SC Module

Directory List

Actuator

AirCoreMagneticTorquerDesign	Design a minimum mass air core magnetic torquer.
BDDesign	Designs a blowdown system.
BLDCMFlux	Brushless DC Motor back emf.
BLDCMFriction	Brushless DC Motor friction
BLDCMInverter	Brushless DC Motor commutation using a 6 switch inverter.
BLDCMRHS	Brushless DC Motor simulation
BatteryDesign	Size a battery given an orbit and planet.
BatterySize	BatterySize Battery sizing for a given orbit and array power.
BloDown	Generates a blowdown curve.
CMG	Simple CMG model. Assumes a tach loop controls the CMG momentum.
EffPw	Computes the effective pulsewidth given the rise and fall times.
Friction	Computes friction torques based on a model with an exponential term.
FrictionBristle	Friction model. This model uses a bristle state.
FrictionSmooth	Rotary wheel friction model using differentiable functions.
HydrazineThruster	Computes the thrust and fuel consumed for thrusters.
MagAirC	Designs an air coil by minimizing a weighted combination of power and mass.
MagTComp	Performs a tradeoff of magnetic torquers versus thrusters.
MagneticFieldDipole	Computes the magnetic field of a dipole
MagneticTorquerDesign	Design a minimum mass magnetic torquer.
MagneticTorquerDipoleMoment	Compute the moment for a magnetic torquer.
MomArm	Computes the moment arms for a set of thrusters.
PWMSeq	Generate a pulsewidth modulated sequence given x.
PlotHysteresis	Create hysteresis plots.
PropellantMass	Compute the propellant mass and pressurant mass for a tank.
RHSFriction	Computes dynamics with friction for two different models.
RWA	A reaction wheel model using FrictionSmooth.
RWABristle	A RWA model using FrictionBristle to model the wheel friction.
RWAMnvrSizing	Size a reaction wheel using maneuver requirements.
RWASpec	Calculates RWA parameters from spec sheet parameters.
ReactionWheelFriction	Computes the friction for a reaction wheel.
ReactionWheelStress	Reaction wheel strength and momentum.
RocketEquation	Compute the final mass from the rocket equation.
SingleAxisDrive	Model a stepping motor drive.
SingleAxisLinearDrive	Model a single axis drive with the motor dynamics modeled by a lag.
StepSim	Simulates a two phase stepper motor.
TankVolume	Computes fuel mass from tank volume.
ThrusterAndRWACommand	Computes forces and torques for RWAs and thrusters using off-pulsing.
ThrusterColdGas	Cold gas thruster propulsion system
URWAPyramid	Generate unit vectors for a RWA pyramid.

Attitude

AStarAttitudeTrajectory	Compute a trajectory to avoid stayout zones using AStar
AddMassDot	Add mass and mass derivatives using the mass data structure.
AngRate	Computes the magnitude of the angular rate of the momentum vector
AngleDetermination	Model to produce roll, pitch and yaw from nadir and magnetic field
ArcEff	Arc efficiency from spin rate and pulsewidth.
AttitudeProfilePlots	Make time history plots of an attitude profile. See AttitudeProfileWithCon.m
AttitudeProfileVis	Visualize an attitude profile with constraints.
AttitudeProfileWithCon	Build a constrained attitude profile consisting of multiple overlapping modes.
AttitudeTarget	Generate a reference quaternion for a variety of targets.
CMGAMatrix	Computes the transfer matrix from gimbal rates to torques.
DSTCrit	Compute dual spin turn rates
DSpnStab	Computes the dual spin stability.
DWheel	Computes the damping coefficient ratio for a damper wheel.
DblPivot	Computes the unit normal for a double pivoted assembly.
DeltaQTarget	Generate a target quaternion by limiting the total angular change.
DeltaRate	Computes the new angular rate when the inertia changes.
FPB	Integrand for pointing budgets.
GetModes	Extract flex modes from a finite element modal transformation matrix.
GimbalC	Generate gimbal commands for a gimbal stationkeeping system.
GroundTrackErrorBudget	Generate a ground track error budget.
IC3X326	Convert 3x3 inertia matrix to [Ixx Iyy Izz Ixy Ixz Iyz].
InertiaTotal	Computes the new inertia and body rate when appendages change discretely.
LibrationFrequency	Compute the libration frequency from inertia and orbit rate.
LoadFlex	Reads in flex data from a formatted text file.
ManeuverCostSphere	Maneuver cost on a sphere
NPSPM	Computes a spin precession maneuver using a rhumb line precession.
PBudget	Computes a pointing budget over n categories.
PCentr	Calculates the time from pulse start to the centroid.
PPDelay	Compute the pulse pair delay for a Spin Precession Maneuver.
PermanentMagnetRHS	Right-hand-side for attitude dynamics with a permanent magent
PointingBudgetGUI	Creates pointing budgets using a GUI.
PointingBudgetLatex	Computes a pointing budget over n categories.
QAlignWithCon	Rotate about a body axis to align a body vector with an inertial vector
QRotateToAlignWithCon	Calculate the alignment quaternion while applying constraints
RLP	Rhumb line precession
RLPMnvr	Simulate a rhumb line precession.
RW2SDev	Converts random walk measured over dT to standard deviation.
RYDyn	Generates open loop four channel magnitude plots for roll/yaw dynamics.
SkewDipl	Computes the skew angle for a single dipole used to control yaw and roll.
SumRXF	Sum a set of torques produced by summing T = rxF
SunVectorPointing	Compute the angles to align the solar wing normal with the sun
TwoUToQ	Finds the quaternion that transforms u1 and u2 to u1T and u2T
VXPhi	Take the cross product a matrix of vectors times a flex transformation matrix.

