Valli M.,Polytechnic of Milan |
Lavagna M.,Polytechnic of Milan |
61st International Astronautical Congress 2010, IAC 2010 | Year: 2010
The 21st century has begun with a significant interest in smaller satellites and therefore in the need for appropriate launch services. Europe's answer to this need is the development of the first European small launcher, named Vega, to guarantee an easier, more affordable and timely available access to space. This work presents the design of a robust control law, and the related control system architecture, for the Vega launcher ballistic phase, taking into account the complete six degrees of freedom dynamics. To gain robustness a non-linear control approach has been preferred: more specifically the Lyapunov's second stability theorem has been exploited, being a very powerful tool to guarantee asymptotic stability of the controlled dynamics. The dynamics of Vega's actuators has also been taken into account. The system performance has been checked and analyzed by numerical simulations run on real mission data for different operational and configuration scenarios, and the effectiveness of the synthesized control highlighted: in particular scenarios including a wide range of composite's inertial configurations performing various typologies of maneuvers - such as variable-angle slew maneuvers, waiting phases, spin up/down as well as controlled boost phases - have been run. The robustness of the controlled dynamics has been validated by a 100 cases Monte Carlo analysis campaign: the containment of the dispersion for the controlled variables - say the composite roll, yaw and pitch angles - confirmed the wide validity and generality of the proposed control law. This paper will show the theoretical approach and discuss the obtained results. Copyright ©2010 by the International Astronautical Federation. All rights reserved.
News Article | October 26, 2016
Arianespace has successfully launched the Sky Muster™ II satellite for Australian operator nbn (National Broadband Network) and the GSAT-18 satellite for the Indian space agency ISRO (Indian Space Research Organisation). The launch took place on October 5 at 5:30 pm (local time) from the Guiana Space Center (CSG) in Kourou, French Guiana. Today's flight was the eighth of the year for Arianespace and the fifth by an Ariane 5 launcher, which logged its 74th successful mission in a row, equaling the record set by the predecessor Ariane 4 from 1995 to 2003. With today's successful mission for Australia and India, Arianespace proudly supports two major national space programs. This launch was the 74th success in a row for Ariane 5, equaling the record set by the Ariane 4 launcher from 1995 to 2003. Ariane 5 has carried out 74 consecutive successful missions, launching 145 payloads that weigh a cumulated total of more than 623 metric tons, including: - 133 main payloads, weighing 618 metric tons, - 12 secondary payloads, weighing 5 metric tons. During this uninterrupted string of 74 launches, Ariane 5s have orbited 24 more satellites than Ariane 4 during this equivalent series of successes, launching a combined total of 348 metric tons into orbit. This unprecedented series of successful launches in the marketplace once again proves the exceptional availability and reliability of Arianespace's heavy-lift launcher. Sky Muster™ II is the second satellite launched by Arianespace for the Australian operator nbn (National Broadband Network), owned by the Commonwealth of Australia. It is also the eighth satellite that Arianespace has launched for Australia, following Aussat 3, Optus C1/D1/D2/D3 and 10, and Sky Muster™ I, launched in September 2015. Sky Muster™ II will help extend high-speed internet service to the entire country, including the Norfolk, Christmas, Macquarie and Cocos islands, in conjunction with the services currently delivered by Sky Muster™ I. With Sky Muster™ II, the operator meets its objectives of developing the digital economy in Australia, bridging the digital divide between urban and rural areas, and enhancing connections between this vast territory and the rest of the world. GSAT-18 is the 20th satellite from ISRO (Indian Space Research Organisation) to be launched by Arianespace. It will provide telecommunications services for India and bolsters ISRO's current fleet of 14 operational telecom satellites. GSAT-18 will contribute to ISRO's mission of using space to help develop the Indian subcontinent through the deployment of all types of satellites (including Earth observation, telecommunications, broadcasts of educational programs, science and navigation). Along with its own launch capacity, ISRO has entrusted Arianespace with its satellites for over 35 years, starting with the launch by Ariane 1 of the APPLE (Ariane Passenger Payload Experiment) experimental satellite in 1981. The current Arianespace order book