System for the Scientific Payload Information Support (SIOK)
SIOK has been designed for controlling scientific payload of the “Phobos-Grunt” spacecraft. SIOK is a backup computer with an extended nonvolatile memory.SIOK provides for the solution of the following tasks:
- - reception of digital commands and onboard time code from the s/c housekeeping systems via data backbone between SIOK and s/c;
- - transferring of the digital control commands and onboard time code via internal data backbone between SIOK and scientific instrumentation;
- - collection and storage in permanent memory of data acquired by the s/c scientific instrumentation; and
- - translation of scientific instrumentation data from memory to the s/c radio system during communications sessions.
Main characteristics
| Power supply voltage range, V | 23-32 |
| Power consumption, W | less than 4,0 for 27 V |
| Mass, kg | 1,7 |
| Dimensions, mm | 179x170x68 |
| Nonvolatile data memory, MB | 32 |
| Program memory, kB | 128 |
| Program RAM , MB | 2 |
| Data exchange interfaces | MIL STD-1553B |
| Failure-free operation probability | 0,97 |