Control

ACSRWAAndTorquers	Control system
AltitudeHold	Altitude hold for a lander
PID3Axis	A PID-based 3 axis controller for rigid body.
ThrusterCommand	Computes forces and torques for a set a thrusters using off-pulsing.

DemoFuns

Dyn	Returns the mass and right hand side of the dynamics equations.
DynP	Returns the mass and right hand side of the dynamics equations.
FIC	Sliding mass on a pendulum using independent coordinates
FICP	Single pendulum using independent coordinates
FRWABristle	RWA model
FRY	Roll/yaw simulation RHS
FRYSim	Roll/yaw simulation right hand sidd
FSRHS	Compute smooth friction RHS.
FTBRef	Right hand side of the two body equations.
HRY	Measurement equation for a roll/yaw controller.
HysteresisOutput	Gather output from the hysteresis damping simulation
KConst	The constraint equations and Jacobians.
KConstP	The constraint equations and Jacobians. The outputs are
KConstQ	The constraint equations and Jacobians.
QMultJPL	Q2 transforms from A to B and Q1 transforms from B to C
ThreeAxisControlDisturb	Computes solar disturbances for ThreeAxisControl.m

Demos/Actuator

BLDCMDemo	Brushless DC motor simulation.
BristleFrictionSim	Demonstrate the bristle friction model with a velocity ramp.
CMGDemo	Demonstrate the use of CMGs. Shows how to use a pseudo inverse to distribute torques.
DesignAirCoreTorquer	Design and draw an air core magnetic torquer
FrictionComparisonSim	Compare friction models
PivotDemo	Simulates a pivot rotation.
RWABristleSim	Test the reaction wheel model with bristle friction.
RWASim	Simulate a RWA with a PI rate controller.
SmoothFrictionDemo	Demonstrate the use of the smooth friction model

Demos/Attitude

Attitude3D	Simple sim using a CAD model of the spacecraft to view the attitude.
AttitudeProfileConstraintsDemo	Demonstrate the AttitudeProfileWithCon function.
CubeSatSurfaceModelforDSim	Generates the surface properties needed by DSim for a simple CubeSat 3U.
CubeSatWithRWADemo	Simulate an ACS with reaction wheels
DisturbanceModelComparison	Comparison of CubeSat and SCT Disturbance models
ExamplePointingBudget	Demonstrate a pointing budget using PBudget.
GimbalControl	Tests a gimbaled thruster stationkeeping control system.
JitterDemo	Displays different kinds of jitter.
LVLHRateDemo	Demonstrate LVLH angular rate for an eccentric orbit
REAControl	Implements a thruster control system. Uses a CAD model of the spacecraft.
RollYawControl	This script explores different roll/yaw controllers.
SCTTutorial	Implements a spacecraft control tutorial.
SpacecraftWithIMUDemo	3-axis spacecraft with an IMU simulation
TPDRes	Study pulse resolution.
Timeline	Space Shuttle attitude timeline

Demos/CAD

Build3UCubeSat	Build a 3U Cubesat using AddCubesatComponent
BuildAgileSat	Design the Small Agile Satellite CAD model with solar arrays and propulsion
BuildCassini	Create the Cassini CAD model from DXF data
BuildComsat	Build up a model of a geosynchronous communications satellite.
BuildCylinders	Demonstrate CAD geometry (vectors and rotations) using cylinders.
BuildDXF	Loads in dxf data for Cassini and Huygens, and saves data to mat-files.
BuildFlatPlates	Simple model with two thin plates.
BuildISSCADModel	Create a CAD model of the ISS
BuildLunarModule	Generates a lunar module model.
BuildMAP	Build a model of the Microwave Anisotropy Probe.
BuildNanoSat	Make a detailed demonstration nano-spacecraft with two solar arrays.
BuildSCModelForImaging	Creates a model for the thermal demo.
BuildSatWThrusters	A very simple spacecraft with thrusters and one sensor.
BuildSimpleSat	A very simple spacecraft with one sensor.
BuildSolarSail	Build a solar sail model using BuildCADModel.
BuildSubassembly	Load a dxf file and save it as a subassembly.
BuildTwoArraySC	Make a detailed demonstration spacecraft with two solar arrays.
BuildXYZSat	A very simple 'XYZ' spacecraft with six panels and axes.
CADColorDemo	Demonstrate CADColor
Canadarm3Movie	Make a movie of the DrawCanadarm3 model through a sequence of rotations
CassiniColorDemo	Demonstrate CADColor using the Cassini orbiter.
CassiniSim	Draws a picture of the Cassini orbiter, Huygens probe, Saturn, and Titan.
GravGradCubeSat	Generates a CubeSat model that is gravity gradient stabilized.
MarsLandingAeroshells	Create and draw Mars Aeroshell model
ShuttleSim	Simulate the space shuttle model.

