in Space

Airbus receives go-ahead for twin GRACE-FO satellites

Posted 10 November 2017 · Add Comment

After a successful year-long test campaign by Airbus at IABG in Ottobrunn near Munich, the twin GRACE-FO (Gravity Recovery and Climate Experiment Follow-On) satellites will soon travel to their launch site in California.


 
During testing, the gravity-measuring satellites, which will track the continuous movement of liquid water, ice and the solid Earth due to Earth's changing seasons, weather and climate processes, earthquakes and even human activities, were subjected to conditions similar to those they will experience during launch and in low Earth orbit. Both satellites, each weighing 600 kilograms, will be flown to the Vandenberg Air Force Base launch site in California in December to begin final launch preparations.
 
The project is a partnership between NASA’s Jet Propulsion Laboratory, located in Pasadena, California, together with the German Research Centre for Geosciences (GFZ, Potsdam). Both GRACE-FO research satellites will be launched into a polar orbit at an altitude of around 500 km and at a distance of 220 km apart. Both satellites will then take continuous, very precise measurements of the distance variations between each other and make monthly maps of the changes in Earth’s gravitational field, which are used to track the monthly movement of liquid water, ice and the solid Earth.



The launch of the GRACE-FO twin satellites is planned for spring 2018 on a mission planned to last at least five years.
 
A Global Positioning System and a microwave ranging system measure the distance between the satellites to within a few microns and a sensitive accelerometer accounts for non-gravitational effects, such as atmospheric drag and solar radiation. The GRACE-FO satellites will also feature an additional element: a new, more precise inter-satellite laser ranging instrument, developed by a German/American joint venture, which will be tested for use in future generations of gravitational research. Each satellite also makes up to 200 profiles of temperature distribution and water-vapour content in the atmosphere and the ionosphere on a daily basis to aid weather forecasting.
 
The German/American GRACE satellites, which have been in space since 2002, are the only satellites that have been capable of monitoring the transport of mass within the Earth system. These include changes in continental water distribution, the melting of polar ice masses or large inland glaciers, and mass redistributions following earthquakes. Data from the GRACE satellites are used to detect groundwater extractions, to monitor droughts and floods, to improve hydrological models, and to precisely quantify the contribution of land glacier and polar ice melt to sea level rise.
 
Long-duration data sets are vital to provide statistically significant information about climate changes and variations. The GRACE-FO mission will continue the important job started by GRACE and collect essential climate variables.

 

* required field

Post a comment

Other Stories
Advertisement
Latest News

UK doubles F-35 fleet with another 17

The UK is set to double its number of F-35 stealth jets after ordering 17 more aircraft, Defence Secretary Gavin Williamson has announced.

Schaeffler plans to reorganise its UK business

Due to a number of factors - including 'uncertainty surrounding Brexit' - the global automotive and industrial supplier Schaeffler AG, which is based in Herzogenaurach, Germany and employs over 92,000 people worldwide, proposes to

Marshall delivers first RBAF C-130J

Marshall Aerospace and Defence Group has delivered the first Royal Bahraini Air Force (RBAF) C-130J aircraft.

Loganair launches new routes to Channel Islands from Bournemouth Airport

Two new seasonal routes from Bournemouth Airport to the Channel Islands have been unveiled for 2019.

Apprentices compete at WorldSkills UK Live

Five apprentices from BAE Systems are testing their skills at WorldSkills UK Live 15-17 November, the UK's largest event for vocational skills.

CIMON completes first tasks in space

The astronaut assistant, CIMON (Crew Interactive Mobile CompanioN), developed and built by Airbus on behalf of the German Aerospace Center (DLR), has passed its first tests in space with flying colours.

RUBB_SK_1906190119
See us at
Aviation Africa 2019SMINCW1210050218