South Pacific Galileo station endures freak rains and flood

Jul 16, 2013
A 'telemetry, tracking and command' antenna, 13 m in diameter, for controlling Galileo satellites at the Galileo ground station near Nouméa, New Caledonia. The antenna is due to begin operations later in 2013. Part of a growing worldwide network, the ground station incorporates a Galileo Sensor Station that monitors the quality of navigation signals and an Uplink Station to relay navigation corrections to the satellites for rebroadcast to users. Credit: ESA - Fermin Alvarez Lopez

Think your summer has been bad? Engineers manning Galileo's South Pacific ground station on New Caledonia found themselves marooned by heavy rains and a flash flood – though the station carried on operating regardless.

Torrential rains lashed this French-administered group of islands at the start of July. The south coast of New Caledonia's main island of Grand Terre recorded more than 700 mm of rain in 24 hours – the yearly average being roughly 1100 mm.

The Galileo ground station near the capital Nouméa was caught in the deluge. Part of a growing , it incorporates a Galileo Sensor Station that monitors the quality of navigation signals and an Uplink Station to relay navigation corrections to the satellites for rebroadcast to users.

An antenna 13 m in diameter for controlling the satellites has also been built, ready to come online later this year.

"There were three engineers on site, working on the new antenna, as the rains came," explained Fermin Alvarez Lopez, overseeing ESA's Galileo ground stations.

"Located at a remote area of New Caledonia, Nouméa is built on a flat plain surrounded by bowl-like hills, helping to screen out unwanted .

"In this instance, that meant the rain funnelled down to the site area. A stream running nearby burst its banks and the access road to the site was completely washed away.

The Galileo ground station near New Caledonia capital Nouméa incorporates a Galileo Sensor Station (foreground) that monitors the quality of navigation signals and an Uplink Station (background) to relay navigation corrections to the satellites for rebroadcast to users. An antenna 13 m in diameter for controlling the satellites has also been built, ready to come online later this year. Credit: ESA-Fermin Alvarez Lopez

"The engineers had to sit tight and wait for rescue: it took 40 hours for the authorities and the hosting entity TDF to fix up the roads accessing the Galileo site to allow them to come back safely to Nouméa. TDF remained on site to ensure the station remained fully operational.

"The good news is that the ground station remained working throughout, thanks to high and an onsite generator."

The rains were the heaviest known on New Caledonia since 1951.

One of the remotest Galileo ground stations from Europe, Nouméa's site and equipment are maintained for ESA by French telecommunications company TDF.

Galileo's global ground network is essential to ensure the continued reliability of the time and positioning information embedded within navigation signals from orbit. By monitoring Galileo signals from all across the world, it serves to identify service errors and promptly correct them.

One of the most complicated developments ever undertaken by ESA, having to meet strict levels of performance, security and safety, Galileo's ground segment is overseen from twin control centres at Fucino in Italy and Oberpfaffenhofen in Germany.

Explore further: Italy's first female astronaut heads to ISS in Russian craft

add to favorites email to friend print save as pdf

Related Stories

Milestone for European navigation system

Mar 12, 2013

Galileo, Europe's rival to the US Global Positioning System (GPS), passed a milestone Tuesday when it pinpointed its first-ever ground location, the European Space Agency said.

New breed of satellites

Jun 25, 2013

(Phys.org) —These pictures give the first detailed views of the next batch of Galileo satellites, the first of which has already been delivered to ESA for rigorous testing in simulated space conditions.

Europe opens an Arctic eye on Galileo

Dec 13, 2010

(PhysOrg.com) -- Today saw the opening of a remote, northerly site in the worldwide network of Galileo ground stations. The Kiruna Galileo Station in the Swedish Arctic will play a vital role communicating ...

Soyuz rocket launches two Galileo satellites

Oct 13, 2012

A Soyuz rocket launched two Galileo satellites into orbit on Friday, marking a crucial step for Europe's planned navigation system, operator Arianespace announced.

Recommended for you

NASA issues 'remastered' view of Jupiter's moon Europa

Nov 21, 2014

(Phys.org) —Scientists have produced a new version of what is perhaps NASA's best view of Jupiter's ice-covered moon, Europa. The mosaic of color images was obtained in the late 1990s by NASA's Galileo ...

European space plane set for February launch

Nov 21, 2014

Europe's first-ever "space plane" will be launched on February 11 next year, rocket firm Arianespace said Friday after a three-month delay to fine-tune the mission flight plan.

Space station rarity: Two women on long-term crew

Nov 21, 2014

For the 21st-century spacewoman, gender is a subject often best ignored. After years of training for their first space mission, the last thing Samantha Cristoforetti and Elana Serova want to dwell on is the ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.