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Gravity Field and Steady-State Ocean Circulation Explorer (GOCE) Data Products
Entry ID: GOCE_DATA_PARENT

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Summary

Abstract: [Source: ESA GOCE Home Page, http://www.esa.int/esaLP/ESA4HK1VMOC_LPgoce_0.html ]

The objective of GOCE is the provision of a high-accuracy, high-resolution model for the static part of the Earth’s gravity field. This model will basically be derived from gradiometer (SGG) and GPS tracking (SST) observations.

Concerning the use of GOCE data products, five different themes have been distinguished:

- Oceanography
- Solid-Earth
- Geodesy
- Glaciology
- Sea level change studies

For certain applications within these themes, level 1 data products can be used directly, e.g., calibrated SGG observations in certain solid-Earth studies. However, in certain other applications a spherical harmonic expansion or a linear function of this can be used directly, e.g., in ocean current derivation from satellite radar altimetry, and in precise orbit computations.

However, for some GOCE impact studies, especially level 2 products, other representation forms are needed, some of which may be derived by linear transformations or derivations from a spherical harmonic expansion.

Three stages to estimate gravity and the geoid

The complex data processing from engineering numbers to a gravity product can be divided into three consecutive stages:

+ Level 0 -> 1b
Real time orbits from GPS
Determination of gravity gradients, common mode accelerations and attitude information
(e.g. orientation and angular velocities)
Combined analysis of accelerometers, GPS, star sensors, attitude and drag controls

+ Level 2
Determination of the best possible set of spherical harmonic coefficients of the Earth’s gravity
field and precision orbits, including quality parameters for orbit and for the set of coefficients.
As derived products, a geoid model and a gravity anomaly model are determined

+ Level 3 and higher
The level 2 data products serve as input for the further fields of science and application
(e.g. solid-Earth physics, oceanography, ice research, geodesy and sea level studies)

Related URL

Link: GET DATA
Description: Access ESA Data Products

Link: VIEW RELATED INFORMATION
Description: Access GOCE calibration information.

Link: VIEW RELATED INFORMATION > USER'S GUIDE
Description: Access GOCE related links, additional information, and product handbooks.

Geographic Coverage

N: 90.0 S: -90.0 E: 180.0 W: -180.0

Data Set Citation

Dataset Originator/Creator: European Space Agency (ESA)
Dataset Title: Gravity Field and Steady-State Ocean Circulation Explorer (GOCE) Data Products
Dataset Publisher: ESA
Online Resource: http://www.esa.int/esaLP/LPgoce.html

Temporal Coverage

Start Date: 2009-03-17

Location Keywords

GEOGRAPHIC REGION > GLOBAL

Science Keywords

ATMOSPHERE >ATMOSPHERIC PRESSURE >GRAVITY WAVE    [Definition]

OCEANS >MARINE GEOPHYSICS >MARINE GRAVITY FIELD    [Definition]

SOLID EARTH >GRAVITY/GRAVITATIONAL FIELD >CRUSTAL MOTION    [Definition]

SOLID EARTH >GRAVITY/GRAVITATIONAL FIELD >GRAVITATIONAL FIELD    [Definition]

SOLID EARTH >GRAVITY/GRAVITATIONAL FIELD >GRAVITY    [Definition]

SOLID EARTH >GRAVITY/GRAVITATIONAL FIELD >CRUSTAL MOTION >OCEAN CRUST DEFORMATION    [Definition]

ISO Topic Category

CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
GEOSCIENTIFIC INFORMATION
OCEANS

Platform

GOCE >Gravity Field and Steady-State Ocean Circulation Explorer [Information]

Instrument

LRR >Laser Retro-Reflector    [Information]

SSTI >Satellite-to-Satellite Tracking Instrument    [Information]

EGG >Electrostatic Gravity Gradiometer    [Information]

Use Constraints

Please cite the data set originator if you use this data.

Data Set Progress

PLANNED

Originating Center

ESA

Data Center

Earthnet Online, European Space Agency [Information]
Data Center URL: http://earth.esa.int

Data Center Personnel

Name: ESA EARTH OBSERVATION HELPDESK
Phone: +39 06 94180777
Fax: +39 06 94180292
Contact Address:
ESA/ESRIN
Via Galileo Galilei, CP 64
City: Frascati
Postal Code: I-00044
Country: Italy

Personnel

ESA EARTH OBSERVATION HELPDESK
Role: TECHNICAL CONTACT
Phone: +39 06 94180777
Fax: +39 06 94180292
Contact Address:
ESA/ESRIN
Via Galileo Galilei, CP 64
City: Frascati
Postal Code: I-00044
Country: Italy

SCOTT A. RITZ
Role: DIF AUTHOR
Phone: 301-614-5126
Fax: 301-614-5268
Email: Scott.A.Ritz at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Global Change Master Directory
City: Greenbelt
Province or State: Maryland
Postal Code: 20771
Country: USA

Creation and Review Dates

DIF Creation Date: 2004-02-16

Last DIF Revision Date: 2012-10-15

Future DIF Review Date: 2005-05-07

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