Researches On The Realization Of Satellite Navigation Coordinate Reference System

The navigation satellite system, which provides high precision position, velocity and times all weather and all time, plays an important role in military and civil use. The NO.1 Beidou navigation and positioning system have been implemented in China, which declared that we have own satellite navigation system, and ended the history of depending GPS entirely in the field of satellite navigation. But due to the system imperfection, it can't meet the application needs of high dynamic and high precision positioning. Therefore to establish a new generation navigation satellite system is development goal of our space technology in the near future. It contains the aspects of high-level definition and system development and application exploitation etc. This paper is devoted to the realization of satellite navigation coordinate reference system. The summary is as follows:In the dissertation we discuss the definition, realization and maintenance of navigation satellite reference system of GPS and GLONASS. We give the coordinate reference definition of our new generation navigation satellite system, which named BDSOO, and propose the methods of realization and maintenance of BDSOO.Using the GPS observation data of simulative monitor tracking station, we analysis the precision of stations coordinate.The investigation on determining the transformation parameters from PZ-90 to ITRF (or WGS84) is an important subject for navigation and positioning. The work of this paper is extended of the previous. On the basis of the International GLONASS Experiment (1GEX) BKG analysis center's more than four years PZ-90 GLONASS to ITRP daily transformation parameter results, we carry out the spectrum analysis of it by using FFT. We found that the three rotation parameters all have primary periods 293.7 days, 685.3 days and 1028.0 days with the amplitude being about 9.1~16.3mas. On the other hand, the remaining parameters also have the same long period fluctuations, but they aren't the dominant. So we conclude that the fluctuation of transformation parameters is caused by the scheme of GLONASS SCC orbit determination, and the rotations about X and Y axis have validated by reference paper [72]. The scale, translations Tx and Ty show more stable, their constant and bias terms could be neglected compared to the large mis. The fluctuation of translation Tz is similar to the rotations, and the bias term is evident, its first primary period is 293.7days, which the rotations Ry and Rz have. At the last, we recommend a set of transformation parameters based on our investigation.For enhancing the ability of survivability and auto-control, the requirement of autonomous navigation is brought forward to the formation flying spacecraft and satellite constellation. To the satellite navigation system, autonomous navigation will be an important development direction. The goal of autonomous navigation is located the absolute position of formation spacecraft in the Earth-Centered-Earth-Fixed frame and get the relative vehicle positions. This paper discuss the question of navigation satellite autonomous flight, bring forward that the key of it is navigation satellite constellation auto-orbit and auto-time determination, and also advance that using the range and angle measure data can implement it. Basing our feasibility analysis result, some useful conclusion was found out.The shortcomings of quadratic polynomial model are analyzed in secular predicting satellite clock error. Based on the gray system theory, the gray predicting model is established by making use of a few observation examples. Its result is compared with quadratic polynomial. Calculating results show that the gray predicting model remarkably improves the predicting precise of satelliteclock error, and the gray predicting model is fitter to be used in predicting the satellite clock error.