Abstract
This paper describes a domain-specific language prototype developed for the NASA Constellationlaunchcontrolsystemproject.Akeyelementofthelaunchcontrolsystemarchitecture,thedomain-specificlanguageprototypeisaspecializedmonitorandcontrollanguage composed of constructs for specifying and programming test, checkout, and launch processing applications for flight and ground systems. The principal objectives of the prototyping activity were to perform a proof-of-concept of an approach to ultimately lower the lifecycle costs of application software for the launch control system, and to explore mitigations for a number of development risks perceived by the project. The language has been implemented as a library that extends the dynamically-typed Python scripting language, and validated in a demonstration of capability required for Constellation.A study of the statically typed Scala programminglanguageasanalternativedomain-specificlanguageimplementationlanguage is also presented.
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