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This paper presents an approach to resolve integer ambiguity of GPS carrier phase difference between two antennas separated by the baseline length. An approached algorithm based on Gram-Schmidt Orthonormalisation associated with Genetic Algorithm (GA), is proposed for medium length baseline observations. The proposed approach was exploited to reduce the dimensional search space and number of search...
This paper presents an operational approach for determining satellite attitude from carrier phase GPS (Global Positioning System) measurements. A conventional recursive least square (RLS) estimator was implemented without requiring spacecraft dynamics. The proposed approach can be applicable for general space missions, particularly for real-time operation onboard-spacecraft. The attitude angles and...
A new approach to resolve integer ambiguity and achieve instantaneous spacecraft attitude from phase information of Global Positioning System (GPS) signals, without requiring independent attitude information from traditional attitude sensors is presented. A newly approached algorithm based on Gram-Schmidt orthonormalisation (GSO) is proposed for medium length baseline observations. By using a newly...
This paper presents the orbit determination of low- Earth orbit (LEO) spacecraft from code information of Global Position System (GPS) signals. An extended Kalman filter was implemented to estimate the position and velocity of the spacecraft. The effect of second harmonic, J2, of the Earth's oblateness was included in the system model. The estimated results were evaluated by the reference solutions...
This paper presents a new approach to resolve integer ambiguity and achieve instantaneous spacecraft attitude from phase information of global positioning system signals, without requiring independent attitude information from traditional attitude sensors. A newly approached algorithm based on Gram-Schmidt orthonormalisation is proposed for medium length baseline observations. Using an attitude algorithm...
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