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2016 | OriginalPaper | Chapter

3. Data Handling and Control Concept

Authors : Ulrich Mohr, Bastian Bätz, Jens Eickhoff

Published in: The FLP Microsatellite Platform

Publisher: Springer International Publishing

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Abstract

This chapter addresses all the fact on the onboard software which an operator needs to know when controlling an FLP-based spacecraft from ground. The implemented onboard software objects tree is explained, from low level device handlers to the top level system object. Furthermore the command/reply flow through the onboard software and the onboard software object types are treated. The object modes and the specifics of controller objects are covered and many further details on object IDs, their addressing in commands and also on the onboard software dynamic architecture like tasks, cycle times and the polling sequence table and crash handling.

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Footnotes
1
Real-Time Executive for Multiprocessor Systems—developed by NASA in 1988. The Real-Time Executive for Multiprocessor Systems or RTEMS is an open source fully featured Real Time Operating System (RTOS) that supports a variety of open standard Application Programming Interfaces (API) and interface standards—see [81].
 
2
The latter being specific for each mission and not treated here in this platform Flight Operations Manual.
 
3
Example—RW interface and MGM interface: Both interfaces are RS-422 standard. The RWs supports a data rate of 9.6 kBit/s whereas the MGMs support 115.2 kBit/s.
 
Metadata
Title
Data Handling and Control Concept
Authors
Ulrich Mohr
Bastian Bätz
Jens Eickhoff
Copyright Year
2016
DOI
https://doi.org/10.1007/978-3-319-23503-5_3

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