includes two ISRO satellite launches in 2017: GSAT-11 and GSAT-17. Shortly after the announcement of the orbital injection of the two satellites, Arianespace Chairman and Chief Executive Officer Stéphane Israël said: "With this fifth Ariane 5 launch in 2016, Arianespace proudly places its excellence at the service of two strategic space programs for Australia and India. We are especially honored to have been chosen by the Australian operator nbn to launch both of its satellites, and by ISRO, with our 20th launch for the Indian space agency today. I would also like to thank our long-standing partner SSL, which produced the Sky Muster™ II satellite. "This 74th successful launch in a row by Ariane 5 equals the record set by Ariane 4. I would like to congratulate all our partners for this team success: the European Space Agency and the ESA member states participating in the Ariane program; our industrial prime contractor and lead shareholder, Airbus Safran Launchers as well as the entire European industry for Ariane; CNES/CSG along with all companies and staff at the launch base, who support us as we go from success to success. And of course, thanks to everybody at Arianespace for this eighth successful launch of 2016." To use space for a better life on earth, Arianespace guarantees access to space transportation services and solutions for any type of satellite, commercial as well as institutional, into any orbit. Since 1980, Arianespace has placed more than 500 satellites into orbit with its three launchers, Ariane, Soyuz and Vega, from French Guiana in South America, and from Baikonur, Kazakhstan (central Asia). Arianespace is headquartered in Evry, France near Paris, and has a facility at the Guiana Space Center in French Guiana, plus local offices in Washington, D.C., Tokyo and Singapore. Please follow SpaceRef on Twitter and Like us on Facebook.
News Article | February 15, 2017
Arianespace has successfully launched two satellites: SKY Brasil-1 for AT&T/DIRECTV; and Telkom 3S for Telkom Indonesia as part of a turnkey contract with Thales Alenia Space. The flight took place on Tuesday, February 14, 2017 at 6:39 p.m. (local time) from the Guiana Space Center, Europe's Spaceport in Kourou, French Guiana. Christophe Sirugue, French Minister of State for Industry, was on hand for the launch. Today's launch was the second of the year for Arianespace and the first with the Ariane 5 heavy launcher, which also recorded its 77th successful mission in a row. SKY Brasil-1 is the 10th satellite launched by Arianespace for AT&T/DIRECTV, a world leading provider of digital television programs. Its previous mission for this operator was in May 2015, with an Ariane 5 dual launch that orbited SKY Mexico-1 and DIRECTV-15. AT&T subsidiary DIRECTV Latin America provides services to more than 12.5 million subscribers, mainly in Venezuela, Argentina, Chile, Colombia and Brazil. SKY Brasil-1 is a high-definition direct-to-home (DTH) TV broadcast satellite, covering Brazil and the north Atlantic Ocean. Telkom 3S is the third satellite to be launched by Arianespace for Telkom Indonesia, this time as part of a turnkey contract with Thales Alenia Space. The previous satellites for this operator, Telkom 1 and Telkom 2, were launched by Arianespace in 1999 and 2005, respectively. All Telkom Indonesia satellites now in operation were orbited by Arianespace. Telkom Indonesia is an Indonesian state-owned company that supplies telecommunications, information, media and entertainment services (TIMES) to millions of customers throughout the Indonesian archipelago. Telkom 3S will provide high-definition television (HDTV) broadcast services, as well as mobile communications and Internet applications, with a coverage zone spanning Indonesia, Southeast Asia and a portion of Malaysia. Arianespace and Airbus Defence and Space have teamed up since the European launch services company was founded in 1980. SKY Brasil-1 is the 116th satellite built by Airbus Defence and Space (or its predecessors) to be launched by Arianespace, which has 17 more satellites produced by the company in its order book, not including the satellites in the OneWeb constellation. Arianespace and Thales Alenia Space have worked together since 1981. Including Telkom 3S, Arianespace has launched 146 satellites built by Thales Alenia Space (or its predecessors), and has nine more satellites from this manufacturer in its order book. The first Ariane 5 flight of the year was also the 77th successful launch in a row of Ariane 5, a string of successes that reaches back to 2003 and clearly demonstrates the exceptional reliability of Arianespace's heavy launcher. This year's Arianespace mission manifest includes up to 7 Ariane 5 launches in 2017 - a "Triple 7" for Ariane 5! Shortly after the announcement of the orbital injection of the two satellites, Stéphane Israël, Chairman and