Gravity Field Solutions for dedicated Time Periods


The following gravity field time series are presently available:

GRACE monthly solutions from the 3 processing centers CSR, GFZ and JPL

    CSR Release 05 (UTCSR Level-2 Processing Standards Document, Rev 4.0 May 29, 2012)
    GFZ Release 05 (GFZ GRACE Level-2 Processing, Revised Edition, January 2013)
    JPL Release 05 (PL Level-2 Processing Standards Document, Release 05.1 November 3, 2014)

The processing standards to generate the GRACE Level-2 products of CSR, GFZ and JPL
are also available in the Document Section of the GRACE archives at GFZ ISDC or JPL PO.DAAC

GRACE / CHAMP monthly solutions from other groups

    AIUB Release 02 (more information can be found here)
    CNES/GRGS (GRACE solutions release 03; more information can be found here)
    DMT-1 (more information can be found here)
    EGSIEM (GRACE monthly combined solutions from the EGSIEM project, more information can be found here)
    HUST-Grace2016 DOI (GRACE monthly solutions from the Huazhong University of Science and Technology, Wuhan, PR China)
    ITG (more information can be found here)
    ITSG-Grace2014 (GRACE monthly solutions from the ITSG, TU Graz; more information can be found here)
    ITSG-Grace2016 DOI (GRACE monthly solutions from the ITSG, TU Graz; more information can be found here)
    Tongji Release 01 (GRACE monthly solutions from the Tongji University, Shanghai, PR China)
    Tongji Release 02 new version (GRACE monthly solutions from the Tongji University, Shanghai, PR China)
    Tongji Release 02 old version (GRACE monthly solutions from the Tongji University, Shanghai, PR China)
    ULux (CHAMP monthly solutions from the University of Luxembourg)
    WHU RL01 (GRACE monthly solutions from the GNSS Research Center of Wuhan University, PR China)

GRACE weekly solutions

    GFZ Release 05 (GFZ GRACE Level-2 Processing, Revised Edition, January 2013)

GRACE daily solutions

    ITSG-Grace2014 (more information can be found here)
    ITSG-Grace2016 DOI (more information can be found here)

SLR monthly solutions

    SLR-only monthly solutions from AIUB

Non-isotropic smoothing

The following monthly solutions are also available after non-isotropic smoothing (decorrelation):

    AIUB Release 02 (more information can be found here)
    CSR Release 05 (UTCSR Level-2 Processing Standards Document, Rev 4.0 May 29, 2012)
    GFZ Release 05 (GFZ GRACE Level-2 Processing, Revised Edition, January 2013)
    HUST-Grace2016 DOI (GRACE monthly solutions from the Huazhong University of Science and Technology, Wuhan, PR China)
    ITSG-Grace2014 (GRACE monthly solutions from the ITSG, TU Graz; more information can be found here)
    ITSG-Grace2016 DOI (GRACE monthly solutions from the ITSG, TU Graz; more information can be found here)
    JPL Release 05 (PL Level-2 Processing Standards Document, Release 05.1 November 3, 2014)
    Tongji Release 01 (GRACE monthly solutions from the Tongji University, Shanghai, PR China)
    Tongji Release 02 new version (GRACE monthly solutions from the Tongji University, Shanghai, PR China)
    Tongji Release 02 old version (GRACE monthly solutions from the Tongji University, Shanghai, PR China)

For this purpose the mean model EIGEN-6C has been subtracted and to the difference the 8 different filters DDK1, ..., DDK8 after Kusche et al (2009) have been applied.
The mean model has been added back to the filtered differences to ensure that they can be used in our calculation service to calculate the defined functionals.

The names of the filtered models begin with "kfilter_DDK" and are available in the corresponding directories.

More information about the non-isotropic filtering (destriping), including the filter matrices and their coefficients, as well as an Octave/Matlab script, can be found here.
Here is a visualization of the filter-kernels from DDK1 (strongest smoothing) to DDK8 (weakest smoothing).
(Thanks to Roelof Rietbroek)

Reference:
J. Kusche, R. Schmidt, S. Petrovic, R. Rietbroek
Decorrelated GRACE time-variable gravity solutions by GFZ, and their validation using a hydrological model
Journal of Geodesy DOI:10.1007/s00190-009-0308-3


acrobat_reader_icon The final draft can be downloaded here.