-1- NGAO System Integration and Test Plans KECK ADAPTIVE OPTICS NOTE 581 Christopher Neyman, David Le Mignant and Peter Wizinowich March 25, 2008 1. Introduction This document describes the plan for integration and testing (I&T) of the NGAO facility. The NGAO facility is composed of the following major components: • AO system • Laser system • Science operations tools • Keck Telescope and associated observatory facilities • Science instruments All of these elements are covered by this integration and test plan with the exception of the science instruments which are covered under each individual instrument’s integration and test plan. The major components correspond to major elements of the work breakdown structure (WBS) as shown in Figure 1. The WBS shown in Figure 1 uses a new numbering scheme that will be used for the next phases of the NGAO project that follow the system design phase. The reader should be warned that the number scheme of Figure 1 is different than the one used previously during the system design phase, for example KAON 414 [1]. Construction of NGAO follows the structure outlined in Figure 1. Each of the major systems is built from underlying subsystems. For example, the AO system (WBS 4) includes: • AO enclosure (WBS 4.1) • Opto-mechanical (WBS 4.2) • Alignment, calibration and diagnostics (WBS 4.3) • Non-real-time control (WBS 4.4) • Real-time control (WBS 4.5) These subsystems can be broken further into the next level of sub-elements as shown in Figure 2 for WBS elements 4.1, 4.2, and 4.3. 2. NGAO integration and test overview The sequencing of the major elements of the NGAO overall integration and test activities is shown in Figure 3. The activities in Figure 3 are approximately ordered in time from earliest to latest as you move from left to right in the diagram. The “Subsystem Development and Testing” is the first part of the overall I&T activity. The NGAO integration plan proceeds from the assumption that the lowest levels of the work break down structure 1 will be tested to verify that the components function as stand-alone units before they are combined into higher level systems. The verification of each subsystem means that it complies with specifications developed in the functional requirements document. In some cases; a single functional requirement will be allocated across many components of the subsystem. To avoid problems later during integration, the subsystems must also be shown to comply with the standards of the NGAO internal interface control documents. Throughout the remainder of the document will the term “verify” or “measure” will be used to mean a comparison of the particular system to the relevant requirements and interfaces. 1 The NGAO product breakdown structure may be more appropriate when it is complete.