Voir la source de Catégorie:User Manual 3.4.1 Attitude


== Introduction ==
This section describes attitude features of Patrius: attitude laws, slew, guidance, etc.

== Applicable and Reference Documents ==
=== Applicable Documents ===

'''[A1]'''      ''CDCF - Fonctions de Base du Patrimoine de Dynamique du Vol'', V1.2, SIRIUS-CF-DV-0049-CN, 2011.<br>
'''[A2]'''      ''Dossier de réutilisation Orekit et Commons Math'', V1.0, SIRIUS-DLR-DV-0080-CN, 2010.

=== Reference Documents ===

None applicable.

== Overview ==
The Attitude package of the PATRIUS library has been developed according to the SIRIUS Scope Statement '''[A1]'''. The themes developed are described hereafter :

; Directions
: Implementation of directions of space that can evolve in time.

; Attitude laws
: Several attitude laws are available. These laws were originally designed for orbit determination needs: in order to broaden their applications, a wrapper object has been created to meet the spacecraft attitude field needs.

; Attitudes sequence
: Implementation of an attitudes sequence for orbit determination: it is possible to define an attitude law as a series of attitude laws in the context of a propagation.

; Attitude legs sequence
: Implementation for spacecraft attitude field of an attitude sequence: it is possible to define an attitude leg as a series of attitude legs.

; Attitude composition
: Implementation of an object that enables to define an attitude law as a composition of several laws.

; Slew
: Implementation of slew. Slews are used in the attitudes sequence to define the transition between two laws.

; Kinematics
: Implementation of a tool box for kinematics calculations.

; Guidance command
: Implementation of the ground and the on-board guidance commands. The first one is computed, the second one is simulated. In both cases, it should be possible to compute the guidance command from a law and to consider the guidance command itself as a law.

[[File:AttitudeLawDiagram.png|center]]
[[Category:User_Manual_3.4.1]]