AAS 98-114

OBJECT ORIENTED EPHEMERIS GENERATION IN A DISTRIBUTED COMPUTING ENVIRONMENT WITH JAVA

J. G. Kasalo - Santa Clara, CA

Abstract

This paper examines the ability of object orientated technology to expand the solution space for astrodynamic software. The well-known SGP4 propagator is re-coded in Java to utilize an object orientated architecture; performance data for several platforms is reported. This code is used to satisfy two use cases with network connections - a mobile observer and a remote tracking sensor - which illustrate the types of problems object technology can address and its benefits. Software patterns and UML (Unified Modeling Language) are employed to high light their contribution to the manageability and robustness of this technology.

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