JPL GRACE and GRACE-FO Mascon Ocean, Ice, and Hydrology Equivalent Water Height Coastal Resolution Improvement (CRI) Filtered Release 06.3 Version 04

(TELLUS_GRAC-GRFO_MASCON_CRI_GRID_RL06.3_V4)

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Data Access
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Documentation
Citation
Version History

Version	RL06.3Mv04
Processing Level	3
Start/Stop Date	2002-Apr-04 to Present
Short Name	TELLUS_GRAC-GRFO_MASCON_CRI_GRID_RL06.3_V4
Description	This dataset contains gridded monthly global water storage/height anomalies relative to a time-mean, derived from GRACE and GRACE-FO and processed at JPL using the Mascon approach (RL06.3Mv04). A Coastal Resolution Improvement (CRI) filter has been applied to this data set to reduce signal leakage errors across coastlines. For most land hydrology, oceanographic as well as land-ice applications this is the recommend data set for the analysis of surface mass changes. The data are provided in a single data file in netCDF format, with water storage/height anomalies in equivalent water thickness units (cm). The data are derived from solving for monthly gravity field variations on geolocated spherical cap mass concentration functions, rather than global spherical harmonic coefficients. Additionally, realistic geophysical information is introduced during the computation to intrinsically remove correlated errors. Thus, these Mascon grids do not need to be de-correlated or smoothed, like traditional spherical harmonic gravity solutions. The complete Mascon solution consists of 4,551 independent estimates of surface mass change that have been derived using an equal-area 3-degree grid of individual mascons. A subset of these individual mascons span coastlines, and contain mixed land and ocean mass change signals. In a post-processing step, the CRI filter is applied to those mixed land/ocean Mascons to separate land and ocean mass. The land mask used to perform this separation is provided in the same directory as this dataset, as are uncertainty values, and the gridded mascon-ID number to enable further analysis. Since the individual mascons act as an inherent smoother on the gravity field, a set of optional gain factors (for continental hydrology applications) that can be applied to the solution to study mass change signals at sub-mascon resolution is also provided within the same data directory as the Mascon data. For use-case examples and further background on the gain factors, please see Wiese, Landerer & Watkins, 2016, https://doi.org/10.1002/2016WR019344. This RL06.3Mv04 is an updated version of the previous Tellus JPL Mascon RL06.1Mv03 (DOI, 10.5067/TEMSC-3JC63). For a 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. For a detailed description of the CRI filter implementation, please see Wiese et al., 2016, doi:10.1002/2016WR019344.
DOI	10.5067/TEMSC-3JC634
Measurement	TERRESTRIAL HYDROSPHERE > WATER BUDGET > TERRESTRIAL WATER STORAGE TERRESTRIAL HYDROSPHERE > GROUND WATER CRYOSPHERE > GLACIERS/ICE SHEETS > GLACIER MASS BALANCE/ICE SHEET MASS BALANCE
Platform/Sensor	GRACE-FO Platform Name: Gravity Recovery and Climate Experiment Follow-On (GRACE-FO) Orbit Period: 94.5 minutes Inclination Angle: 89.0 degrees / GRACE-FO MWI SENSOR Name: GRACE-FO Microwave Instrument (GRACE-FO MWI) Swath Width: 24, 32 ghz Description: Microwave frequencies the instrument operates at. GRACE-FO Platform Name: Gravity Recovery and Climate Experiment Follow-On (GRACE-FO) Orbit Period: 94.5 minutes Inclination Angle: 89.0 degrees / GRACE-FO LRI SENSOR Name: GRACE-FO Laser Ranging Interferometer (GRACE-FO LRI) GRACE-FO Platform Name: Gravity Recovery and Climate Experiment Follow-On (GRACE-FO) Orbit Period: 94.5 minutes Inclination Angle: 89.0 degrees / GRACE-FO ACC SENSOR Name: GRACE-FO SuperSTAR Accelerometer (GRACE-FO ACC) GRACE-FO Platform Name: Gravity Recovery and Climate Experiment Follow-On (GRACE-FO) Orbit Period: 94.5 minutes Inclination Angle: 89.0 degrees / GRACE-FO SCA SENSOR Name: GRACE-FO Star Camera Assembly (GRACE-FO SCA) GRACE Platform Name: Gravity Recovery and Climate Experiment (GRACE) Orbit Period: -1.0 minutes Inclination Angle: 89.0 degrees / KBR SENSOR Name: K-Band Ranging system (KBR) GRACE Platform Name: Gravity Recovery and Climate Experiment (GRACE) Orbit Period: -1.0 minutes Inclination Angle: 89.0 degrees / GRACE LRR SENSOR Name: Laser Retro-Reflector (GRACE LRR) GRACE Platform Name: Gravity Recovery and Climate Experiment (GRACE) Orbit Period: -1.0 minutes Inclination Angle: 89.0 degrees / GRACE ACC SENSOR Name: GRACE SuperSTAR Accelerometer (GRACE ACC) GRACE Platform Name: Gravity Recovery and Climate Experiment (GRACE) Orbit Period: -1.0 minutes Inclination Angle: 89.0 degrees / GRACE SCA SENSOR Name: Star Camera Assembly (GRACE SCA) Show More
Project	Gravity Recovery and Climate Experiment (GRACE)
Project	Gravity Recovery and Climate Experiment Follow-On (GRACE-FO)
Data Provider	Publisher: PO.DAAC Creator: D. N. Wiese, D.-N. Yuan, C. Boening, F. W. Landerer, M. M. Watkins Release Place: PO.DAAC Release Date: 2023-Jan-25 Resource: http://grace.jpl.nasa.gov/data/get-data/jpl_global_mascons/
Format	netCDF-4
Keyword(s)	Tellus, Mascon, Ocean Mass, Water Height, Water Mass, Gravity, Ocean Bottom Pressure, RL06.3Mv04, Sea Level, GRACE-FO, Terrestrial Water Storage

Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov

Resolution Spatial Resolution: 0.5 Decimal Degrees x 0.5 Decimal Degrees Temporal Resolution: Monthly - < Annual Coverage Region: GLOBAL North Bounding Coordinate: 90 degrees South Bounding Coordinate: -90 degrees West Bounding Coordinate: -180 degrees East Bounding Coordinate: 180 degrees Time Span: 2002-Apr-04 to Present Granule Time Span: 2002-Apr-16 to 2024-Sep-16 Projection Projection Type: Equal Area Spherical Lat-Lon Projection Detail: Geolocation information included for each pixel Ellipsoid: WGS 84

DIRECT ACCESS
Browse Granule Listing
https://cmr.earthdata.nasa.gov/virtual-directory/collections/C3195527175-POCLOUD
Search Granules
https://search.earthdata.nasa.gov/search/granules?p=C3195527175-POCLOUD
DIRECT S3-ACCESS
Available for access in-region with AWS Cloud
Region
us-west-2
Bucket/Object Prefix: Protected buckets contain the data files for a given collection. Protected simply means users must log in to Earthdata Login before gaining access to contents within that S3 Bucket. Please use the S3Credential endpoint to gain an Earthdata login token for use in S3 Access. Public buckets, in contrast, house metadata such as checksums, imagery, and metadata files and the like. A user can access public buckets and these types of files without logging in to Earthdata Login. Most of the time, you'll want to access the protected bucket Information
podaac-ops-cumulus-protected/TELLUS_GRAC-GRFO_MASCON_CRI_GRID_RL06.3_V4/
podaac-ops-cumulus-public/TELLUS_GRAC-GRFO_MASCON_CRI_GRID_RL06.3_V4/
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Name	Long Name	Unit
GAD	OCEAN_ATMOSPHERE_DEALIAS_MODEL_(GAD)	cm
land_mask	Land_Mask	binary
lat	latitude	degrees_north
lat_bounds	latitude boundaries	degrees_north
lon	longitude	degrees_east
lon_bounds	longitude boundaries	degrees_east
lwe_thickness	Liquid_Water_Equivalent_Thickness	cm
mascon_ID	Mascon_Identifier	dimensionless
scale_factor	Scale_Factor_CRI	dimensionless
time	time	days since 2002-01-01T00:00:00Z
time_bounds	time boundaries	days since 2002-01-01T00:00:00Z
uncertainty	uncertainty	cm

GENERAL DOCUMENTATION
https://grace.jpl.nasa.gov/data/get-data/jpl_global_mascons/ Additional resource and information site for the Global Mascon datasets. This includes update announcements, user feedback page, and FAQ's.
https://podaac.jpl.nasa.gov/GRACE-FO PODAAC's GRACE-FO Project-Page
https://podaac.jpl.nasa.gov/GRACE PODAAC's GRACE Project-Page
https://podaac.jpl.nasa.gov/gravity/grace-documentation Page that includes all GRACE Documentation and Technical Notes
https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/gracefo/open/docs/GRACE_GRACE-FO_ReleaseNotes_JPL_MASCON.txt RL0.63 Version 4 Release Note
DATA RECIPE
https://github.com/podaac/GRACE Python script of converting netCDF4 to GeoTIFF
DATA CITATION POLICY
https://podaac.jpl.nasa.gov/CitingPODAAC Data Use and Citation Policy

Citation is critically important for dataset documentation and discovery. Please cite the data as follows, and cite the reference papers when it is appropriate.

Citation

D. N. Wiese, D.-N. Yuan, C. Boening, F. W. Landerer, M. M. Watkins. 2023. JPL GRACE and GRACE-FO Mascon Ocean, Ice, and Hydrology Equivalent Water Height CRI Filtered RL06.3Mv04. Ver. RL06.3Mv04. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/TEMSC-3JC634

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For more information see Data Citations and Acknowledgments.

