[meteorite-list] ESA Helping China To The Moon

From: Ron Baalke <baalke_at_meteoritecentral.com>
Date: Fri, 29 Nov 2013 18:23:57 -0800 (PST)
Message-ID: <201311300223.rAU2NvuN002150_at_zagami.jpl.nasa.gov>

http://www.esa.int/Our_Activities/Operations/Helping_China_to_the_Moon

Helping China To The Moon
European Space Agency
29 November 2013

Shortly after China's Chang'e-3 spacecraft departs Earth to land on the
Moon, ESA's network of tracking stations will swing into action, providing
crucial support for the vessel's five-day lunar cruise.

China's Chang'e-3, named after the mythological goddess of the Moon, is
scheduled for lift off on 1 December from the Xichang launch base in China's
Sichuan province on a journey to deposit a lander and a six-wheeled rover
on the lunar surface.

The landing, in the Sea of Rainbows on 14 December, will be the first
since Russia's Luna-24 in 1976.

Immediately after liftoff, ESA's station in Kourou, French Guiana, will
start receiving signals from the mission and uploading commands on behalf
of the Chinese control centre.

The tracking will run daily throughout the voyage to the Moon. Then, during
descent and after landing, ESA's deep-space stations will pinpoint the
craft???s path and touchdown.

"We are proud that the expertise of our ground station and flight dynamics
teams and the sophisticated technologies of our worldwide Estrack network
can assist China to deliver a scientifically important lander and rover
to the Moon," says ESA's Thomas Reiter, Director for Human Spaceflight
and Operations.

"Whether for human or robotic missions, international cooperation like
this is necessary for the future exploration of planets, moons and asteroids,
benefitting everyone."

The effort is being run from the Estrack Control Centre in ESA's European
Space Operations Centre in Darmstadt, Germany.

Following lunar mission progress

Chang'e-3 liftoff is set for around 18:00 GMT on 1 December, and the 15
m-diameter dish in Kourou will pick up the first signals around 18:44
GMT.

Working with Chinese tracking stations, Kourou will support the mission
through lunar orbit entry on 6 December continuing until just prior to
its descent to the surface, expected around mid-day on 14 December.

The landing and rover operations on the Moon will be commanded via two
Chinese tracking stations at Kashi, in the far west of China, and at Jiamusi,
in the northeast.

"After the lander and rover are on the surface, we will use our 35 m-diameter
deep-space antennas at Cebreros, Spain, and New Norcia, Australia, to
provide 'delta-DOR' location measurement," says Erik Soerensen, responsible
for external mission tracking support at ESOC.

"Using this delta-DOR technique, you can compute locations with extreme
accuracy, which will help our Chinese colleagues to determine the precise
location of the lander."

Ceberos and New Norcia stations watch lunar landing

Together with Cebreros, New Norcia will record Chang'e-3's radio signals
during landing, which will help the Chinese space agency to reconstruct
the trajectory for future reference.

A team of engineers from China will be on hand in Darmstadt. "While we're
very international at ESOC, hardly anyone speaks Mandarin, so having Chinese
colleagues on site will really help in case of any unforeseen problems,"
says Erik.

"Both sides are using international technical standards to enable our
stations and ESOC to communicate with their mission and ground systems."
Received on Fri 29 Nov 2013 09:23:57 PM PST