Demos/Control

CMGSimulation	CMG demo
EarthTargetPointingSim	Point at an earth target and spin about the pointing vector.
MAPControlSim	Implements and simulates the MAP normal mode control.
NadirSunPointingDemo	An attitude and orbit simulation with reaction wheels.
NutationDampingDemo	Demonstrate controlling nutation and the momentum axis of a spacecraft
SCPointingDemo	Demonstrate a spacecraft in orbit pointing at a target on the Earth
SolarMomentumControl	Controls the momentum in a spacecraft using solar pressure.
SpacecraftWithRWADemo	An attitude and orbit simulation with reaction wheels.
TelescopePointingSim	Simulate a momentum bias spacecraft with a telescope on a roll pivot
ThreeAxisControl	Implements and simulates a spacecraft with reaction wheels and thrusters.
VectorTracking	Demonstrate vector tracking using PID3Axis.

Demos/Disturbances

AccommodationDrag	Compare simple drag with surface accommodation over a 3D model
AccommodationFlatPlate	Surface accommodation drag demo on a flat plate
CylinderFreeMolecularFlow	Surface accommodation drag on a cylinder
DisturbanceBatchDemo	Run the disturbance model for a spacecraft with two rotating arrays.
DisturbanceFlatPlate	Disturbance analysis of two thin plates.
DisturbancesSim	Simulation using the full disturbance model
SCDisturb	Demonstrate disturbance modeling with shadowing.
SphereFreeMolecularFlow	Surface accommodation drag on a sphere

Demos/Dynamics

ConstDyn	Example 4.2 and 4.3 in the reference.
NutationAnimation	Demonstrates rigid body rotation.
NutationSim	Demonstrates nutation and generates an STK attitude file.
RobotArm	Six body simulation of a spacecraft with a robot arm.
TTB	Demonstrate two body dynamics using the two body dynamics model.
TreeCAD	Three body simulation with initialization using the CAD tools.
TreeSim	Three body simulation. The bodies are connected
WireSimG	This script demonstrates the deployment of the wire from the spacecraft.

Demos/Environs

AtmosphereModelCompare	Compares atmosphere models
BDipoleVsBMF	Compare the dipole model to the MF model
DataGenNRLMSISE	This file is used to generate data for AtmNRLMSISE.m
J70SolarCycle	Demonstrate the J70 atmosphere model over a solar cycle.
J70SunDemo	Demonstrate the J70 atmosphere model.
MagneticFieldDemo	Compare the magnetic field models.
NRLMSISTest	This file replicates the test case from the reference
SolarFluxDemo	Solar flux variation over Earth orbit.

Demos/Ephemeris

EclipseDurationSunSync	Dawn-Dusk SSO eclipse calculations
ExampleLEOAnalysis	Demonstrate simple orbit and attitude ephemeris analysis
TEarth	Demonstrate earth nutation, precession and rotation.
TEclipse	Computes eclipses.
TPlanets	Demonstrate the planets model.
TerminatorLineDemo	Animate the terminator line through a year

Demos/GOESRead

GOESDemo

Demonstrates the GOES Toolbox functions.

Demos/GUIPlugIn

UseREA.mat	Command list to use thrusters
UseREAForDV.mat	Command list to use thrusters for velocity change
UserREAForDV2.mat	Command list to use thrusters for velocity change
CommandPluginDemo	Demonstrate command lists
LaunchGUIDemo	Launch the GUI plug in demo. See the GUIPlugIn folder for the function.

Demos/MagneticControl

MagControl	Demonstrate the magnetic control functions in batch mode.
MagSim	Simulate a momentum bias spacecraft with magnetic roll/yaw control.
MagneticControlSim	Demonstrates magnetic control.
MagneticControlSimWithPower	Demonstrates magnetic control and power profiles.
PermanentMagnetSim	Simulate the attitude of a rigid spacecraft with permanent magnet in LEO

Demos/Sensor

GyroDemo	Test the gyro model.
TGyro	Simulate various single degree of freedom gyros.

Demos/SystemDesign

LaunchCost	Launch Costs
ProgramCosts	Compute program costs
SCDisturbanceAnalysis	Run the disturbance model in GEO. Uses TwoArraySC.mat
SCFuelBudget	Generate the Spacecraft Fuel Budget.
SCMassBudget	Create a mass budget from a CAD file (SCwRWA.mat)

Disturbances

AddSurf	Add a surface to the data structure.
AeroDragForce	Calculate the drag force in the ECI frame assuming constant area.
AeroF	Compute the aerodynamic forces on a set of elemental areas.
Disturbances	Compute the total force and torque on a spacecraft generated by the CAD package.
FAeroSurfaceAccommodation	Computes the aerodynamic force using surface accommodation coefficients.
FGravityGradientStiffness	Gravity gradient for a rigid body with small offsets from LVLH.
GravityGradientFromR	Computes a gravity gradient torque from r and mu.
GravityGradientStiffness	Computes gravity gradient stiffness from inertia and orbit rate.
OpticalSurfaceProperties	Returns optical surface properties for selected materials.
SaveSurfacePropertiesDSim	Save surface properties to the file
SolarF	Compute the solar force on a set of elemental areas.
TGG	Computes a gravity gradient torque.
TRD	Computes residual dipole torques.
TRF	Computes an RF torque for a set of antenna.
TSolarP	Generates solar pressure torques with shadowing.

