Attitude Data Messages - CCSDS
Attitude Data Messages - CCSDS
Attitude Data Messages - CCSDS
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<strong>CCSDS</strong> RECOMMENDED STANDARD FOR ATTITUDE DATA MESSAGES<br />
B3<br />
APPLICABILITY OF CRITERIA TO MESSAGE OPTIONS<br />
The selection of one particular message will depend on the optimization criteria in the given<br />
application. Table B-4 compares the two recommended messages in terms of the relevant<br />
selection criteria identified by the <strong>CCSDS</strong>:<br />
Table B-4: Applicability of the Criteria to <strong>Attitude</strong> <strong>Data</strong> <strong>Messages</strong><br />
Criteria<br />
Modeling Fidelity<br />
Human Readability<br />
Remote Body<br />
Extensibility<br />
Lander/Rover<br />
Compatibility<br />
Definition<br />
Permits modeling of any dynamic<br />
perturbation to the attitude.<br />
Provides easily readable message<br />
corresponding to widely used attitude<br />
representations.<br />
Permits use for assets on remote solar<br />
system bodies.<br />
Applicable<br />
to APM?<br />
N<br />
Y<br />
Applicable<br />
to AEM?<br />
Permits exchange of non-orbit attitudes. Y Y<br />
Y<br />
Y<br />
Y<br />
Y<br />
B4<br />
SERVICES RELATED TO THE DIFFERENT ATTITUDE DATA MESSAGE<br />
FORMATS<br />
The different attitude data messages have been distinguished by their self-interpretability.<br />
Both attitude data messages provide for recognizing the boundaries of the attitude data fields<br />
and thus can transfer each field, as a block, to another location. The different services that<br />
can be achieved without special arrangements between users of the <strong>CCSDS</strong> attitude data<br />
messages are listed in table B-5.<br />
Table B-5: Services Available with <strong>Attitude</strong> <strong>Data</strong> <strong>Messages</strong><br />
Service<br />
Definition<br />
Applicable to<br />
APM?<br />
Applicable<br />
to AEM?<br />
Absolute <strong>Attitude</strong><br />
Interpretation<br />
State availability at specific times for use in additional<br />
computations (geometry, event detection, etc.).<br />
Y<br />
Y<br />
Relative <strong>Attitude</strong><br />
Interpretation<br />
Trajectory comparison and differencing for events<br />
based on the same time source.<br />
Only at time<br />
specified at Epoch<br />
Y<br />
<strong>CCSDS</strong> 504.0-B-1 Page B-4 May 2008
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