Navigation Links
GOCE's 'heart' starts beating
Date:4/8/2009

GOCE's highly sensitive gradiometer instrument has been switched on and is producing data. Forming the heart of GOCE, the gradiometer is specifically designed to measure Earth's gravity field with unprecedented accuracy.

"We are very pleased with what we have seen from the gradiometer from the moment it was switched on. All accelerometer sensor heads are working in very good health and provide meaningful data," GOCE Project Manager Danilo Muzi said.

The gradiometer consists of three pairs of identical ultra-sensitive accelerometers, each mounted to point in orthogonal directions to allow the simultaneous measurement of the spatial variations of the gravity field.

With the switching on of the gradiometer, all systems on the satellite have now been activated. The satellite's sophisticated electric ion propulsion system was switched on last week and continues to operate normally.

In order to get the maximum performance from the gradiometer, GOCE was designed to provide a highly stable and undisturbed environment. However, GOCE has to orbit Earth close enough to measure the tiny differences in gravity, which forces it to endure significant drag from the uppermost layers of the atmosphere.

The atmospheric drag is compensated for by the ion engine, which is able to deliver between 1 and 20 milliNewtons of thrust (the force equivalent to our exhaling).

GOCE was injected into orbit at an altitude of 283 km on 17 March. Since then, it has been freefalling at a rate of 150 to 200 m a day and will continue to do so until it enters 'drag-free mode' at an altitude of 273 km.

At this altitude, the satellite will actively compensate for the effect of air drag and its payload will undergo a further six weeks of commissioning and calibration. Mission operations are scheduled to start in summer 2009.

"With the ion engine and the gradiometer working, we have started to tune the satellite and its instruments," GOCE System Manager Michael Fehringer said.

"We have a lot of work ahead of us, but it is a highly exciting time for everyone involved in the mission," GOCE Mission Manager Rune Floberghagen added.

Data from GOCE will be used to create an extremely accurate map of Earth's gravity field. Together with altimetry data from missions, such as ESA's Envisat, the GOCE gravity map will allow scientists to measure sea-surface height more accurately and understand sea-level change and ocean circulation better.


'/>"/>

Contact: Robert Meisner
robert.meisner@esa.int
39-069-418-0874
European Space Agency
Source:Eurekalert

Related medicine news :

1. Cordex Pharma to Collaborate with BG Medicine in a Clinical Study of Heart Failure Biomarkers
2. Exercise is safe, improves quality of life in patients with chronic heart failure
3. Heart Transplant Failures More Likely in Poor, Minority Kids
4. Obesity Linked to Heart Failure Risk
5. Exercise Might Benefit Some With Heart Failure
6. American Heart Association Statement Gives Guidance on Minimally Invasive Procedures to Treat Diseased Brain Vessels
7. Link between widely used osteoporosis drugs and heart problems probed
8. Heart Failure Congress 2009
9. Interleukin Genetics Grants LABEC Pharma a License for Sales and Distribution of Its Heart Health Genetic Test
10. Berlin Heart Receives First Regulatory Approval in North America
11. American Heart Association Leads Efforts to Reduce Preventable Deaths and Rehospitalizations for Heart Failure Patients
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/28/2017)... ... 28, 2017 , ... Calibration, qualification, and the appropriate level ... maintaining GMP and USP compliance. In a new webinar from METTLER TOLEDO entitled ... these requirements are explained. The challenge is to determine how to put ...
(Date:3/28/2017)... ... March 28, 2017 , ... Neurotechnology ... two biometric time and attendance tracking products: the new NCheck Cloud Bio Attendance ... Bio Attendance uses biometric face recognition to enable users to check in and ...
(Date:3/28/2017)... ... March 28, 2017 , ... ... the Self-Funding Success website has recently developed and published an informational resource that ... was created based on common inquiries the site’s team of third party administrator ...
(Date:3/28/2017)... ... March 28, 2017 , ... A minimally invasive ... “perfect smile.” The National Association of Dental Laboratories (NADL) is informing dentists about ... aware of when utilizing dental laboratories and technicians that create these veneers. ...
(Date:3/28/2017)... ... 2017 , ... Public relations pros work hard to earn placements and ... While many results are clear, much of PR is hard to quantify. Goal-setting and ... to measurement, firms should always take an all-inclusive approach that takes both traditional and ...
Breaking Medicine News(10 mins):
(Date:3/28/2017)... , March 28, 2017 The ... reach USD 8.0 billion by 2025, according to a ... incidence of infectious diseases and cancer is expected to ... disease diagnosis over the coming years. In addition, higher ... autologous and allogenic stem cell therapy, due to adverse ...
(Date:3/27/2017)... 27, 2017 Summary This ... Eli Lilly and its partnering interests and activities since 2010. ... provides an in-depth insight into the partnering activity of one ... demand company reports are prepared upon purchase to ensure inclusion ... The report will be delivered in PDF format ...
(Date:3/27/2017)... Columbia , March 27, 2017 LightIntegra ... has appointed William "Bill" Dubiel as President and Chief ... also elected to the Board of Directors of LightIntegra. ... the Executive Chairman of LightIntegra. "This ... next President and Chief Executive Officer. We,ve selected a ...
Breaking Medicine Technology: