Study on preliminary orbit determination

Deepthi, K S (2014) Study on preliminary orbit determination. Masters thesis, Manipal Institute of Technology, Manipal.

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The process of formulating a first approximation to fundamental elements or parameters that define an orbit is known as Preliminary Orbit Determination (POD). As the name indicates the orbit is determined with minimum inputs. POD is needed whenever a new object is detected from a ground-based or space-based observer, so that possible future collisions can be avoided. The choice of the most suitable preliminary orbit determination methods depends strongly on the type and distribution of available measurements, and is still an on-going discussion, even though methods for satellite orbit determination were devised in the earlier days of spaceflight In this thesis work, three methods are considered: The Gauss method, The Gibbs method and The Herrick-Gibbs method. The algorithms are developed for the same, the readings of different satellites in different orbits are considered and results are compared The results show that, Herrick-Gibbs method works better in LEO, Gibbs method works better for molniya orbits and Herrick-Gibbs and the Gauss method is suitable for GEO depending on arc length at a particular time interval Due to the problem of linearization a particular method is best suitable for a particular orbit.

Item Type: Thesis (Masters)
Subjects: Engineering > MIT Manipal > Instrumentation and Control
Depositing User: MIT Library
Date Deposited: 13 Nov 2014 10:39
Last Modified: 13 Nov 2014 10:39

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