MSFC-SPEC-2948 VOL 2 CHG NOTICE 1

Abstract

This document is identified as UDC-SPEC-2000 Volume 2, the Command and Data Handling (C&DH) Software Requirements Specification (SRS) for the Utilization Development Capability (UDC), Command and Control (C&C) Multiplexer/Demultiplexer (MDM) Simulator. The C&DH SRS for the UDC is being developed in six volumes. Volume 1 is a top-level document that contains requirements and information needed for the overall simulation of the C&DH system. The remaining volumes correspond to the major components of the C&DH system. Volume 2 describes the simulation of the C&C MDM, Volume 3 describes the Payload (PL) MDM, Volume 4 describes the Payload Ethernet Hub/Gateway (PEGH), and Volume 5 describes the Automated Payload Switch (APS). This specification establishes the operations, design, and development requirements for the International Space Station (ISS) C&DH subsystem simulation model that will execute in the UDC Host Computer System (HCS) to support the ISS Ground Support Personnel Training. The specification was prepared and will be maintained in accordance with the MIL-STD-498, which is a merger of DOD-STD-2167A and DOD-STD-7935A, and defines a set of activities and documentation suitable for the development of the C&DH simulation.