CEO of Arianespace, said: "Arianespace carried out its first Ariane 5 launch of the year this evening for our American and Indonesian customers, also marking the 77th successful launch in a row of our heavy launcher. We are both pleased and proud to have carried out this successful mission in the presence of Christophe Sirugue, French Minister of State for Industry; and Jean-Luc Moudenc, Mayor of Toulouse and President of the Community of Ariane Cities for 2017. We are honored by the ongoing trust expressed by the operators AT&T/DIRECTV, for whom we have orbited 10 satellites since 1993, and Telkom Indonesia, for whom we have launched all satellites now in operation. I would also like to thank our long-standing partners Airbus Defence and Space and Thales Alenia Space, who built the two satellites launched on this mission. "Congratulations to all partners who contributed to the exceptional reliability and availability of our Ariane 5 launcher: the European Space Agency (ESA), which provides essential support for the Ariane program; Airbus Safran Launchers and the entire European launcher industry; CNES/CSG, our ground segment companies and all staff at the space center, who continue to work alongside us as we go from success to success. And of course I would like to congratulate everybody at Arianespace for this successful second launch of the year." Arianespace uses space to make life better on Earth by providing launch services for all types of satellites into all orbits. It has orbited more than 550 satellites since 1980, using its family of three launchers, Ariane, Soyuz and Vega, from launch sites in French Guiana (South America) and Baikonur, Kazakhstan. Arianespace is headquartered in Evry, near Paris, and has a technical facility at the Guiana Space Center, Europe's Spaceport in French Guiana, plus local offices in Washington, D.C., Tokyo and Singapore. Arianespace is a subsidiary of Airbus Safran Launchers, which holds 74% of its share capital, with the balance held by 17 other shareholders from the European launcher industry. Please follow SpaceRef on Twitter and Like us on Facebook.
Thompson S.P.,Arianespace |
Andersson G.,RUAG Space Sweden |
Davies W.,RUAG Space Switzerland |
European Space Agency, (Special Publication) ESA SP | Year: 2012
On October 21st, 2011, lifting off from the ELS launch site in French Guiana, a Soyuz ST-B and FREGAT upper stage, carried the first two Galileo IOV spacecraft on a 3-hour 49-minute flight and successfully injected the 2 Galileo Navigation spacecraft into a circular medium-Earth orbit. The Dispenser System, the subject of this paper, is the equipped launch vehicle hardware mated directly to the FREGAT upper stage and built specifically to carry 2 Galileo IOV spacecraft during all ground and flight operations up to the moment of separation. The Dispenser System was purposely built for the Galileo IOV missions under European Space Agency and Arianespace contract. The prime contractor was selected to be RUAG Space in Sweden (Linköping) for all Dispenser "System and Management" activities and with subcontracts placed to RUAG Space in Switzerland (Zurich) for the Dispenser "Structure" and EADS CASA Spain (Madrid) for the "Hold Down and Release System" (HRS) hardware. The "Structure" is designed to transfer ground and flight loads between the spacecraft and the Launch Vehicle. The upper part, an aluminium sandwich box-type structure, interfaces with the satellites, whereas the lower part transitions to a lower frame, via a CFRP strut arrangement, to interface with the FREGAT upper stage. The spacecraft separation sub-system is composed of two sets of four low-shock "HRS" units and four "pushers" enabling to firmly hold the satellites during ground and flight operations and to release them when ordered by the Launch Vehicle. The Dispenser System also comprises an electrical sub-system and MLI. This paper summarises the overall Design, Development and Verification activities leading to the Qualification of the Dispenser System hardware. This will include the Structure and HRS contribution to the overall System Qualification. An overview of the System hardware will be described along with DDV logic, some key analysis performed and several of the full scale qualification tests achieved (at element and system level) leading to the pronouncement of qualification. Such tests being mechanical strength, stiffness, dynamic and functional. The latter for overall performance validation. Several of the results will be presented in accordance with defined specifications. In addition, the Dispenser System is equipped with telemetry instrumentation comprising 20 sensors. These sensors are dedicated to the monitoring of the flight environment in the vicinity of the spacecraft. The conclusions of the mechanical and thermal data obtained during the first flight are highlighted.
