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A command and data subsystem for deep space exploration based on the rca 1802 microprocessor in a distributed configuration
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Thomas, J. S. |
| Copyright Year | 1980 |
| Description | The Command and Data Subsystem (CDS) is an RCA 1802microprocessor based subsystem that acts as the central nervous system for the Galileo Orbiter Spacecraft. All communication between the ground and spacecraft flows through the CDS. The CDS also distributes commands in real time, algorithmetrically expanded from a data base loaded from the ground and in response to spacecraft alarms. The distributed microprocessor system is configured as a redundant set of hardware with three microprocessors on each half. The microprocessors are surrounded by a group of special purpose hardware components which greatly enhance the ability of the software to perform its task. It is shown how the software architecture makes a distributed system of six microprocessors appear to each user as a single virtual machine, and collectively as a set of cooperating virtual machines that prevent the simultaneous presence of the several users from interfering destructively with each other. |
| File Size | 141062 |
| Page Count | 4 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19810003139 |
| Archival Resource Key | ark:/13960/t9h46jb2n |
| Language | English |
| Publisher Date | 1980-01-01 |
| Access Restriction | Open |
| Subject Keyword | Computer Operations And Hardware Microprocessors Galileo Project Backups Microcomputers Data Processing Redundant Components Galileo Spacecraft Computer Programs Microprogramming Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
