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The Symphonie Project Organization View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Embry-Riddle Aeronautical University The Space Congress® Proceedings 1973 (10th) Technology Today and Tomorrow Apr 1st, 8:00 AM The Symphonie Project Organization Georg Mosl German Executive Secretary of the SYMPHONIE Project, Bonn, Germany Follow this and additional works at: https://commons.erau.edu/space-congress-proceedings Scholarly Commons Citation Mosl, Georg, "The Symphonie Project Organization" (1973). The Space Congress® Proceedings. 3. https://commons.erau.edu/space-congress-proceedings/proceedings-1973-10th/session-3/3 This Event is brought to you for free and open access by the Conferences at Scholarly Commons. It has been accepted for inclusion in The Space Congress® Proceedings by an authorized administrator of Scholarly Commons. For more information, please contact [email protected]. THE SYMPHONIE PROJECT ORGANIZATION Dr. Georg Mosl German Executive Secretary of the SYMPHONIE Project Bonn, Germany ABSTRACT SYMPHONIE is a Franco-German project for participation of French and German the planning, construction, launching, and industry in the development and con­ utilization of an experimental telecom­ struction of the satellite and the munication satellite. In this lecture, ground stations the governmental and contractor organiza­ tions are presented as well as the equal rights in the experimental uti­ project experiences discussed. lization of the satellite development results at the disposal 1 INTRODUCTION of both countries In Europe first considerations on Euro­ - observation of the existing inter­ pean telecommunication satellite projects national regulations concerning the were made about the year 1963. operation of the satellite and the ground stations. In application of the 1963 Franco-German Friendship Treaty on the co-operation Due to a subsequent agreement, the par­ between the two countries, on June 6th, ticipation of Belgian industry in the 1967, the French and German Governments development tasks amounts to about 4%. agreed to jointly plan, construct, launch, and utilize an experimental telecommun­ Various organizations have been called ication satellite called SYMPHONIE. into existence within the government authorities and by industrial companies The agreement provides the following in order to study, develop, and manufac­ principles for the execution of the ture the various parts of the SYMPHONIE project: system. equal participation of the two govern­ We shall begin this lecture with a short ments in planning, management, and fi­ description of the SYMPHONIE system and nancing of the project then present the project organization and our project experiences. equal qualitative and quantitative 3-7 2 MAIN CHARACTERISTICS OF THE The satellite will be positioned with SYMPHONIE SYSTEM an accuracy of 0.5° on its geostationary orbit at 11.5° W; this position has been The operational configuration of the geo­ chosen by mutual agreement with INTELSAT. stationary SYMPHONIE satellite is shown in figure 1. From this position, the antennas will cover the following areas (figure 2): We discern the SHF horn will receive signals from the hexagonal main hody of 1 ?n cm the visible part of the earth maximum diameter and 50 cm height the SHF antennas will transmit into the integrated apogee motor held by a two elliptical cones corresponding three-legged structure, and its fuel to the European zone and the American tank zone. the attitude control nozzles and the The satellite is equipped with two trans­ infrared earth sensors ponders receiving in the 6 GHz band and transmitting in the 4 GHz band. Each of 3 solar panels consisting of 4 sub- them may be switched to either antenna. panels each The EIRP (equivalent isotropic radiated - 4 VHP antennas of the TM/TC system power) will be 29 dBW at the edge of the zones. the SHF reception horn This EIRP permits the use of ground the SHF transmitting antenna feeders stations of about 16 m antenna diameter, and the antenna reflectors. the ground station sensitivity necessary for colour TV transmission being G/T = The satellite is three-axes stabilized. 31.5 dB/°K . The attitude control is semi-passive, using a flywheel the axis of which is The mass of the spacecraft will be parallel to the main axis of the satel­ 387 kg including the apogee motor. The lite, and a cold gas system. The direc­ launcher ELDO-EUROPA II will be able to tion of the satellite is maintained with put this payload into a transfer orbit an accuracy of 0.5° . of 300 km perigee and 36,000 km apogee altitude. The orbit control is effected by a hot gas system directed from the ground by Further details on the SYMPHONIE techni­ TC. For TC, the NASA Tone Digital Command cal characteristics may be found in the System is used. publications of the IFRB (International Frequency Registration Board) (1). The life-time of the two flight models will be 5 years. Various technical difficulties had to be overcome in the development of the 3-8 following subsystems of the satellite: 3.1.1 The Directory Council the passive type thermal