Commercial companies like Hughes, Aerospatiale, and Lockheed Martin have been designing satellites to continually keep up with the growing demand for satellite phones, TVs and data services. These companies have achieved this at the expense of greater spacecraft size and power. This expense is particularly true for geostationary orbiting satellites, which requires larger transmission power and high gain dish antenna diameters, to overcome the tremendous signal loss, during its path through the 35,000 km from Earth to the satellite and vice-versa.
To begin with, satellites designs are at first cocenptualised, which provides a clear planning regarding, the purpose of the satellite and to examine the systems necessary to complete its mission. What follows next is the preliminary design and basic design stages. During the preliminary stage, a model is constructed for experimentation to test if the new technologies incorporated in the satellite can be realised during this basic design stage. An engineering model is made after this, and intense testing of all the parameters is made in-order to establish the design viability.
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There are quite a few shapes that satellites are constructed. There are the Spherical ones, cylindrical shapes, box shapes, and the multi-mission module system, where the two parts, the bus and the mission equipment, are divided into upper and lower sections. The bus system carries many sub-systems, such as, the telemetry tracking and command system, the electrical power system, attitude control system, propulsion system, structural system and thermal control system. The shapes of any satellite are decided on the basis of the size and the weight carried by the satellite.
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This post was written by LGL_Assistant on February 18, 2012
