Monitoring and Analyzing Rocket Trajectory using SVG

Joao Emile Louis
Centro Tecnico Aeroespacial
Instituto de Aeronautica e Espaco
Phone: +55 12 3947-4664 Fax: +55 12 3947-4621
Sao Jose dos Campos - Sao Paulo - Brasil
joaol@directnet.com.br

Abstract:

When you are calculating a Rocket Trajectory, a good aid is to visualize the trajectory path in a cartographic map to determine vehicle actual position. This is an important aid not only for analysis, but also for monitoring the rocket in real-time and moreover, it serves as a mean to analyze the safety conditions. Therefore the objective of this paper is to present MART (Monitoring and Analyzing Rocket Trajectory) to cope up with the above mentioned tasks. MART has been developed to make use of interoperability issues such as XML (Extensible Markup Language) more specifically SVG by enabling the visualization within the web. One of the main features of MART is the interaction with the user where a cartographic map is provided. It is possible to handle with some issues such as Launch Pad, radar, cities close to the launcher, and telemetry. The user may also insert other issues of interest as well as text and lines depicting impact point evolution, trajectory evolution, security boundary limits, cities, rivers, impact dispersion area and others. The trajectory analysis is an off-line job that will help the user to visualize and identify the flight security problems as well as rocket performance well ahead of its launch. It is worth mentioning that system functionalities include: calculation of distance between two points, zooming facilities, comparison between trajectories and visualization of both trajectory paths and impact points, including impact dispersion areas. It is possible to use analysis to perform pre-flight and post-flight for all types of rockets. Due to the use of SVG resources one can, if authorized, simulate the launching from any part of the world. It is possible to input data and obtain a real-time visualization. Zooming of the map is enabled in order to view the details of about 500 meters around the launch pad. As the map is yielded in a large scale, the actual point lays of out the map and the system automatically determines the new area where the point lies in the zoomed area. This process can go on as needed. Most of the facilities within this software package can be accessed via Adobe Viewer plugin. Javascripts and DOM have also been used. The present version makes the connection with the server through URL, and data is accepted based on Latitude and Longitude coordinates. A full animation example will be presented. It is also possible to use MART to monitor other kind of objects, like airplanes (used to check if the dispersion area is free) and balloons (used to get wind profile).

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