System definition of the James Webb Space Telescope (JWST) Integrated Science Instrument Module (ISIM)

Abstract

The Integrated Science Instrument Module (ISIM) for the James Webb Space Telescope (JWST) provides the critical functions and the environment for the four science instruments on JWST. This complex system development across many international organizations presents unique challenges and unique solutions. Here we describe how the requirement flow has been coordinated through the documentation system, how the tools and processes are used to minimize impact to the development of the affected interfaces, how the system design has matured, how the design review process operates, and how the system implementation is managed through reporting to ensure a truly world class scientific instrument compliment is created as the final product.

Updates to the optical alignment and test plan for the James Webb Space Telescope integrated science instrument module

“…The instrument suite also includes the Fine Guidance Sensor (FGS Guider) [2]. Together, the SIs and supporting subsystems are the Integrated Science Instrument Module (ISIM) element [3]. Other components of the JWST observatory include a spacecraft and a sunshade that provides part of the passive cooling system for the science payload.…”