control The Directory council consists of 3 Ger­ system man and 3 French members nominated by the Governments: the three-axes stabilization system with a director of the BMFT (Federal Minis­ try of Research and Technology) as • the inertial wheel German chairman • the static infrared sensor a representative of the BPA (Federal Press and Information Office) assisted the hot gas system by an advisor representing the German radio-television organizations the high-gain transponder using a 13 W travelling wave tube a representative of the BMP (Federal Ministry of Post) the solar generator: The difficulty lies in the soldering technology of the general manager of the CNES the solar cells to be cycled between (French Space Research Center) as +50° and -170° C 2000 times in 5 French Chairman years. a representative of the PTT (French For all of the satellite equipment, a Post, Telegraph, and Telephone Agency) most advanced lightweight technology had to be used in order to meet the mass a representative of the ORTF (French restrictions. Radio-Television Office). The Directory Council meets alternately PROJECT ORGANIZATION in France and in Germany, under French or German chairmanship. 3.1 GOVERNMENT SIDE ORGANIZATION (Figure 3) The Directory Council fixes the general policies of the project; its decisions The principal features of the govern­ are made on the basis of the Executive mental organization are fixed in the 1967 Committee's proposals. agreement between the German and French Governments. In particular, the Directory Council The agreement specifies two organs: decides on the Directory Council • the mission of the SYMPHONIE satellites the Executive Committee, 3-9 • the technical specifications of the 3.1.3 The Project Groups project Four project groups work under the direc­ • the selection of the main tion of the Executive Committee: contractors the satellite project group seated at • the utilization programs Bretigny, near the satellite contrac­ tor^ seat. It is composed of 45 approves the contracts persons, with a German project manager and a French deputy project manager. submits the financial plans to the two governments. the launcher project group seated at Bretigny, near the seat of ELDO 3.1.2 The Executive Committee (European Space Vehicle Launcher Development Organization). It is The Executive Committee is composed of composed of 7 persons, with a French a French and a German Executive Secre­ project manager and a German deputy tary. They are charged with the technical project manager. and financial execution of the project in accordance with the lines and the deci­ The satellite and launcher project groups sions taken by the Directory Council, are "integrated" groups consisting of and with the overall project coordina­ approximately half French and half tion. German personnel. The two full-time Executive Secretaries the ground station project group con­ are assigned by their respective govern­ sisting of a German project manager ments. The seat of the French Executive who is responsible for the ground Secretary is at Bretigny, near Paris, the station at Raisting, near Munich, and seat of the German Executive Secretary a French deputy project manager who is is at Bonn. responsible for the ground station at Pleumeur-Bodou, Bretagne. The Executive Committee meets every week alternately at Bonn and at Bretigny. the operational project group con­ During the meetings the decisions re­ sisting of a French project manager at quired to carry out the program are Bretigny who is responsible for the taken. All decisions are taken by un­ French operational network, and a animous consent. Each Executive Secretary German deputy project manager at Ober- has an advisory staff of technical, pfaffenhofen, near Munich, who is financial and legal experts. The French responsible for the German operational staff is working at Bretigny; one part network. of the German staff is working at Bonn, the other part at Bretigny. The project groups are charged with the technical control of the contractors. 3-10 The definition of the interfaces between The CIFAS General Assembly approves the satellite, launcher, ground stations, and contracts and fixes the policies of operational systems is worked out in CIFAS. co-operation of the respective project groups, under the control of the Execu­ The counterpart of the satellite project tive Committee. group is the CIFAS project group charged with the realization of the satellite. 3.2 CONTRACTORS ORGANIZATION It has its seat at Les Mureaux, near Paris. The engineers of the project group 3.2.1 Satellite are delegated by the firms of the con­ sortium. Corresponding organizations have The development and manufacture of the been established within our satellite satellite has been entrusted to the project group and the CIFAS project group. Franco-German industrial consortium CIFAS (Consortium Industriel Franco-Allemand The integration of the models is per­ pour le Satellite SYMPHONIE) consisting formed by one fixed Franco-German crew of 3 French and 3 German firms: of engineers ivithin the project group of CIFAS.
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