Trajectory design and optimization of multistage rocket for geo insertion using astrogator

Most often used orbits for communications satellite are geostationary, low-earth orbit, Molniya and medium-earth orbit. A satellite in a geostationary orbit appears to be in a fixed position to an earth-based observer. A geostationary satellite revolves around the earth at a constant speed once per day over the equator. The geostationary orbit is useful for communications applications because ground based antennas, which must be directed toward the satellite, can operate effectively without the need for expensive equipment to track the satellite’s motion The Geosynchronous Satellite Launch Vehicle (usually known by its abbreviation, GSLV) is an expendable launch system operated by the Indian Space Research Organisation (ISRO). It was developed to enable India to launch its INSAT-type satellites into geostationary orbit and to make India less dependent on foreign rockets One common method of placing satellites into geostationary orbit is based on the Hohmann transfer principle. Using this system the satellite is placed into a low earth orbit with an altitude of around 300 kilometers. Once in the correct position in this orbit rockets are fired to put the satellite into an elliptical orbit with the perigee at the low earth orbit and the apogee at the geostationary orbit. When the satellite reaches the final altitude the rocket or booster is again fired to retain it in the geostationary orbit with the correct velocity. Alternatively the satellite is launched directly into the elliptical transfer orbit, typically between 200km and several thousand kilometres from the Earth. Again when the satellite is at the required altitude the rockets are fired to transfer it into the required orbit with the correct velocity In this project, to design a GEO launch I am using Systems Tool Kit (formerly Satellite Tool Kit), often referred to by its initials STK, is described as a physics-based software package from Analytical Graphics, Inc. that allows engineers and scientists to perform complex analyses of ground, sea, air, and space assets, and share results in one integrated solution. The objective of the project is to design and optimize a trajectory for GEO Orbit insertion and then successfully design a tool that helps in visualizing the trajectory. The trajectory design tool is created by interfacing C# along with SYSTEM TOOL KIT (STK). The tool is a Graphical User Interface (GUI); this will not only help in visualizing the trajectory but also will help in planning the future missions