Tag Archives: European Space Agency

European Space Agency (ESA)

Another eight Galileo satellites for Europe

Signing the contract to build another 8 Galileo satellites

Signing the contract to build another 8 Galileo satellites

Europe’s Galileo navigation constellation will gain an additional eight satellites, bringing it to completion, thanks to a contract signed at the Paris Air and Space Show.

The contract to build and test another eight Galileo satellites was awarded to a consortium led by prime contractor OHB, with Surrey Satellite Technology Ltd overseeing their navigation platforms.

This is the third such satellite signing: the first four In Orbit Validation satellites were built by a consortium led by Airbus Defence and Space, while production of the next 22 Full Operational Capability (FOC) satellites was led by OHB.

These new batch satellites are based on the already qualified design of the previous Galileo FOC satellites, except for changes on the unit level – such as improvements based on lessons learned and reacting to obsolescence of parts.

Read more…

Two More Satellites Formally Added to Galileo’s Satnav System

Galileo satellite in orbit

Galileo satellite in orbit

Two further satellites, GSAT0207 (SV ID 07) and GSAT0214 (SV ID 05), increasing the total number to 16, have formally become part of Europe’s Galileo satnav system, broadcasting timing and navigation signals worldwide while also picking up distress calls across the planet.

These are the 15th and 16th satellites to join the network, two of the four Galileos that were launched together by Ariane 5 last November (images), and the first additions to the working constellation since the start of Galileo Initial Services in December. Read more…

Winners of the European Inventor Award 2017 – Radio signals for better satellite navigation

Galileo_team_EIA17Space-based radio navigation positioning has made significant strides in recent decades. It is now poised to make a greater leap thanks to Galileo, Europe’s global navigation satellite system (GNSS). Signalling technology developed by a team of European engineers not only helps Galileo deliver better accuracy and clear up signal clutter; it also pushes satellite navigation and its features to the next level.

A European team, led by French engineer Laurent Lestarquit and his Spanish colleague José Ángel Ávila Rodríguez and including German Günter Hein and Belgian Lionel Ries, has a unique specialism: sending clear signals from space. A virtual cacophony of radio frequencies is sent down to earth from the more than 50 navigation positioning satellites currently in orbit – including those of the US-led Global Positioning System (GPS), Russia’s Global Navigation Satellite System (GLONASS) and more recently Europe’s Galileo system. This team has helped ensure that signals do not interfere with each other, and that users and developers alike will be able to profit from the next-generation positioning technology that Galileo offers.

The team’s contribution of modulation and spread-spectrum signal technologies forms one of the joint European satellite positioning system’s core components, delivering signals that enhance accuracy, save on satellite power and ensure interoperability with GLONASS and the current GPS and its possible upgrades. Read more…

Galileo signal team nominated for invention award

Jose_Angel_Avila_Rodriguez_(left)_and_Laurent_Lestarquit_(right)The engineering team behind the signal technology underpinning Europe’s Galileo satellite navigation system has reached the final of this year’s European Inventor Award, run by the European Patent Office.

The team is led by Spanish engineer José Ángel Ávila Rodríguez – now part of ESA’s Galileo team – and his French colleague Laurent Lestarquit from France’s CNES space agency.

The team also includes German Günter Hein, formerly head of the department studying the evolution of EGNOS and Galileo for ESA, as well as Belgian Engineer Lionel Ries, now in ESA’s technical directorate, as well as French CNES engineer Jean-Luc Issler. Read more…

Galileo clock anomalies under investigation

Galileo_rubidium_clock

Galileo Rubidium Clock (RAFS)

As first reported last November, anomalies have been noted in the atomic clocks serving Europe’s Galileo satellites.

Anomalies have occurred on five out of 18 Galileo satellites in orbit, although all satellites continue to operate well and the provision of Galileo Initial Services has not been affected.

Highly accurate timing is core to satellite navigation. Each Galileo carries four atomic clocks to ensure strong, quadruple redundancy of the timing subsystem: two Rubidium Atomic Frequency Standard (RAFS) clocks and two Passive Hydrogen Maser (PHM) clocks. Read more…

Father of GPS meets Europe’s Galileo team

Brad ParkinsonBrad Parkinson, hailed as the father of GPS, has visited ESA’s technical heart to meet the team behind Europe’s Galileo satellite navigation system.

Brad Parkinson was awarded the 2016 Marconi Prize for his part in developing satellite navigation. In 1972, then a US Air Force Colonel, he was put in charge of “Program 621B”, which became the Global Positioning System. Over one long September weekend in 1973 he and his team decided all key GPS elements. The first satellite was launched in February 1978.

Paul Verhoef, ESA’s Director of the Galileo Programme and Navigation-related Activities, invited Prof. Parkinson to ESA’s facility in the Netherlands to address the Directorate’s annual gathering on 11 January. Also present were members of the European Global Navigation Satellite System Agency – set to oversee newly operational Galileo services – and the European Commission. Read more…

[vid] Galileo initial services declaration

galileo-goes-liveAt a Thursday morning, Dec. 15, ceremony in Brussels titled “Galileo Goes Live,” two high officials of the European Commission issued the Galileo Initial Services Declaration.

The Declaration of Initial Services means that the Galileo satellites and ground infrastructure are now operationally ready. These signals will be highly accurate but not available all the time, since the constellation is not yet complete and users cannot always count on four satellites being visible at one time at all points on the Earth.

A series of notice advisory to Galileo users or NAGUs describe the flag status of each satellite. USABINIT NAGUs were issued for 11 satellites: 0101, 0102, 0103, 0203, 0204, 0205, 0206, 0208, 0209, 0210, and 0211. USABINIT, or Initially Usable, notifies users that a satellite is set healthy for the first time. 0104 had a power problem and is operating on E1 only. 0201 and 0202 were launched into lower orbits. 0207 and 0212-0214 are still undergoing commissioning and drifting to their designated orbital slots. Read more…

[vid] Galileo is ready to be used

With 18 Galileo satellites in orbit, supporting ground infrastructure, and after an extensive testing period, Galileo Initial Services are now available for public authorities, businesses and citizens. From now on, users around the world can be guided using the positioning, navigation and timing information provided by Galileo’s global satellite constellation. Read more…

Galileo initial services available #GalileoGoesLive #MyGalileo

Europe’s own Galileo satellite navigation system has begun operating, with the satellites in space delivering positioning, navigation and timing information to users around the globe.

This animation shows how service availability increases as the overall number of satellites in the Galileo constellation goes up.

Today, the European Commission, owner of the system, formally announced the start of Galileo Initial Services, the first step towards full operational capability. Read more…

[vid] Galileo satellites 15–18, from final preparations to liftoff

This timelapse video shows Galileo satellites 15–18, from final preparations to liftoff on a Ariane 5 launcher, flight VA233, from Europe’s Spaceport in French Guiana, on 17 November 2016, accelerating deployment of the new satellite navigation system. Galileo is the Europe’s own global satellite navigation system. The full system of 24 satellites plus spares is expected to be in place by 2020.