Dynamics

ASim	Attitude simulation of a rigid body.
ConstraintForceAndTorque	Computes the constraint forces and torques.
DIModel	Double integrator model.
FAKM	AKM Burn right-hand-side
FDC	The right hand side of equations formulated using Lagrange multipliers
FGs	Gyrostat attitude right-hand-side with optional damping.
FPivot	Computes the right hand side of the spacecraft with pivot eofm.
FRB	Rigid body right-hand-side.
FRBWithMag	Rigid body right-hand-side with magnetic torque computed internally.
FTB	Two body spacecraft model right-hand-side.
FXModel	Plant for a momentum bias spacecraft with flexible solar arrays.
GSModel	Gyrostat dynamics model which computes acceleration or plant matrices.
GetFlex	Reads in flex data from a formatted text file.
GravityGradientAnalytical	Analytical eigenvalues for gravity gradient stabilization.
GravityGradientBoom	Compute frequencies for a boom
GravityGradientEigenvalues	Compute the eigenvalues for a gravity gradient stabilized spacecraft.
GravityGradientFrequency	Gravity gradient frequencies
LinOrbNormalized	Computes the normalized linearized orbit state equations.
MBModel	Momentum bias spacecraft model
NutationMWA	Nutation with a momentum wheel
PlotFlex	Plots the flex model including the mode shapes.
RBModel	Computes the angular acceleration of a rigid body.
RHSCMG	Spacecraft attitude and orbit dynamics with a disturbance function.
RHSGGRotational	Right-hand-side for spacecraft attitude dynamics with gravity gradient.
RHSGyroNBody	Right hand side for n bodies and a central hub with reaction wheels.
RHSGyroWithOrbit	Right-hand-side for spacecraft attitude and orbit with a gyro.
RHSNBodyCentralHub	Right-hand-side for n rigid bodies attached to a central hub.
RHSNBodySH	Right-hand-side for n rotating bodies attached to a central hub.
RHSNSpacecraft	Computes the time derivative of n spacecraft.
RHSPlanetTakeoff	Right-hand-side for a 2 dimensional planet takeoff.
RHSPointMass	Spacecraft orbit dynamics with time-varying mass.
RHSRWAOrbit	Computes the right hand side for a spacecraft with reaction wheels.
RHSReactionWheel	Right-hand-side for spacecraft attitude with reaction wheels.
RHSRigidBody	Spacecraft attitude and orbit dynamics with a disturbance function.
RHSRigidBody6DOF	6 DOF spacecraft dynamics with a double integrator position model.
RHSRigidBodyLinear	Linearized attitude dynamics for a rigid body.
RHSRigidBodyMass	Spacecraft attitude and orbit dynamics with time-varying mass.
RHSRigidBodyOffsetCM	Right hand side of a rigid body with offset CM
RHSRigidBodyWithDamping	Rigid body dynamics with damping.
RHSRigidBodyWithTarget	Right-hand-side of spacecraft dynamical equations with a second spacecraft.
RHSSNP	Spacecraft sun-nadir RHS with 4 RWA's and 2 solar arrays.
RHSSlosh	Right hand side for a n bodies attached to a central hub.
RHSSpacecraftWithIMU	Right-hand-side for a spacecraft with an IMU
RHSThreeBody	Right hand side for a three body system.
SCWithRollPivot	Model for a spacecraft with a roll pivot.
SCwPivot	Model for a spacecraft with a single pivoted momentum wheel.
SeparationSim	Simulate separation of multiple satellites from a carrier.
StepTorque	Produces a step torque.
TBModel	Models two rigid bodies attached by a 1 to 3-dof hinge.
Tree	Right hand side of the equations of motion for a topological tree.
TreeAdd	Add a body to the tree data structure.
TreeH	Computes the momentum for the topological tree dynamics.
TreeInit	Create the tree data structure
TreePlot	Plot the output of tree.
TreePrnt	Print out the body information for the tree model.
VIModel	Computes the angular acceleration of a body with time varying inertia.
WireC	The right hand side of the wire equations formulated using Lagrange multipliers
WireDMch	Models the deployment mechanism
WireFRB	Spacecraft with multiple wires
WireH	Magnitude of the angular momentum
WireInit	Initialize the wire model data structures
WirePlot	Plot the wires. One wire is plotted on each page.

