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Transactions: WSEAS TRANSACTIONS ON APPLIED AND THEORETICAL MECHANICS
Transactions ID Number: 89-141
Full Name: Vivian Gomes
Position: Doctor (Researcher)
Age: ON
Sex: Female
Address: Avenida dos Astronautas 1758
Country: BRAZIL
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E-mail address: vivian.gomes@uol.com.br
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Title of the Paper: Real Time Orbit Determination with Different Force Fields
Authors as they appear in the Paper: VIVIAN MARTINS GOMES, ANTONIO F. B. A. PRADO, HÉLIO KOITI KUGA
Email addresses of all the authors: vivian.gomes@uol.com.br; prado@dem.inpe.br
Number of paper pages: 10
Abstract: The Global Positioning System (GPS) is a satellite navigation system that allows the users to determine 3D positioning and the time with high precision. Its main purposes are: aid to radionavigation in three dimensions with high precision positioning, navigation in real time, time synchronization, global coverage and quick acquisition of data signal sent by the GPS satellites. In this work, it is proposed to estimate, in real time, an orbital state vector composed by position, velocity, bias and drift of the GPS receiver clock on board satellites by processing the raw navigation solution obtained by the on-board receiver. In this work the Kalman filter is used to estimate the state vector based on the stepwise incoming navigation solution from the receiver. The Kalman filter is used due to its robustness in real time applications, without unnecessary storage of observations, as they can be processed while being collected. The filter dynamic model includes perturbat!
ion due to geopotential, solar radiation pressure and perturbations due to the Sun and the Moon and the observations are the raw navigation solution composed of position and receiver clock bias. Simulations and tests are done using actual data from TOPEX/POSEIDON satellite. For performance assessment, a comparison is done between the estimated state vector and the precise orbit ephemeris (POE) produced by JPL/NASA.
Keywords: astrodynamics, artificial satellites, orbital dynamics.
EXTENSION of the file: .pdf
Special (Invited) Session: Filtering the GPS Navigation Solution for Real Time Orbit Determination Using Different Dynamical Models
Organizer of the Session: 697-261
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