Products

COST-G provides a number of products via different platforms and channels:

GRACE Follow-On

Level 2 — COST-G GRACE-FO monthly spherical harmonics models are now available at the International Center for Global Gravity Earth Models (ICGEM): https://doi.org/10.5880/ICGEM.COST-G.002.
Level 2 — Deterministic Signal Model for operational Precise Orbit Determination. http://icgem.gfz-potsdam.de/series/02_COST-G/DSM/quarterly.
Level 2b — Products are available at https://doi.org/10.5880/COST-G.GRAVIS_01_L2B.
Level 3 — Products are available at the following links:
Ocean Bottom Pressure Anomalies: https://doi.org/10.5880/COST-G.GRAVIS_01_L3_OBP
Continental Water Storage Anomalies: https://doi.org/10.5880/COST-G.GRAVIS_01_L3_TWS
Ice-Mass Change Products: https://doi.org/10.5880/COST-G.GRAVIS_01_L3_ICE

GRACE

Level 2 — Products are sets of spherical harmonic coefficients which stem from the combination on solution or normal equation level. The coefficients need to be processed by a spherical harmonic synthesis in order to derive gridded data.
They are available at the International Center for Global Gravity Earth Models (ICGEM):
https://doi.org/10.5880/ICGEM.COST-G.001
Level 2b — Products are available at https://doi.org/10.5880/COST-G.GRAVIS_01_L2B.
Level 3 — Products are available at the following links:
Ocean Bottom Pressure Anomalies: https://doi.org/10.5880/COST-G.GRAVIS_01_L3_OBP
Continental Water Storage Anomalies: https://doi.org/10.5880/COST-G.GRAVIS_01_L3_TWS
Ice-Mass Change Products: https://doi.org/10.5880/COST-G.GRAVIS_01_L3_ICE

Swarm

Level 2 – Products are a combination of different kinematic orbit products and various gravity field recovery approaches. Data is available at the International Center for Global Gravity Earth Model (ICGEM):
https://doi.org/10.5880/ICGEM.2019.006

Visualisation tools

Products can be visualized interactively at:

Data publications

Please note that these different products are also published as data publications:

GRACE-FO Level-2: Gravity field coefficients
Meyer, Ulrich; Lasser, Martin; Jaeggi, Adrian; Dahle, Christoph; Flechtner, Frank; Kvas, Andreas; Behzadpour, Saniya; Mayer-Gürr, Torsten; Lemoine, Jean-Michel; Koch, Igor; Flury, Jakob; Bourgogne, Stéphane (2020): International Combination Service for Time-variable Gravity Fields (COST-G) Monthly GRACE-FO Series. V. 01. GFZ Data Services. https://doi.org/10.5880/ICGEM.COST-G.002
GRACE Level-2: Gravity field coefficients
Meyer, Ulrich; Jaeggi, Adrian; Dahle, Christoph; Flechtner, Frank; Kvas, Andreas; Behzadpour, Saniya; Mayer-Gürr, Torsten; Lemoine, Jean-Michel; Bourgogne, Stéphane (2020): International Combination Service for Time-variable Gravity Fields (COST-G) Monthly GRACE Series. V. 01. GFZ Data Services. https://doi.org/10.5880/ICGEM.COST-G.001
GRACE Level-2B: Post-processed gravity field coefficients
Dahle, Christoph; Murböck, Michael (2020): Post-processed GRACE/GRACE-FO Geopotential GSM Coefficients COST-G RL01 (Level-2B Product). V. 0002. GFZ Data Services. https://doi.org/10.5880/COST-G.GRAVIS_01_L2B
GRACE Level-3: Continental Water Storage
Boergens, Eva; Dobslaw, Henryk; Dill, Robert (2020): COST-G GravIS RL01 Continental Water Storage Anomalies. V. 0003. GFZ Data Services. https://doi.org/10.5880/COST-G.GRAVIS_01_L3_TWS
GRACE Level-3: Ocean Bottom Pressure
Dobslaw, Henryk; Boergens, Eva; Dill, Robert (2020): COST-G GravIS RL01 Ocean Bottom Pressure Anomalies. V. 0003. GFZ Data Services. https://doi.org/10.5880/COST-G.GRAVIS_01_L3_OBP
GRACE Level-3: Ice-Mass Change
Sasgen, Ingo; Groh, Andreas; Horwath, Martin (2020): COST-G GravIS RL01 Ice-Mass Change Products. V. 0002. GFZ Data Services. https://doi.org/10.5880/COST-G.GRAVIS_01_L3_ICE

Citing these references in papers whenever using these data is highly recommended and appreciated!

Benchmark data

Benchmark data for verifying background model implementations in orbit and gravity field determination software.
Martin Lasser et al. (2020).
FTP download: ftp://ftp.tugraz.at/outgoing/ITSG/COST-G/softwareComparison/