Description

Properties for an Initial State segment.

Object Model

Public Methods

DisableControlParameter	Disables a control parameter.
EnableControlParameter	Enables a control parameter.
IsControlParameterEnabled	Sees if a control is enabled.
SetElementType	Selects an coordinate type.

Public Properties

ControlParametersAvailable	Returns whether or not the control parameters can be set.
CoordSystemName	The coordinate system.
Element	The elements of the selected coordinate type.
ElementType	The coordinate type.
FuelTank	The fuel tank parameters.
OrbitEpoch	The orbit epoch. Uses DateFormat Dimension.
SpacecraftParameters	The spacecraft parameters.
UserVariables	Interface used to modify user variables for the initial state segment.

Example

Configure initial state segment

[C#] Copy Code

// Add a new segment and cast the segment to the IAgVAMCSInitialState interface 

IAgVAMCSSegment segment = driver.MainSequence.Insert(AgEVASegmentType.eVASegmentTypeInitialState, "Inner Orbit", "-"); 

IAgVAMCSInitialState initState = segment as IAgVAMCSInitialState; 

 

initState.CoordSystemName = "CentralBody/Earth Fixed"; 

initState.OrbitEpoch = "1 Jan 2012 12:00:00.000"; 

 

// Set element type and cast the Element property to the appropriate interface 

// configure the element as necessary 

initState.SetElementType(AgEVAElementType.eVAElementTypeCartesian); 

IAgVAElementCartesian cartesian = initState.Element as IAgVAElementCartesian; 

cartesian.Vx = 8051.21; 

cartesian.Y = 55; 

cartesian.Z = 0; 

cartesian.Vx = 0.45; 

cartesian.Vy = 8.10158; 

cartesian.Vz = 3.51009; 

 

// Configure fuel tank if necessary 

initState.FuelTank.FuelDensity = 1001; 

initState.FuelTank.FuelMass = 501; 

initState.FuelTank.TankPressure = 5001; 

initState.FuelTank.TankTemperature = 292; 

 

// Configure spacecraft parameters 

initState.SpacecraftParameters.Cd = 2.3; 

initState.SpacecraftParameters.Ck = 1.1; 

initState.SpacecraftParameters.Cr = 1.3; 

initState.SpacecraftParameters.DragArea = 21; 

initState.SpacecraftParameters.DryMass = 501; 

initState.SpacecraftParameters.K1 = /*$k1$K1*/2; 

initState.SpacecraftParameters.K2 = 3; 

initState.SpacecraftParameters.RadiationPressureArea = 23.0; 

initState.SpacecraftParameters.SolarRadiationPressureArea = 22.0;

Configure initial state segment

[Visual Basic .NET] Copy Code

' Add a new segment and cast the segment to the IAgVAMCSInitialState interface
Dim segment As IAgVAMCSSegment = driver.MainSequence.Insert(AgEVASegmentType.eVASegmentTypeInitialState, "Inner Orbit", "-")
Dim initState As IAgVAMCSInitialState = TryCast(segment, IAgVAMCSInitialState)

 initState.CoordSystemName = "CentralBody/Earth Fixed"
 initState.OrbitEpoch = "1 Jan 2012 12:00:00.000"

' Set element type and cast the Element property to the appropriate interface
' configure the element as necessary
 initState.SetElementType(AgEVAElementType.eVAElementTypeCartesian)
Dim cartesian As IAgVAElementCartesian = TryCast(initState.Element, IAgVAElementCartesian)
 cartesian.Vx = 8051.21
 cartesian.Y = 55
 cartesian.Z = 0
 cartesian.Vx = 0.45
 cartesian.Vy = 8.10158
 cartesian.Vz = 3.51009

' Configure fuel tank if necessary
 initState.FuelTank.FuelDensity = 1001
 initState.FuelTank.FuelMass = 501
 initState.FuelTank.TankPressure = 5001
 initState.FuelTank.TankTemperature = 292

' Configure spacecraft parameters
 initState.SpacecraftParameters.Cd = 2.3
 initState.SpacecraftParameters.Ck = 1.1
 initState.SpacecraftParameters.Cr = 1.3
 initState.SpacecraftParameters.DragArea = 21
 initState.SpacecraftParameters.DryMass = 501
 initState.SpacecraftParameters.K1 = 2
 initState.SpacecraftParameters.K2 = 3
 initState.SpacecraftParameters.RadiationPressureArea = 23
 initState.SpacecraftParameters.SolarRadiationPressureArea = 22

Insert an Initial State Segment into the MCS and configure

[MATLAB] Copy Code

% IAgVADriverMCS driver: MCS driver interface 
initState = driver.MainSequence.Insert('eVASegmentTypeInitialState', 'Inner Orbit', '-'); 
initState.InitialState.Epoch = scenario.StartTime; 
initState.SetElementType('eVAElementTypeKeplerian'); 
kep = initState.Element; 
kep.PeriapsisRadiusSize = 6700; 
kep.ArgOfPeriapsis = 0; 
kep.Eccentricity = 0; 
kep.Inclination = 0; 
kep.RAAN = 0; 
kep.TrueAnomaly = 0;

CoClasses that Implement IAgVAMCSInitialState

Name
AgVAMCSInitialState

AGI STK Astrogator 11	Send comments on this topic.
IAgVAMCSInitialState Interface