Journal Reference

Watkins, M. M., Wiese, D. N., Yuan, D. N., Boening, C., & Landerer, F. W.. 2015. Improved methods for observing Earth's time variable mass distribution with GRACE using spherical cap mascons: Improved Gravity Observations from GRACE., Journal of Geophysical Research: Solid Earth, 120, 4. 10.1002/2014JB011547

Wiese, D. N., F. W. Landerer, and M. M. Watkins. 2016. Quantifying and reducing leakage errors in the JPL RL05M GRACE mascon solution , Water Resour. Res, 52. https://doi.org//10.1002/2016WR019344

Version	Dataset	Version Date	Status
RL06Mv02	JPL GRACE and GRACE-FO Mascon Ocean, Ice, and Hydrology Equivalent Water Height Coastal Resolution Improvement (CRI) Filtered Release 06 Version 02	2021-06-23	RETIRED.	2021-06-23T18:32:00.000Z
RL06.3Mv04	JPL GRACE and GRACE-FO Mascon Ocean, Ice, and Hydrology Equivalent Water Height Coastal Resolution Improvement (CRI) Filtered Release 06.3 Version 04	2024-08-13	ACTIVE	2024-08-13T20:42:00.000Z
RL06.1Mv03	JPL GRACE and GRACE-FO Mascon Ocean, Ice, and Hydrology Equivalent Water Height Coastal Resolution Improvement (CRI) Filtered Release 06.1 Version 03	2021-06-23	RETIRED.	2021-06-23T18:32:00.000Z

Cloud Enabled

Status:

ACTIVE

Short Name:

TELLUS_GRAC-GRFO_MASCON_CRI_GRID_RL06.3_V4

Collection Concept ID:

C3195527175-POCLOUD

Spatial Coverage:

N: 90°

S: -90°

E: 180°

W: -180°

Access:

Capabilities:

Tools

PO.DAAC Data Subscriber

Information


                        Simple: podaac-data-downloader -c TELLUS_GRAC-GRFO_MASCON_CRI_GRID_RL06.3_V4 -d ./data --start-date 2002-04-04T00:00:00Z --end-date 2002-04-11T00:00:00Z -e ""
Download by Spatial and Temporal Search: podaac-data-downloader -c TELLUS_GRAC-GRFO_MASCON_CRI_GRID_RL06.3_V4 -d ./data --start-date 2002-04-04T00:00:00Z --end-date 2002-04-11T00:00:00Z -b="-180,-90,180,90"
Download by Extension: podaac-data-downloader -c TELLUS_GRAC-GRFO_MASCON_CRI_GRID_RL06.3_V4 -d ./data --start-date 2002-04-04T00:00:00Z --end-date 2002-04-11T00:00:00Z -e .nc
Download recent data (360 min.): podaac-data-subscriber -c TELLUS_GRAC-GRFO_MASCON_CRI_GRID_RL06.3_V4 -d ./data -m 360
Download recent data (1440 min.): podaac-data-subscriber -c TELLUS_GRAC-GRFO_MASCON_CRI_GRID_RL06.3_V4 -d ./data -m 1440

Direct S3-Access

Available for access in-region with AWS Cloud

Region:

us-west-2

Bucket/Object Prefix Protected buckets contain the data files for a given collection. Protected simply means users must log in to Earthdata Login before gaining access to contents within that S3 Bucket. Please use the S3Credential endpoint to gain an Earthdata login token for use in S3 Access.

Public buckets, in contrast, house metadata such as checksums, imagery, and metadata files and the like. A user can access public buckets and these types of files without logging in to Earthdata Login.

Most of the time, you'll want to access the protected bucket Information

podaac-ops-cumulus-protected/TELLUS_GRAC-GRFO_MASCON_CRI_GRID_RL06.3_V4/

podaac-ops-cumulus-public/TELLUS_GRAC-GRFO_MASCON_CRI_GRID_RL06.3_V4/

AWS S3 Credentials

Get AWS S3 Credentials | Documentation

Data Recipes:

Python script of converting netCDF4 to GeoTIFF

SYSTEM ALERT: PO.DAAC will have a 72-hours ingest and archive downtime for SWOT data from 12/9-12/11 2024, and Non-SWOT data from 12/10-12/24 2024. During this time, no data will be ingested, processed and archived. We apologize for the inconvenience.

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JPL GRACE and GRACE-FO Mascon Ocean, Ice, and Hydrology Equivalent Water Height Coastal Resolution Improvement (CRI) Filtered Release 06.3 Version 04

JPL GRACE and GRACE-FO Mascon Ocean, Ice, and Hydrology Equivalent Water Height Coastal Resolution Improvement (CRI) Filtered Release 06.3 Version 04

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JPL GRACE and GRACE-FO Mascon Ocean, Ice, and Hydrology Equivalent Water Height Coastal Resolution Improvement (CRI) Filtered Release 06.3 Version 04

JPL GRACE and GRACE-FO Mascon Ocean, Ice, and Hydrology Equivalent Water Height Coastal Resolution Improvement (CRI) Filtered Release 06.3 Version 04

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