Environs

AlbedoFromTextureMap	Creates an albedo map from a texture map.
AtmJ70ToGround	Computes the atmospheric density using Jacchia's 1970 model or scale heights.
AtmNRLMSISE	NRLMSISE-00 Model 2001 for atmospheric density
AtmScaleHeightsStdAtm	Computes the atmospheric density using scale heights above 80 km.
BDipole	Computes the geocentric magnetic field based on a tilted dipole model.
BDipoleCoeff	Computes the geocentric magnetic coefficients for BDipole
BMF	Magnetic field based on the Mead-Fairfield Model.
DistAero	Computes the aerodynamic disturbance using a Newtonian model.
DistAlbedo	Computes the albedo disturbance
DistRadiation	Computes the radiation disturbance from the central body.
DistSolar	Computes the albedo disturbance.
DistributedAlbedo	Computes albedo from a texture map.
EarthAlb	Computes the heat absorbed per unit area due to albedo.
EarthEnvironment	Compute the environment parameters for the Earth.
EarthRad	Computes the heat absorbed due to earth radiation.
Geo	Computes parameters for a geosynchronous orbit.
GeoEclps	Computes the normalized sun intensity for an earth geosynchronous orbit.
GravitationalConstantEarth	Returns the Earth's gravitational constant.
LocalStarMap	Generates a local star map. Epoch is J2000.
MagField	Computes the Earth magnetic field using the DGRF/IGRF model.
MagFieldData	Data for planet magnetic fields.
MagFieldPlanet	Computes the magnetic field using Schmidt normalized coefficients.
MagneticDipole	Computes the magnetic field of a dipole along the z axis.
MagneticDipoleCart	Computes the magnetic field of a dipole along m.
MolWt2R	Computes R given the molecular weight.
NewtonianForceECI	Computes the Newtonian force in ECI coordinates.
RadiationBelts	Plots the radiation belts
ReadMagField	Read in the magnetic field from a file.
SolarFlux	Solar flux from the sun as a function of distance including sunspots
SolarFluxFromPlateECI	Computes the flux from a flat plate.
SolarFluxHistorical	Computes the solar flux prediction based on Julian date.
SolarFluxPrediction	Computes the solar flux prediction based on Julian date.
SolarFlx	Solar flux from the sun as a function of distance in AU.
StarTexture	Create a star texture for use in other programs.
SunBeta	Compute the sun beta angle from the sun vector and orbit.
TerminatorPlanet	Computes the terminator circle on a planet.
TerrestrialSolarFlux	Solar flux and direction from the sun with seasonal variation.
UDipole	Computes the geocentric magnetic field based on a tilted dipole model.
VAtm	Atmospheric velocity from position and planetary rate.
WMM	Loads in the World Magnetic Model coefficients file
Water	Properties of water.

Ephem

CEcl2Eq	Transformation matrix from ecliptic to Earth equatorial planes.
Callmkspk	Creates an SPK file from two text files.
DeltaML	Compute total change in longitude between two orbits.
ECIToECIR	Computes the transformation form ECI to ECIR.
ECIToPlanet	Computes the matrix from mean of Aries 2000 to planet fixed frame.
EOfE	Computes the equation of the equinoxes
EarthEclipseDuration	Compute the eclipse duration in earth orbit.
EarthNut	The matrix that rotates from the Earth mean axes to the true axes.
EarthPre	Computes the earth precession matrix
EarthRot	Computes the Earth greenwich matrix that transforms from ECI to EF.
EarthRotationZero	Determine jD for when the earth-fixed frame is aligned with the ECI frame.
EarthRte	Computes the mean earth rate.
Eclipse	Computes eclipses.
EclipseDuration	Computes eclipse orbit fraction.
EclipseFill	Puts a fill in to show when the spacecraft is eclipsed.
EclipseFromECI	Computes eclipses from time and ECI position.
EquatorialToGalactic	Returns the equatorial to Galactic transformation matrix.
FSolstice	RHS for computing solstice.
GASTime	Compute Greenwich apparent sidereal time.
GMSTime	Compute Greenwich mean sidereal time from Julian date.
GTrack	Calculate a ground track on an ellipsoid.
HMS2S	Converts hours, minutes and seconds into seconds
ISSOrbit	Generate Keplerian elements for the ISS
JDToFirstOfMonth	Finds first day of month for a Julian date
LagrangePointsL1ToL5	Computes the position of Lagrange points in normalized rotating
LoadFK5	Reads in the FK5 catalog in MICA format.
LoadSolarFluxHistory	Load the solar flux history and save a new mat-file
LoadSolarPredictionData	Load predicted sunspot and radio flux data and create a mat-file
LocalSolarTime	Computes local solar time.
MSidDay	Computes a mean sidereal day
MSolDay	Computes a mean solar day.
MoonEl	Computes the moon orbital elements with respect to the earth inertial frame.
MoonV1	Generate the moon vector in an earth or spacecraft centered frame.
MoonV2	Generate the moon vector in an earth or spacecraft centered frame.
Moons	Lists moons of a planet or planet center about which a moon orbits.
NutDelta	The changes in longitude and obliquity due to earth nutation.
ObOfE	Computes the mean obliquity of the ecliptic of date.
Parallax	Calculate the parallax
PlanetPosition	The position vectors, gravitational parameters and velocity for the planets.
PlanetRotation	Computes the mean planet rotation rates from their rotation periods.
PlanetYear	Length of year of planets in terms of Earth years.
Planets	Simplified planet ephemerides from the almanac.
QSpin	Creates a series of quaternions with its x axis spinning about u.
QSunNadir	Compute the sun-nadir quaternion and other quantities.
QSunPointing	Creates a sun reference frame with +x pointing at the sun.
RMoonECI	Generate the moon position in the earth-centered inertial frame.
RSunECI	Generate the sun position in the earth-centered inertial frame.
ReadBSPFile	Read a bsp file.
S2HMS	Converts seconds into hours, minutes and seconds
SolarSys	Computes the position vectors of the planets as a function of time.
SolarSystemElements	Computes the solar system elements on a given Julian Date.
SolarSystemProperties	Look up a moon or planet and return its properties.
SolarVisibility	Compute the solar intensity experienced by a spacecraft.
SortFK5	Sort FK5 by distance in light years and save in a new file
StarMap	Draws a star map.
SunNadir	Compute the sun-nadir angles and yaw rate.
SunV1	Generate the sun vector in the earth-centered inertial frame.
SunV2	Moderate precision sun model.
SunVectorECI	Finds the sun vector any place in the solar system.
TerminatorLine	Compute the terminator line on the Earth that defines day/night.
TransformLagrangePoints	Computes the position and velocity of stable Lagrange points.
TruEarth	Computes the matrix from mean of Aries 2000 to earth fixed frame.
UVAA	Apparent sun vector from quantities tabulated in the astronomical almanac.
WorstEclipseFraction	Worst-case eclipse fraction
WriteBSPFile	Create a bsp file