Palmieri D.,European Space Agency |
Pardos I.,European Space Agency |
Nicolini D.,European Space Agency |
Pizzicaroli A.,ELV S.p.A. |
And 2 more authors.
14th International Conference on Space Operations, 2016 | Year: 2016
VEGA was born to cover an essential role within the family of European launchers; the four-stage vehicle is tailored to cover a wide range of missions in low earth orbit and will complement Ariane (which is optimized for large satellites and missions to GTO and LEO as well as escape missions) and Soyuz (tailored for medium satellites to LEO and small spacecraft to GTO). The Vega launch system is developed by the European Space Agency, and commercially operated by ELV (launcher system prime contractor) and Arianespace (launch service provider). The qualification flight from Europe’s Spaceport in French Guiana was performed in February 2012. A second successful qualification flight in the frame of the ESA operated Verta flights was performed in May 2013 carrying the ESA Proba Vegetation spacecraft and the first non-ESA institutional earth observation spacecraft, the Vietnamese VNREDSat. The third flight was performed in May 2014 carrying the commercial earth observation spacecraft DZZ for the Government of Kazakhstan using a Verta launch vehicle. The fourth flight, a Verta flight carrying the ESA IXV re-entry capsule, was performed in February 2015. The fifth flight was performed in June 2015 carrying the European earth observation spacecraft Sentinel-2 using a Verta launch vehicle. The last Verta flight and sixth Vega flight was performed in December 2015 carrying the LISA Pathfinder scientific spacecraft. From 2016 onwards Vega will enter full commercial operations having completed the transition phase under the ESA-led Verta development program, leaving the commercial exploitation of the launch system fully in industry hands, led by ELV (a joint AVIO and ASI company) and Arianespace, with the support of CNES for the launch range operations. ESA will continue supporting the Vega commercial operations by running necessary delta-developments and improvements on the existing launch system, and in parallel by running the development of the upgraded higher performance Vega-C launch system expected to enter into commercial operations in 2019. This paper presents an overview of the current and future Vega launch system operations, in particular on ongoing improvements and evolutions during commercial operations and beyond for the new the launch system, with a focus on launch operations and on the launch complex and launch range facilities. © 2016, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
Roviera P.M.,European Space Agency |
Bertrand J.,French National Center for Space Studies |
13th International Conference on Space Operations, SpaceOps 2014 | Year: 2014
Ground segment is often considered as a secondary issue with respect to the flight segment, nevertheless a launch complex is a key element of a space system and gives a significant contribution to the success of a launch system and to its long-term sustainability. The launch complex reliability, availability and affordability are key elements to ensure access to space. While in the past the ground segment design tended to be only an outcome of the flight segment requirements, the new global and competitive context require that the launch system shall be considered as a whole. In particular, not only ground segment development costs but also its operational and long term global ownership costs have to be taken into account since the very first project trade-offs. Furthermore, the increasing demand for a more environmental conscious and sustainable development approach and the associated regulatory requirements shall be duly taken on board. This paper intends to give an overview of Ariane and other ESA launch complexes at Kourou, French Guiana, from the design concept to the operational success story return of experience, in view of future developments. Also specific aspects related to ESA launch vehicles manufacturing facilities and interfaces with the launch range will be dealt.
