AGI STK Astrogator 11 Send comments on this topic.
IsControlParameterEnabled Method (IAgVAMCSInitialState)
See Also 
Param





Description

Sees if a control is enabled.

Syntax

[Visual Basic .NET]
Public Function IsControlParameterEnabled( _
   ByVal Param As AgEVAControlInitState _
) As Boolean

[C#]
public bool IsControlParameterEnabled(
AgEVAControlInitState Param
);

[Managed C++]
public: bool IsControlParameterEnabled(
AgEVAControlInitState Param
);

[Java]
public bool isControlParameterEnabled(
AgEVAControlInitState Param
);

[Unmanaged C++]
public: HRESULT IsControlParameterEnabled(
AgEVAControlInitState Param,
VARIANT_BOOL * ReturnValue
);

Parameters

Param
Member Value Description
eVAControlInitStateFuelMass 300 Fuel Mass - the mass of the spacecraft propellant. Enter a value in the selected mass unit (e.g. kg).
eVAControlInitStateCartesianVx 301 Vx Component - the X component of the spacecraft velocity vector.
eVAControlInitStateCartesianVy 302 Vy Component - the Y component of the spacecraft velocity vector.
eVAControlInitStateCartesianVz 303 Vz Component - the Z component of the spacecraft velocity vector.
eVAControlInitStateCartesianX 304 X Component - the X component of the spacecraft position vector.
eVAControlInitStateCartesianY 305 Y Component - the Y component of the spacecraft position vector.
eVAControlInitStateCartesianZ 306 Z Component - the Z component of the spacecraft position vector.
eVAControlInitStateCd 307 Drag Coefficient (Cd) - the dimensionless drag coefficient associated with the drag area.
eVAControlInitStateCr 308 Solar Radiation Pressure (Spherical) Coefficient (Cr) - the reflectivity of the spacecraft used for solar radiation pressure calculations, where 2.0 is fully reflective and 1.0 is not reflective at all.
eVAControlInitStateDragArea 309 Drag Area - the cross-sectional area of the spacecraft assumed perpendicular to the direction of motion, used for atmospheric drag calculations. Enter a value in the selected distance unit squared.
eVAControlInitStateDryMass 310 Dry Mass - the mass of the spacecraft exclusive of propellant. Enter a value in the selected mass unit (e.g. kg).
eVAControlInitStateEpoch 311 Epoch - the orbit epoch.
eVAControlInitStateFuelDensity 312 Fuel Density - the density of the fuel tank.
eVAControlInitStateK1 313 GPS Solar Radiation Pressure K1 - if you are using a non-spherical SRP model, this field defines the model's K1 (scale) value.
eVAControlInitStateK2 314 GPS Solar Radiation Pressure K2 - if you are using a non-spherical SRP model, this field defines the model's K2 (Y bias) value.
eVAControlInitStateKeplerianEcc 315 Eccentricity - the ratio of the distance between the foci to the major axis of the orbital ellipse. Dimensionless.
eVAControlInitStateKeplerianInc 316 Inclination - the angle from the +Z axis of the coordinate system to the angular momentum vector of the spacecraft's orbit.
eVAControlInitStateKeplerianRAAN 317 Right Ascension of Ascending Node - the angle between the X direction of the coordinate system and the point where the orbit crosses the X-Y plane in the +Z direction.
eVAControlInitStateKeplerianSMA 318 Semimajor Axis - half the length of the major (longest) axis of the orbital ellipse.
eVAControlInitStateKeplerianTA 319 True Anomaly - the angle from the periapsis of the orbit to the spacecraft's position vector, measured in the direction of spacecraft motion.
eVAControlInitStateKeplerianW 320 Argument of Periapsis - the angle measured in the direction of spacecraft motion, in the orbit plane, from the ascending node to the periapsis of the orbit.
eVAControlInitStateModifiedKeplerianEcc 321 This enumeration is deprecated.
eVAControlInitStateModifiedKeplerianInc 322 This enumeration is deprecated.
eVAControlInitStateModifiedKeplerianRAAN 323 This enumeration is deprecated.
eVAControlInitStateModifiedKeplerianRp 324 This enumeration is deprecated.
eVAControlInitStateModifiedKeplerianTA 325 This enumeration is deprecated.
eVAControlInitStateModifiedKeplerianW 326 This enumeration is deprecated.
eVAControlInitStateRadiationPressureArea 327 Radiation Pressure (Albedo/Thermal) Area - the cross-sectional area of the spacecraft assumed perpendicular to the direction of central body radiation, used for central body radiation (albedo / thermal pressure) calculations.
eVAControlInitStateCk 328 Radiation Pressure (Albedo/Thermal) Coefficient (Ck) - the reflectivity of the spacecraft used for central body radiation pressure (albedo / thermal pressure) calculations, where 2.0 is fully reflective and 1.0 is not reflective at all.
eVAControlInitStateSphericalAz 329 Velocity Azimuth - the angle in the spacecraft local horizontal plane between the projection of the velocity vector onto that plane and the local +Z direction measured as positive in the clockwise direction from north.
eVAControlInitStateSphericalDec 330 Declination - the angle from the X-Y plane of the coordinate system to the spacecraft position vector.
eVAControlInitStateSphericalHorizFPA 331 Horizontal Flight Path Angle - the complement of the angle between the spacecraft velocity vector and the radius vector (90 deg minus the vertical flight path angle).
