Speaker
Mr
Abdul Manarvi
(Embry-Riddle Aeronautical University)
Description
Positioning a spacecraft or a satellite in a predefined orbit was and is still considered as one of the most important process of any space mission design for military or commercial purposes. A need to prepare a comprehensive review of investigations conducted in this area was realized. Therefore present research was narrowed down to most significant contributions in the area of Global Positioning Systems applications only. Research work from 1988 to 2015 only has been included in this paper. It was observed that findings from 1988 start off fruitfully, with sub-meter orbit accuracy. Data from orbit determination agrees with Very Long Baseline Inferometry (VLBI) solutions. Most investigations focused on increasing accuracy of prediction through minimization of errors. Various orbit estimation strategies, process noise models for atmospheric fluctuations, combine processing of GPS phase and pseudo-range data were investigated in this period. It was also observed that Orbit modeling is not restricted to one type of orbit rather it included distinct categories. Such as low circular orbiters with altitudes up to a few thousand kilometers; Elliptic orbiters whose perigees are as low as a few hundred kilometers, and apogee's are as high as tens of thousands of kilometers. Finally, highly circular orbits were investigated with altitudes over tens of thousands of kilometers resembling geosynchronous satellites. This paper can be used as foundation for further investigations in Global Positioning Systems.
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Primary author
Mr
Abdul Manarvi
(Embry-Riddle Aeronautical University)