De Chambure D.,European Space Agency |
Guedron S.,French National Center for Space Studies |
61st International Astronautical Congress 2010, IAC 2010 | Year: 2010
The ARIANE 5 ECA launcher is the European workhorse. The current version, dubbed 'PA-2' was successfully qualified in 2009 in a generic way by ASTRIUM in the frame of the ESA Ariane development programme PA-2. During the exploitation phase, ESA funds the so-called "level 1" post flight analysis, based on flight measurement, that provide very important information on the launcher behaviour and its functional parameters at stages and engines level. Beside these key information, some in-house analysis were performed at CNES and ESA but also at ASTRIUM, SNECMA and ARIANESPACE in order to identify some affordable improvement that could allow to increase the ARIANE 5 ECA launch vehicle performance. The status beginning of 2009 was sufficiently promising to initiate a project called 'A5ECA Performance Improvement Plan'. The given target was to achieve at least 10 T performance equivalent single launch for GTO mission, by end 2010, beginning 2011. With the Payload performance improvement plan achieved, ARIANESPACE will provide the adequate response to the new customer needs for the dual launch configuration, without any negative impact on the environment for the Payloads. This paper will address the current status and main results obtained. It will focus on the technical description of the most promising selected performance improvement tracks that will be qualified at launch system level. Among them are: - Interface Flange deletion at upper part level - Reduction of discrepancies for VULCAIN 2 and HM7B functional parameters based on post flight data analysis - Optimisation of the VULCAIN 2 and HM7B mixture ratio within the qualified domain - Improvement of the LH2 thermal residual mastering of the ESC-A upper stage - System constraints release The corresponding expected payload mass capacity will be given. Copyright © 2010 by GUEDRON & al.
Astorg J.-M.,French National Center for Space Studies |
Jasinski M.,French National Center for Space Studies |
Coulon D.,European Space Agency |
61st International Astronautical Congress 2010, IAC 2010 | Year: 2010
The Soyuz at CSG program is approaching its end with the formal qualification of the Launch System to be pronounced at the beginning of 2011, before the start of the first commercial launch campaign. Therefore, this paper presents a summary of this ambitious development, the progress status in September 2010, the remaining activities and also the main difficulties encountered. First lessons learned are also discussed. Obviously, these lessons learned will be revisited after first launch and start of exploitation phase.
Kadzhaev V.,KBOM |
Barmin I.,KBOM |
Denoyers J.-Y.,Arianespace |
Ragot A.,French National Center for Space Studies
Acta Astronautica | Year: 2011
Some key aspects and criteria tasks for ensuring an acceptable reliability and safety level for complex technical systems are discussed in the view of successful operation of a launch complex, at the stage of Launch Vehicle (LV) preparation. The standards and principles of adequate characteristics for launch site core technological systems are defined. The tasks for evaluation the probability of faultless operation for the systems, their reliability a posteriori, and safety barriers formation are described. The model of the pre-launch phase is presented as a random process, in the form of "simple Poisson flow". © 2010 Elsevier Ltd.
Schmitt D.,ARIANESPACE |
Acta Astronautica | Year: 2010
While successfully and regularly operating the Ariane 5 ECA launch vehicle since 3 years, Arianespace continues to work to improve its Service & Solutions offer following three main axes: a continuous effort towards the improvement of manufacturing and operational processes, the preparation of a new batch order of launch vehicles to industry, and its participation in the preparation of ESA programs that will be proposed to ESA Council meeting at ministerial level in November 2008. While focusing on Ariane 5 activities, the paper will describe how Arianespace is getting ready to operate the European family of launch vehicles.1.Recent flights resultsIn this first part, the paper will describe the results of the Ariane 5 flights performed over the last 12 months. It will address Ariane 5 ECA flights and also the first Ariane 5 ES flight for the European ATV mission. The major launch campaign and flight events will be presented with subsequent discussions.2.Ariane 5 program driversAfter a brief description of the expected launch services demand for the next years, the paper will discuss the Ariane 5 production programs drivers and more specifically: •the continuous quality improvement process implemented to ensure regular Ariane 5 operations: configuration stabilization, enlargement of the launcher qualification domain, manufacturing and preparation operations review with the objective to smooth operational processes and control the risks and non-conformance number and•the main characteristics of the next batch order in preparation with the European Industry. Arianespace will order 35 launchers delivered ready for launch in the coming years. It takes into account an increased production rate and the industrialisation process implementation.3.Next stepsIn parallel with the development of Ariane 5 ECA activities, the main challenge for Arianespace for the next years is its transformation as an operator of a family of launchers. The paper will describe the preparation of exploitation of Vega and Soyuz at the Guiana Space Centre (CSG) in synergy with Ariane 5.The paper will finally present the Arianespace approach for future European programs expected to be decided for the coming years in Europe. © 2009 Elsevier Ltd. All rights reserved.