GFZ TELLUS GRACE-FO Level-3 Monthly Ocean Bottom Pressure Anomaly Release 6.0 version 03 in netCDF/ASCII/GeoTIFF Formats

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DOI	Not Registered
Short Name	TELLUS_GRFO_L3_GFZ_RL06_OCN_v03
Description	The GFZ monthly ocean bottom pressure grids are given as equivalent water thickness changes derived from GRACE-FO time-variable gravity observations during the specified timespan in ASCII/netCDF/GeoTIFF formats. The Equivalent water thickness represent sea floor pressure changes due to the integral effect of ocean and atmosphere processes, including global mean ocean bottom pressure changes (mean ocean mass and mean atmosphere mass over the global oceans). The Level-2 GAD product has been added back, a glacial isostatic adjustment (GIA) correction has been applied, and standard corrections for geocenter (degree-1) and C20 (degree-20) are incorporated. Post-processing filters (i.e., de-striping and spatial smoothing) have been applied to reduce correlated errors. For the RL06 version, all GRACE products in the ASCII format have adopted the YAML encoding header, which is in full compliance with the PO.DAAC metadata best practices. Version 02 (v02) of the ocean bottom pressure data has resolved a processing inconsistency issue in the version 01 files for both GRACE and GRACE-FO. This inconsistency resulted in erroneous leakage corrections, in particular near GIA-affected regions. Interior ocean data points (i.e., more than 1000 km away from coastlines) were minimally affected.
Version	RL06 v03
Dataset Type	OPEN
Measurement	SOLID EARTH > GRAVITY/GRAVITATIONAL FIELD > GRAVITY OCEANS > OCEAN PRESSURE > WATER PRESSURE > OCEAN BOTTOM PRESSURE
Processing Level	3
Coverage	Region: Global Northernmost Latitude: 89.5 degrees Southernmost Latitude: -89.5 degrees Westernmost Longitude: 0 degrees Easternmost Longitude: 360 degrees Time Span: 2018-May-22 to Present
Resolution	Spatial Resolution: 1 degrees (Latitude) x 1 degrees (Longitude) Temporal Resolution: 1 Month
Projection	Type: Gridded Detail: Ellipsoid: WGS 84
Latency	hours
Platform/Sensor	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	GRACE Follow-On (GRACE-FO)
Data Provider	Creator: Felix Landerer Release Place: JPL Release Date: 2020-Jan-22 Resource: Landerer F. W. and S. C. Swenson, 2012, Accuracy of scaled GRACE terrestrial water storage estimates. Water Resources Research, Vol 48, W04531, 11 PP, doi:10.1029/2011WR011453
Keyword(s)	TELLUS, GRACE-FO, OBP, LWET, Gravity, GFZ, RL06v03, OCEAN
Persistent ID	PODAAC-GFOCN-3AG63

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

PO.DAAC DRIVE	https://podaac-tools.jpl.nasa.gov/drive/files/allData/tellus/L3/gracefo/ocean_mass/RL06/v03/GFZ
OPENDAP	https://podaac-opendap.jpl.nasa.gov/opendap/allData/tellus/L3/gracefo/ocean_mass/RL06/v03/GFZ/
Format (Compression)	NETCDF (NONE)
Web Service	https://podaac.jpl.nasa.gov/ws/search/granule/?datasetId=PODAAC-GFOCN-3AG63 (Search Granule)
Read Software
netCDF Reader	https://podaac-tools.jpl.nasa.gov/drive/files/allData/ghrsst/sw/generic_nc_readers

User's Guide
User Guide	https://podaac-tools.jpl.nasa.gov/drive/files/allData/gracefo/docs/GRACE-FO_L3_Handbook_JPL-D-103133_20190327.pdf
Project Materials
YAML Tech-Note	https://earthdata.nasa.gov/esdis/eso/standards-and-references/yaml-encoding-ascii-format-for-grace-grace-fo-mission-data NASA approved YAML encoding technical Note
Additional Sites
GRACE-FO Project	https://gracefo.jpl.nasa.gov/ GRACE-FO Project Website
GRACE-FO Info	https://podaac.jpl.nasa.gov/GRACE-FO PODAAC GRACE-FO Mission-Page

Citation

Felix Landerer. 2020. GFZ TELLUS GRACE-FO Level-3 Monthly Ocean Bottom Pressure Anomaly Release 6.0 version 03 in netCDF/ASCII/GeoTIFF Formats. Ver. RL06 v03. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD].

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For more information see Data Citations and Acknowledgments.

Journal Reference

Landerer F. W. and S. C. Swenson, Accuracy of scaled GRACE terrestrial water storage estimates. Water Resources Research, Vol 48, W04531, 11 PP, doi:10.1029/2011WR011453, 2012.