CxP 70007 (REV. B, CHANGE 003), CONSTELLATION DESIGN REFERENCE MISSIONS AND OPERATIONAL CONCEPTS (23 OCT 2008)

CxP 70007 (REV. B, CHANGE 003), CONSTELLATION DESIGN REFERENCE MISSIONS AND OPERATIONAL CONCEPTS (23 OCT 2008)., This document contains a set of Design Reference Missions (DRMs) which provide bounding cases for the operations envisioned to accomplish the Vision for Space Exploration (VSE). The DRMs provide a framework for developing Operations Concepts that identify key capabilities, important guiding drivers and assumptions associated with these DRMs. The Operational Concepts provide sufficient context to derive functional analysis, which drives programmatic functional requirement development. They also define performance expectations that support the formulation of non-functional requirements for the Constellation (Cx) Systems. The Operational Concepts do not define or document how the Constellation system arrives at an end architecture design implementation, and should not be construed as a requirements document. The document encompasses the top level mission scenarios and operational concepts. Project-level Operational Concepts documents provide the next level of detail envisioned for each System. The scope of this document represents the integrated stakeholder expectations and common vision for the Constellation Program Systems. The document is divided into five sections. The System Overview describes the numerous vehicles and organizations that define the Constellation Architecture. This is a summary of top-level information and is contained in numerous Constellation products. The following section describes the Design Reference Missions (DRMs). Next, a General section provides overarching concepts that span multiple phases or that are not specific to any phase, but are to be considered when developing requirements and determining effective design solutions. Next, beginning with expectations for pre-ship build and checkout of the flight vehicles through recovery and refurbishment, the concepts for nominal Operations and Capabilities by Phase, including the role of the operations systems are documented. Lastly, the operational concepts that describe all contingency scenarios that are intended to be captured in requirements for mitigation are presented. There are four Annexes to this document, which contain additional detail about communications and timelines for the DRMs. Annex 1 is the Joint Constellation (Cx) – Space Communications and Navigation (SCaN) Concept of Operations. It contains a view of the communications, tracking, and network operations that will support the DRMs. Annex 2 is the Cx Flight Operations Scenarios and includes DRM timelines and ground rules. Annex 3 is the Ground Summary Timeline. Annex 4 is the Distributed System Integration Laboratory (DSIL) Concepts of Operations document.