Path: FormationFlying/IntegratedSim
% Generate a reference quaternion for a variety of targets. There
are six types of target
'latlon' - point a spacecraft vector at a specific latitude
and longitude of the earth. The angle about
the vector is ignored
'sun' - point a spacecraft vector at the sun. The angle about
the vector is ignored
'lvlh' - align the spacecraft with LVLH
'eci' - align with respect to ECI
'ulvlh' - align with a unit vector defined in the lvlh frame
'ueci' - align with a unit vector defined in the eci frame
'target' - align with a target spacecraft
The output is the target qECIToBody.
------------------------------------------------------------------------
Form:
qTarget = FSWAttitudeTarget( type, d, t )
------------------------------------------------------------------------
------
Inputs
------
type (1,:) Type of target
d (1,1) Data structure with spacecraft information
.qECIToBody (4,1) Current quaternion
.rECI (3,1) ECI position vector
.vECI (3,1) ECI velocity vector
.jD (1,1) Julian date
t (1,1) Data structure with target information
.latitude (1,1) Geodetic latitude (rad)
.longitude (1,1) Longitude (rad)
.u (3,1) Unit vector in the body frame
.qOffset (4,1) Offset quaternion (lvlh and eci only)
.uTarget (3,1) Target vector in the reference frame
INVALID: .rTarget (3,1) Target ECI position vector
-------
Outputs
-------
qTarget (4,1) Target qECIToBody
------------------------------------------------------------------------
AC: ACData/ACTConstants AerospaceUtils: Coord/LatLonToR AerospaceUtils: Coord/QLVLH SC: Ephem/EOfE SC: Ephem/EarthNut SC: Ephem/EarthPre SC: Ephem/EarthRot SC: Ephem/GMSTime SC: Ephem/MSidDay SC: Ephem/NutDelta SC: Ephem/ObOfE SC: Ephem/SunV1 SC: Ephem/TruEarth SC: SCData/sCTConstants Common: CommonData/Constants Common: CommonData/SwooshWatermark Common: CommonData/xSplashSmall Common: Database/Constant Common: General/CellToMat Common: General/DeBlankLT Common: General/DeleteCell Common: General/MatToCell Common: General/Watermark Common: Graphics/Axis3D Common: Graphics/NewFig Common: Graphics/Plot2D Common: Graphics/PltStyle Common: Graphics/XLabelS Common: Graphics/YLabelS Common: Graphics/ZLabelS Common: Quaternion/Mat2Q Common: Quaternion/QForm Common: Quaternion/QMult Common: Quaternion/QTForm Common: Quaternion/U2Q Common: Time/DTSToDTA Common: Time/Date2JD Common: Time/JD2000 Common: Time/JD2T Common: Time/JDToMidnight Math: Geometry/Perpendicular Math: Linear/Cross Math: Linear/Dot Math: Linear/DupVect Math: Linear/Mag Math: Linear/Unit Math: MathUtils/R2P5 Math: Trigonometry/CosD Math: Trigonometry/SinD
Back to the FormationFlying Module page