

For example, tasking an individual with overall responsibility for science/ software/hardware integration is a key step to ensuring effective integration between these elements.
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Through this process we have identified some lessons that have general applicability to the development of software for ground-based instrumentation. A model-based systems engineering methodology is being used to develop a preliminary design that meets these requirements. The device control packages must integrate tightly with the state-machine driven software and controls reference architecture designed by the GMT Organization. A formal, but ultimately pragmatic approach is being used to establish a complete and correct set of requirements for both the G-CLEF device control and operational support packages. The IDCS is also tasked with providing operational support packages that include data reduction pipelines and proposal preparation tools.

The G-CLEF instrument device control subsystem (IDCS) provides software control of the instrument hardware, including the active feedback loops that are required to meet the G-CLEF PRV stability requirements. The Giant Magellan Telescope (GMT)-Consortium Large Earth Finder (G-CLEF) is a fiber-fed, precision radial velocity (PRV) optical echelle spectrograph that will be the first light instrument on the GMT.
Onyuksel, Cem Paxson, Charles Plummer, David A. Software requirements flow-down and preliminary software design for the G-CLEF spectrographĮvans, Ian N.
