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Дата индексирования: Sat Dec 22 01:52:48 2007
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University Satellites and Space Science Education '2006

University Satellites and
Space Science Education 

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The abstract you have submited

Simulation of Carrier Phase GPS Observables and Feasible Attitude Determination Algorithms for Universitetskiy-Tatyana Satellite
Kozlov A.V.,

Attitude determination is widely used in navigation, geodesy, construction, magnetometry, gravimetry and so on. Carrier phase observables of radio signals transmitted by navigation satellites, when obtained from multiple antennas, potentially could provide the most accurate and stable solution for attitude determination among other methods. Introducing additional information on the antennas relative positions results in additional accuracy of the solution. A wide variety of estimation techniques is used (including restricted least-squares methods, modifications of Kalman filtering, etc.) No single method could provide the appropriate result due to some special properties of the problem, a proper combination of several techniques should be used. Obtaining that solution is rather sophisticated process but some general approaches could be introduced to even non-specialists, for example, students, to get them generally acquainted with some obstacles in attitude determination. Thus, the motion of Universitetskiy-Tatyana satellite and carrier phase observables should be simulated. This simulation could be based on the already developed practical training for students in satellite navigation. Carrier phase measurements received by the hardware are distorted due to the effects of radio-signal propagation through the environment. That is why some signal-processing techniques are to be applied. In addition the presence of undetermined ambiguities is the essential property of carrier phase observables. Those ambiguities should be resolved using different approaches.





Skobeltsyn Institute of Nuclear Physics, Moscow State University, 2005-2006