|6 of 221|
|Placed by: Modelraketten.NL on 09-11-17 15:47 | E-mail: info(at)modelraketten.nl|
Arianespace to launch Embratel Star One D2
Paris (SPX) Oct 31, 2017
Brazilian operator Embratel Star One and U.S. satellite manufacturer SSL (Space Systems Loral) have chosen Arianespace to launch the Embratel Star One D2 satellite.
Arianespace reports the signature of a launch contract for the Embratel Star One D2 satellite for Brazilian operator Embratel Star One, a subsidiary of Embratel. It will be launched in 2019 by an Ariane 5 rocket from the Guiana Space Center, Europe's Spaceport in French Guiana.
Embratel Star One D2 will be positioned in geostationary orbit at 70 deg. West. Equipped with Ku-, Ka-, C- and X-band transponders, the satellite will deliver telecommunications and direct-to-home TV broadcast services in South America and North America.
Embratel Star One D2 marks the 12th time that an Embratel Star One satellite has been booked for an Ariane launch, following seven Brasilsat satellites as well as the Embratel Star One C1, C2, C3, C4 and Embratel Star One D1 spacecraft. Built by SSL in Palo Alto, California using an SSL 1300 platform, Embratel Star One D2 will weigh 6,200 kg. at launch.
Embratel Star One is the largest satellite operator for Brazil and Latin America.
This latest contract proves Arianespace's leadership in the Brazilian market and its position as the global benchmark in launch services. Eleven satellites already have been successfully launched for Embratel Star One. This 12th contract proves the excellent relationship between Arianespace and Brazil.
Following the signature of the launch contract, Arianespace Chief Executive Officer Stephane Israel said: We are very proud to announce the signature of the 12th contract with our long-time Brazilian customer Embratel Star One, which comes less than one year after our successful launch of Star One D1 with an Ariane 5.
The trust of Embratel Star One, for which we have launched all satellites since 1985, is felt as a profound recognition of the reliability and the excellency of Arianespace's heavy-weight launch service solutions, today with Ariane 5, and tomorrow with Ariane 6.
Bron: SpaceDaily, Staff Writers
|Ariane 5 ES lofts set of Galileos | Reaction of: DRRA-KJvTil on 13-12-17 16:34 | E-mail: info(at)drra.nl|
|Ariane 5 ES lofts another set of Galileo quadruplets
December 12, 2017
An Ariane 5 ES rocket has lofted another four Galileo satellites from the European Spaceport in Kourou, French Guiana on Tuesday. The launch – the 11th of the year for Arianespace – of the FM-15 through FM-18 involves the second use of the Ariane launch vehicle for a Galileo launch, following a previous run with the Soyuz rocket. Launch was on schedule at 18:36 UTC.
Ariane 5 ES Launch:
The Ariane 5 ES – which has previously been used to loft Automated Transfer Vehicles (ATV) to the International Space Station – has an estimated LEO launch capacity of 21,000 kg (46,000 lb).
It includes all the performance improvements of Ariane 5 ECA core and boosters but replaces the ESC-A second stage with the restartable EPS used on Ariane 5 GS variants.
Arianespace mainly relies on its Ariane 5 ECA variant. However, the ES has found a role with the Galileo launches.
The launch – designated as Flight VA240 – marked the end of another busy year for Arianespace, which has seen 10 missions from French Guiana so far in 2017 – involving five launches of the heavy-lift Ariane 5, two with the medium Soyuz and three with the lightweight Vega.
The complete Galileo constellation will consist of 24 operational satellites along three orbital planes in medium Earth orbit (including two spares per orbit). The result will be Europes largest ever fleet of satellites, operating in the new environment of medium-Earth orbit.
Europes own GPS constellation was deemed to be a major requirement, so as to ensure it was not stuck with having to rely on US or Russian systems. This decision is more apt given the increasingly uncertain geopolitical climate that has followed since Galileos inception.
The final use of the Soyuz rocket took the system to Full Operation Capability (FOC), followed by the first with the Ariane ES, which was the eighth Galileo mission – bringing the number of satellites in space up to 18.
Those four satellites were named Antonianna, Lisa, Kimberley and Tijmen – named for winners of a European childrens drawing contest.
Issues during previous launches with Soyuz rockets has caused some replanning of the full deployment schedule. However, the successful first use of the Ariane 5 ES with these satellites has raised the optimism of ESA bosses.
