SENSOR Name: GRACE-FO Star Camera Assembly (GRACE-FO SCA) Swath Width: -1 km Description: The SCA (Star Camera Assembly) consists of three temperature controlled CCD star cameras mounted to the accelerometer, along with the respective baffle assemblies. The STR delivers its video frames to the OBC, which then computes the attitude quaternions. The OBC also acts as the power and command/control interface to the STR. Once switched on and initialized, the STR proceeds with automatic coarse attitude acquisition and then on to fine attitude derivation. |
| Project | Gravity Recovery and Climate Experiment (GRACE) |
| Data Provider | Creator: D. N. Wiese, D.-N. Yuan, C. Boening, F. W. Landerer, M. M. Watkins Release Place: JPL Release Date: 2020-Feb-28 Resource: http://grace.jpl.nasa.gov/data/get-data/jpl_global_mascons/ |
| Keyword(s) | GRACE, Tellus, Mascon, water storage, ocean mass, land mass, water height, water mass, mass, land, ocean, gravity, pressure, ocean pressure, ocean bottom pressure |
| Persistent ID | PODAAC-TEMSC-OTS62 |
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
| PO.DAAC DRIVE | https://podaac-tools.jpl.nasa.gov/drive/files/allData/tellus/L4/ocean_mass/RL06/v02/mascon_CRI |
| Format (Compression) | ASCII (NONE) |
| Announcements | |
| Grace Tellus Data Release Updates | http://grace.jpl.nasa.gov/data/data-updates/ Grace Tellus Project site for announcing recent and historical updates regarding Tellus datasets. |
| Project Materials | |
| GRACE-FO Mission | https://podaac.jpl.nasa.gov/GRACE-FO GRACE Mission Information Page |
| Tellus Mascon Project Page | http://grace.jpl.nasa.gov/data/get-data/jpl_global_mascons/ Provides additional resources and information for the Global Mascon datasets. |
| GRACE Mission | http://podaac.jpl.nasa.gov/GRACE GRACE Mission Information Page |
| Journal References | |
| Wiese et al., 2016 | https://podaac-tools.jpl.nasa.gov/drive/files/allData/grace/docs/Wiese_2016_WRR.pdf For derivations of the CRI filter and gain factors, along with a discussion of leakage errors, please see Wiese et al., 2016, doi:10.1002/2016WR019344. |
| Known Issues | |
| GRACE Data Availability Timetable | https://podaac-tools.jpl.nasa.gov/drive/files/allData/tellus/L3/docs/GRACE_GRACE-FO_Months_RL06.pdf GRACE monthly data integration range |
| GRACE Tellus Feedback Tool | http://grace.jpl.nasa.gov/about/feedback/ GRACE Tellus Project web tool for entering user feedback. Users are advised to only use this tool when submitting data quality issues directly to the GRACE Tellus Project. |
| FAQs | |
| PO.DAAC Forum Page | https://podaac.jpl.nasa.gov/forum/viewforum.php?f=27 PO.DAAC Forum Page |
| Frequently Asked Questions | http://grace.jpl.nasa.gov/about/faq/ GRACE Tellus Project page for Frequently Asked Questions. |
| Citation | D. N. Wiese, D.-N. Yuan, C. Boening, F. W. Landerer, M. M. Watkins. 2020. Tellus Level-4 Ocean Mass Anomaly Time Series from JPL GRACE/GRACE-FO Mascon CRI Filtered Release 06 version 02. Ver. 2. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/TEMSC-OTS62.
For more information see Data Citations and Acknowledgments.
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| Journal Reference | Watkins, M. M., D. N. Wiese, D.-N. Yuan, C. Boening, F. W. Landerer (2015), Improved methods for observing Earth's time variable mass distribution with GRACE, JGR Solid Earth, 10.1002/2014JB011547. | |||||||