GOESData

G0758910.BIN;1	Example GOES data.
SATPOS.TXT;1	Satellite positions.

GOESRead

BHarm	Computes a sine/cosine harmonic series for the magnetic field.
BTrans	Transforms the GOES data into popular earth pointing frames.
GOESCD	Ordering information for the GOES CD-ROM.
GOESLeg	Draws the GOES Legend.
GOESLon	Computes the west longitude of a GOES spacecraft.
Glitch	Removes glitches from data.
LoadGOES	Loads GOES binary data. Will edit out magnetometer glitches.
LoadMag	Loads GOES magnetometer data. This can take a lot of data.
LoadSatP	Loads in GOES Satellite Positions
LoadSers	Loads GOES data from multiple files.
TwoC2F	Converts two's complement of length 2b to a floating point number.
WeathLeg	Draws the Weather Legends.
Weather	Loads GOES binary data. Will edit out magnetometer glitches.

GUIPlugIn

AttitudeProfilePlugIn	Generate attitude profiles.
CommandPlugIn	Create a command interface for a simulation.
DrawSCPlugIn	Draw spacecraft in orbit about a planet. Includes a separate controls window.
ElementsPlugIn	Create an orbit elements GUI plug in.
GUICounter	This gui displays a counter.
OrbitDisplayPlugIn	Create an orbit display.
ParseCommand	Parse a command string
PlugInDemo	Demonstrate using the GUI plug ins with an orbit simulation.
SpacecraftStatePlugIn	Create an spacecraft state GUI plug in.

Hardware

FloatToWord	Convert floating point to word.
HMagEl	Computes the magnetic field for a filament or loop magnetic element.
PivotMch	Models a pivot mechanism and converts stepping motor steps to pivot angle.
WordToFloat	Convert an integer word to a floating point number.

MagneticControl

BFromHHysteresis	Flux density from the magnetic field due to hysteresis.
Dipole	Compute the magnetic field of a dipole
DipoleFromField	Computes the dipole for a solid magnet.
MagControlThreeAxis	Dipole vector needed to produce a torque given the magnetic field over time.
MagControlTwoAxis	Two axis magnetic control dipole
MagTorquer	Models a magnetic torquer.
MagneticHysteresis	Right hand side for a dynamical model of magnetic hysteresis.
MagneticTorquer	Simple MagneticTorquer model. Outputs the torque in body coordinates.
RHSHysteresisDamper	Right hand side for a dynamical model of magnetic hysteresis.
TorqueHysteresisDamper	Torque from a hysteresis damper.
TorqueRod	Torque rod model using tanh

MannedVehicle

ECLSSSizing	Sizes an Environmental Control and Life Support subsystem (ECLSS).
ISSCoord	Computes the coordinates in the ISS frame