Now that we can rely on the powerful Ariane 5, we can anticipate the quicker completion of Galileo deployment, permitting the system to enter full operation, noted Paul Verhoef, ESAs Director for the Galileo Programme and Navigation-related Activities.
The full system of 24 satellites plus spares is expected to be in place by 2020.
The next four launching on this latest mission also received their own names, Irina, Alexandre, Zofia, and Nicole.
They weigh between 715 kg. and 717 kg., and were built by OHB System in Germany with U.K.-based Surrey Satellite Technology supplying the navigation payloads.
The A5 dispenser system will keep the quartet of Galileo satellites in place during ascent, before deploying them in rapid sequence at a targeted release altitude of 23,222 km.
The 447 kg dispenser, designed by Airbus Defence and Space, is made from a combination of metal and composite materials for maximum stiffness, the dispenser has undergone very comprehensive testing at Airbus Defence and Space near Bordeaux, France, and the IABG testing centre in Ottobrunn, Germany – using both Galileo engineering models and an actual flight satellite, including fit, shock and separation testing.
The target orbit is actually 300 km below the Galileo constellation’s final working altitude: this leaves the Arianes EPS upper stage in a stable graveyard orbit, while the quartet of Galileos manoeuvre themselves up to their final set height.
The test campaign met all objectives, verifying that the behavior performs as predicted, after which the dispenser was shipped to Europe’s Spaceport in French Guiana. It performed well during the previous mission during which it debuted.
This mission is being performed on behalf of the European Commission under a contract with the European Space Agency (ESA).
The birds sport two Passive Hydrogen Maser atomic clocks; two Rubidium atomic clocks; Clock monitoring and control unit; Navigation signal generator unit; L-band antenna for navigation signal transmission, C-band antenna for uplink signal detection, two S-band antennas for telemetry and tele-commands and a search and rescue antenna.
Galileos highly-accurate atomic clocks will provide the accuracy of the system. Each satellite emits a signal containing the time it was transmitted and the satellites orbital position.
The Galileo program is Europes initiative for satellite navigation, providing a highly accurate global positioning system under civilian control, along with European control centers and a worldwide network of sensor and uplink stations.
The launch campaign began with the launch of the first two experimental satellites, Giove-A, and Giove-B, orbited by Arianespace’s Starsem affiliate on Soyuz launchers from Baikonur Cosmodrome in 2005 and 2008.
By Chris Bergin
|Production of the first Ariane 62 | Reaction of: DRRA-KJvTil on 19-12-17 18:44 | E-mail: info(at)drra.nl|
|ArianeGroup to start production of the first Ariane 62
by Staff Writers
Paris, France (SPX) Dec 19, 2017
Bigger than Big!
With the successful conclusion of Maturity Gate 6.2, ArianeGroup and its industrial partners are moving into a significant new phase in the development of Ariane 6, a flagship European Space Agency (ESA) program. This review acknowledged that the industrial process of Ariane 6 is mature enough to start fabrication of the first launcher, in line with the program's objectives.
Ariane 6 is specifically designed to be able to respond to evolving market demands. It will be a versatile, modular, competitive launcher, available in two versions, Ariane 62 and Ariane 64, in order to guarantee the continuity of European access to space.
Starting the production of the first launcher just three years after the decision of ESA Member States to launch the Ariane 6 program in December 2014 is a major step forward, said Alain Charmeau, CEO of ArianeGroup.
This milestone follows on from Maturity Gate 6.1 last April, which validated the technical, industrial and programming characteristics of Ariane 6, enabling launcher development to continue at the anticipated rate. The positive conclusion of this milestone thus made it possible to launch the production of the Ariane 6 ground qualification models.
At the same time, the European Space Agency is preparing to put the launcher into operation. A review analyzes in detail all the aspects associated with the commercialization and mass production of Ariane 6 launchers. The conclusions are expected in March 2018.
As the industrial lead contractor for development and operation of the Ariane 5 and Ariane 6 launchers, ArianeGroup coordinates an industrial network of more than 600 companies in 13 European countries, including more than 350 Small and Medium Enterprises. The ArianeGroup subsidiary Arianespace is responsible for the commercialization of Ariane 6.
|Copy a link, after selecting, simply with CTRL+C or with the right mouse button|