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Giant tracking station readies for operation
by Staff Writers
Paris (ESA) Nov 01, 2012

Beautiful sunset view of ESA's new 35m deep space station, Malargue, AR, as seen by Salvador Marti, from our ESTRACK team. On Friday, 24 August, 2012, Mars Express became the first mission to downlink telemetry via Malargue station. It will enter formal service in early 2013. Credits: ESA/S. Marti. For a larger version of this image please go here.

One of the world's most sophisticated satellite tracking stations is nearing inauguration in Malargue, Argentina, 1000 km west of Buenos Aires. The new station will ensure reliable communications with missions voyaging hundreds of millions of kilometres into our Solar System. ESA's new tracking station, near the town of Malargue in Mendoza province, joins two existing stations in Spain and Australia to provide global coverage for the Agency's deep-space missions.

Deep Space Antenna 3 - or DSA 3 - will send commands, receive data and perform radiometric measurements with missions such as Mars Express, Venus Express, Rosetta, Herschel, Planck, Gaia, BepiColombo, ExoMars, Solar Orbiter and Juice.

With major construction complete, teams are preparing DSA 3 for hand-over to operations, formal inauguration late this year and entry in routine service early in 2013.

First test signals received from Mars Express
The first test signals were received in June 2012 from Mars Express, over a distance of about 193 million km, proving that the station's technology is ready for duty.

"Our initial in-service testing with the Malargue station shows excellent results," says Roberto Madde, ESA's project manager for DSA 3 construction.

"We have been able to quickly and accurately acquire signals from ESA and NASA spacecraft, and our station is performing better than specified."

Madde says part of the reason for the excellent performance is the improved ultra-low-temperature amplifiers installed at the station, and also the fact that it's located at 1500m altitude in the clear Argentinian desert air.

Completing a trio of deep space stations
DSA 3 joins the Agency's existing DSA 1 and DSA 2 stations in New Norcia, Western Australia, and Cebreros, Spain, respectively, to provide the third link in a global network that is controlled remotely by engineers at ESOC, ESA's European Space Operations Centre, Germany.

Like the New Norcia and Cebreros stations, Malargue is equipped with a giant 35 m-diameter dish antenna and super-sophisticated cryogenically cooled low-noise amplifiers to detect faint signals and operate at various power levels - up to 20 kW - to transmit commands.

The tracking capability of all three ESA deep space stations also provides support to partner agencies such as NASA and Japan's JAXA, who likewise make their tracking networks available to ESA missions, helping to boost science data return for all.

The three are also equipped for radio science, which studies how matter, such as planetary atmospheres, affects the radio waves as they pass through. This can provide important information on the composition for the atmospheres around Mars, Venus or the Sun, for example.

Using galaxies to pin point satellite locations
The ESA stations can use the highly accurate 'delta - Differential One-Way Ranging' (delta-DOR) technique for very accurate locating and navigation of spacecraft in our Solar System.

This sophisticated method uses quasi-stellar radio sources - very energetic and distant active galaxy centres - as calibration points to fix the location of a spacecraft to within a few metres.

Boosting tracking capacity to support future missions
"The commissioning of this station into ESA's deep-space network allows us to serve the most demanding scientific missions of ESA and provide the required communication capacity for transferring large volumes of scientific data from the sophisticated instruments onboard ESA spacecraft," says Manfred Lugert, ESA's Head of Ground Facilities Operations.

"The design, development and construction of this station marks a huge success for ESA and our industrial partners," says Juan Miro, ESA's Head of Ground Systems Engineering.

"It helps to confirm ESA as Europe's top space research and development organisation."


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