SCData

030201AP_SK_SM546_T45.bsp	JPL Ephemerides binary support file
Apophis.obj	OBJ file of the Apophis asteroid.
AtmData.txt	Standard atmosphere data field
AutoCADColors.txt	Generate colors for AUTOCAD.
BRIGHT.CAT	Bright star catalog.
CLIPPER.dxf	Pan Am space clipper.
Clipper.cad	CAD data that goes with CLIPPER
ComSat.txt	Text file with ComStar CAD data
Commands.txt	Commands
ComstarSA.txt	Comstar solar array
FK5.100	FK5 catalog.
HUBBLE.dxf	Hubble space telescope.
PolylineTest.dxf	Polyline file.
SolarFluxPredictions.txt	ASCII solar flux data for SolarFluxPredictions.txt
TFIGHTER.dxf	Tie like fighter.
USS_LA.dxf	US submarine.
WMM.COF	World Magnetic Model coefficients file
X1.bsp	BSP file.
bin2000.405	JPL 405 ephemeris data for the planets, 2000 to 2040
cassini.dxf	Cassini CAD Model
orion.obj	Orion OBJ file
probe.dxf	Huygens CAD model.
sCTConstants.mat	Constant database.
sts.txt	Shuttle NORAD 2 line elements.
visual.txt	Visible satellite NORAD 2 line elements
zvezda1.dxf	Zvezda module.
ScDB	GUI to output the value of a constant for a spacecraft.

SCDatabase

ScDB	GUI to output the value of a constant for a spacecraft.

SCMat

Ariel.mat	Texture map.
AttitudeProfileExampleData.mat	Example data for attitude profile
Callisto.mat	Texture map.
CassiniColor.mat	Cassini model colored.
Charon.mat	Texture map.
DefaultSpacecraftDataFile.mat	Saved spacecraft component data.
Deimos.mat	Texture map.
Dione.mat	Texture map.
EarthHR.mat	High resolution Earth texture map.
EarthMR.mat	Medium res Earth texture map without clouds.
ElementSet.mat	Orbital element set
Enceladus.mat	Texture map.
Europa.mat	Texture map.
FlexM00.mat	Flex model, array at 0 deg.
FlexM90.mat	Flex model, array at 90 deg.
GEMT1.mat	GEM-T1 gravity model.
Ganymede.mat	Texture map.
Huygens.mat	Spacecraft CAD model.
IGRF11.mat	IGRF magnetic field data, 2010.
IGRF95.mat	IGRF magnetic field data, 1995.
Iapetus.mat	Texture map.
Jupiter.mat	Texture map.
Kp_ap_Ap_SN_F107_since_1932.mat	Solar and magnetic index history
Mars.mat	Texture map.
Mercury.mat	Texture map.
Mimas.mat	Texture map.
Miranda.mat	Texture map.
Moon.mat	Texture map.
NRLMSIS.mat	Data needed by AtmNRLMSISE
Neptune.mat	Texture map.
Oberon.mat	Texture map.
Phobos.mat	Texture map.
Pluto.mat	Texture map.
Proteus.mat	Texture map.
RCS.mat	Thruster unit vectors and positions
RYC.mat	Roll/yaw control data.
Rhea.mat	Texture map.
SCHelp.mat	Help file data
Saturn.mat	Creates the rings of Saturn.
SolarFluxPredictions.mat	Solar flux data for 2000-2040
SolarFluxPredictions2020.mat	Solar flux data for 2000-2020
Sun.mat	Texture map.
TelemetryData.mat	A telemetry page data sete
Tethys.mat	Texture map.
Titan.mat	Texture map.
Titania.mat	Texture map.
Triton.mat	Texture map.
Umbriel.mat	Texture map.
Uranus.mat	Texture map.
Venus.mat	Texture map.
WMM.mat	World magnetic model coefficients.
planet.mat	Planet file

SCModels

Astronaut.mat	Astronaut CAD component
COMETS_Data.mat	Comets spacecraft CAD data.
Cassini.mat	Spacecraft CAD components.
CubeSat3UModel.mat	3U CubeSat
FlatPlate.mat	Flat plate CAD model.
FlatPlates.mat	Two flat plates CAD model.
ISS.mat	International Space Station CAD model.
ISS2.obj	International Space Station Wavefront obj file.
NanoSatModel.mat	Nanosat CAD model.
SCForImaging.mat	Stored CAD model for thermal imaging demos.
SCwRWA.mat	CAD model with reaction wheels.
SatWThrusters.mat	Model for a simple satellite with thrusters.
ShuttleModel.mat	Shuttle CAD model with rotating doors and arm.
SimpleSat.mat	Satellite CAD model of a simple cube.
TwoArraySC.mat	Spacecraft with two rotating arrays for system studies.
XYZSat.mat	Simple spacecraft with axes.

