Path: CubeSat/Simulation
% Radiation pressure model for a CubeSat around the Earth.
Includes solar pressure, earth radiation pressure, and earth albedo.
Has a built-in demo. Retrieve a default data structure
by calling with no inputs, or append the additional fields to an
existing structure. Set d.planet to 0 (false) to ignore planetary disturbances
and calculate only solar pressure.
--------------------------------------------------------------------------
Forms:
[force, torque] = CubeSatRadiationPressure( p, d )
d = CubeSatRadiationPressure % default d
d = CubeSatRadiationPressure( d ) % add needed fields to d
CubeSatRadiationPressure %
--------------------------------------------------------------------------
------
Inputs
------
p (.) Data structure from CubeSatEnvironment
.r (3,1) ECI position
.v (3,1) ECI velocity
.q (4,1) ECI to body quaternion
.uSun (3,1) ECI sun unit vector
.solarFlux (1,1) Solar flux at position (W/m2)
.nEcl (1,1) Normalized source intensity from Eclipse
.radiation (1,1) Planet radiation
.albedo (1,1) Planet albedo fraction
.radiusPlanet (1,1) Planet radius (km)
d (.) Surface data structure
.nFace (3,:) Face outward unit normals
.rFace (3,:) Face vectors with respect to the origin
.cM (3,1) Center of mass with respect to the orgin
.area (1,:) Area of each face
.sigma (3,:) Radiation coefficients [absorbed;
specular; diffuse]
.planet (1,1) Flag for planetary contributions
.att (.) Attitude data structure
-------
Outputs
-------
force (3,1) ECI force (N)
torque (3,1) Body fixed torque (Nm)
--------------------------------------------------------------------------
See also SolarF, CubeSatAttitude
--------------------------------------------------------------------------
Common: Graphics/AddFillToPlots Common: Graphics/Plot2D Common: Graphics/TimeLabl Common: Quaternion/QForm Common: Quaternion/QTForm CubeSat: Simulation/CubeSatEnvironment CubeSat: Utilities/CubeSatAttitude CubeSat: Utilities/CubeSatFaces Math: Linear/Cross Math: Linear/Unit SC: BasicOrbit/RVFromKepler SC: Disturbances/SolarF SC: Ephem/Eclipse
Back to the CubeSat Module page