Sensor

AI2Rate	Converts attitude increments to rate.
AiryDisk	Computes the diameter of the Airy Disk.
AreaOfRectCircInt	Computes the area of intersection of a rectangle and a circle.
AutoPoint	Compute the parameters necessary to place a camera at a target.
CW2Roll	Converts the output from a conical scanning sensor to roll.
CalibrateSunSensor	Calibrate a sun sensor
CameraDatabase	Get default camera properties for different camera models.
CameraImage	Generates the 2D coordinates in the focal plane for a camera.
CameraResolution	Resolution of an optical sensor.
CameraTransform	Generate a camera transformation.
CentroidNoise	Compute centroid noise terms for an optical sensor.
Counter	Simulate a counter.
ESA	Simulates an ideal earth sensor measuring roll and pitch.
ESACS	Models a conical scanning earth sensor.
ESAChord	Compute the delta earth chord for a scanning earth sensor.
EnergyPerRing	Energy per ring for a diffraction limited circular aperture
FP2RADec	Converts focal plane coordinates into right ascension/declination of the targets.
FPSensors	Computes the output of focal plane sensors.
FSDG	Gyro right-hand-side.
GPSNavDemo	Demonstrate GPS navigation message model.
GPSOrbit	Position and velocity of a GPS satellite in the earth-fixed reference frame.
GPSReceiver	GPS receiver model. Models the GPS constellation.
GPSReceiverNav	GPS receiver model with navigation message model.
GPSSatellite	Gives the location of the GPS satellites at JD.
GPSTimeDilation	GPS time dilation.
GravitationalTimeDilation	Gravitational time dilation.
Gyro	Models a gyro.
GyroData	Typical gyro noise data.
HRG	Model a hemispherical resonating gyro. Includes all noise sources
HSAData	Computes the hsa (horizon) sensor data for a spinning spacecraft.
HSAPlot	Plots the HSA sensor data.
HorizonUnitVectors	Compute horizon unit vectors
IFOV	Instantaneous field of view of an optical sensor.
IMU	Inertial measurement unit model.
Illumination	Camera illumination model.
IntensityDistribution	Computes the pixel map intensity.
LightDetectorIntegrals	Normalized stellar-light detector integral given a star type and detector
MeasAccel	Models accelerometers. This model includes quantization, noise and a bias.
MeasEarthSensor	Returns roll and pitch for a generic earth sensor.
MeasMagnetometerEarth	Returns magnetic field measurement in Earth orbit.
MeasRateGyro	Returns body rate information.
MeasRateIntegratingGyro	Model of a rate integrating gyro measurement.
MeasRelativePosition	Returns relative position information.
MeasStarTracker	Returns the output of a star tracker.
MeasState	Returns elements of a state vector as a measurement.
MeasSunSensorAnalog	Returns analog sun sensor measurements.
MeasSunSensorDigital	Returns digital sun sensor measurements.
Nadir	Computes nadir angle from a cant angle, earth angle and chordwidth
NavObservables	Computes optical navigation observables.
NavigationMeasurement	Navigation measurement model.
Optic2D	Models a generic 2 dimensional optical sensor.
PlanetSensorDualScan	A dual scan Earth Sensor model
PointCameraDemo	Demonstrate camera pointing. The default 10 deg FOV camera is used.
PointCameraModel	Compute the MATLAB camera pointing parameters from the camera model.
PointSpreadFunction	Point spread function for a circular aperture
QProp	Propagates a quaternion based on updated angular increment measurements.
RADec2FP	Converts right ascension and declination into focal plane coordinates.
RHSClockDrift	Gravitational and velocity clock drift.
RHSMEMSGyro	Simulate a MEMS gyro
RIGModel	Computes the output of a rate integrating gyro package.
RIGOut	RIG output.
RangeMeasurement	Computes range and range rate measurements.
RateGyro	Model a rate gyro. Includes all noise sources
SCClock	Models a spacecraft clock.
SDG	Single degree of freedom mechanical gyros.
SSA	Simulates a single axis suns sensor
SSEye	Power series model for the output of an analog sun sensor.
SolarSystemObservables	Displays navigation observables for two NASA missions.
Spectrum	Gives the spectrum for radiation using conventional names.
StaticEarthSensor	Static Earth sensor model
StellarIrradiance	Computes the stellar irradiance.
SunSensor	Two detector sun sensor.
ToneRanging	Demo
U2FP	Computes the location in the focal plane of unit vectors.
U2Pix	Converts a unit vector into a pixel location.
VelocityTimeDilation	Velocity time dilation.
ZoomLens	Compute the L3 lens position in a Cooke Triplet.

SystemDesign

AddRobotArm	Add a multi-element arm to a CAD models.
BathtubCurve	Generates a failure bathtub curve
JHAPLSatelliteMass	Mass breakdown of JHU APL satellites.
PowerDesign	Sizes the battery and solar array
SatelliteSubsystemMass	Create masses for a satellite from scaling laws.
StructureAnalysis	Analyze the structure of a small agile satellite.

Tools

AlphaBetaToU	Compute a unit vector given alpha and beta angles.
AltitudeSH	Computes the altitude over a spherical harmonic terrain map.
CreateVCDisturbanceFile	Create a VisualCommander disturbance file from a cad model.
DrawFieldLines	Draw field lines on a sphere.
EarthOrbitSimulation	Coupled attitude and orbit simulation
NRLArray	Generates data for the NRL SolarCon solar array.
TargetSlew	Compute a slew to a target.
TileOBJSphere	Creates a segmented unit sphere Wavefront obj and mtl files.

Visualization

AnimateOrbit	Animate a spacecraft model in orbit
AnimateSpacecraft	Animate spacecraft CAD models in a relative frame
LoadEarthMap	Creates a figure with Earth texturemap, political boundaries, and lat/lon.
PlotPlanet	Add planet to the current axes.
PlotPlanetOrbit	Plot a 3D orbit around a planet in the ECI or planet fixed frame.
PltOrbit	Plots one orbit and the sun vector looking down on the ECI Plane.

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