eVAControlInitStateSphericalRA 332 Right Ascension - angle measured in the inertial equatorial plane from the inertial X axis in a right-handed sense about the inertial Z axis to the spacecraft position vector.
eVAControlInitStateSphericalRMag 333 Radius Magnitude - the magnitude of the spacecraft position vector.
eVAControlInitStateSphericalVMag 334 Velocity Magnitude - the magnitude of the spacecraft velocity vector.
eVAControlInitStateSRPArea 335 Solar Radiation Pressure (Spherical) Area - the cross-sectional area of the spacecraft assumed perpendicular to the direction of solar radiation, used for solar radiation calculations.
eVAControlInitStateTankPressure 336 Tank Pressure - the fuel tank pressure.
eVAControlInitStateTankTemp 337 Tank Temperature - the temperature of the fuel tank.
eVAControlInitStateTargetVecInAsympDec 338 Declination of Incoming Asymptote - the declination of the incoming asymptote in the selected coordinate system.
eVAControlInitStateTargetVecInAsympRA 339 Right Ascension of Incoming Asymptote - the right ascension of the hyperbolic incoming asymptote in the selected coordinate system.
eVAControlInitStateTargetVecInVelAzAtPeriapsis 340 Velocity Azimuth at Periapsis - the inertial flight path azimuth of the trajectory measured at periapsis.
eVAControlInitStateTargetVecInC3 341 C3 Energy - the energy of the orbit, computed as - mu / a, where mu is the gravity constant of the central body and a is the semimajor axis.
eVAControlInitStateTargetVecInRadOfPeriapsis 342 Radius of Periapsis - distance from the center of mass of the central body to the periapsis of the hyperbolic orbit.
eVAControlInitStateTargetVecInTrueAnomaly 343 True Anomaly - the angle from the periapsis of the orbit to the spacecraft's position vector, measured in the direction of spacecraft motion.
eVAControlInitStateTargetVecOutAsympDec 344 Declination of Outgoing Asymptote - the declination of the outgoing asymptote in the selected coordinate system.
eVAControlInitStateTargetVecOutAsympRA 345 Right Ascension of Outgoing Asymptote - the right ascension of the hyperbolic outgoing asymptote in the selected coordinate system.
eVAControlInitStateTargetVecOutVelAzAtPeriapsis 346 Velocity Azimuth at Periapsis - the inertial flight path azimuth of the trajectory measured at periapsis.
eVAControlInitStateTargetVecOutC3 347 C3 Energy - the energy of the orbit, computed as - mu / a, where mu is the gravity constant of the central body and a is the semimajor axis.
eVAControlInitStateTargetVecOutRadOfPeriapsis 348 Radius of Periapsis - distance from the center of mass of the central body to the periapsis of the hyperbolic orbit.
eVAControlInitStateTargetVecOutTrueAnomaly 349 True Anomaly - the angle from the periapsis of the orbit to the spacecraft's position vector, measured in the direction of spacecraft motion.
eVAControlInitStateMaxFuelMass 350 Maximum Fuel Mass - the maximum fuel mass of the spacecraft; this parameter specifically applies to Finite Maneuver segments that are being executed in Backward Sequences.
eVAControlInitStateTankVolume 351 Tank Volume - the volume of the fuel tank.
eVAControlInitStateDelaunayG 352 G - Magnitude of orbital angular momentum, sqrt(GM * p).
eVAControlInitStateDelaunayH 353 H - Z component of orbital angular momentum, G cos(inc).
eVAControlInitStateDelaunayInc 354 Inclination - The angle between the angular momentum vector (perpendicular to the plane of the orbit) and the inertial Z axis.
eVAControlInitStateDelaunayL 355 L - Related to two-body orbital energy, sqrt(GM * a)
eVAControlInitStateDelaunayMeanAnomaly 356 Mean Anomaly - The angle from the eccentricity vector to a position vector where the satellite would be if it were always moving at its average angular rate.
eVAControlInitStateDelaunayRAAN 357 Right Ascension of Ascending Node - The angle from the inertial X axis to the ascending node measured in a right-handed sense about the inertial Z axis in the equatorial plane.
eVAControlInitStateDelaunaySemiLatusRectum 358 Semi-latus Rectum - Distance from focus to orbit at true anomaly of 90 degrees
eVAControlInitStateDelaunaySMA 359 Semimajor Axis - Half the length of the major (longest) axis of the orbital ellipse.
eVAControlInitStateDelaunayW 360 Argument of Periapsis - The angle from the ascending node to the eccentricity vector measured in the direction of the satellite's motion and in the orbit plane.
eVAControlInitStateEquinoctialH 361 H - With K, describe the shape and position of periapsis of the orbit, ecc * sin(RAAN + w)
eVAControlInitStateEquinoctialK 362 K - With H, describe the shape and position of periapsis of the orbit, ecc * cos(RAAN + w)
eVAControlInitStateEquinoctialMeanLongitude 363 Mean Longitude - RAAN + w + M
eVAControlInitStateEquinoctialMeanMotion 364 Mean Motion - The number of orbits per day (86400 sec/period), based on assumed two-body motion.
eVAControlInitStateEquinoctialP 365 P - With Q, describes the orientation of the orbit plane, tan(inc/2) * sin(RAAN)
eVAControlInitStateEquinoctialQ 366 Q - With P, describes the orientation of the orbit plane, tan(inc/2) * cos(RAAN)
eVAControlInitStateEquinoctialSMA 367 Semimajor Axis - Half the length of the major (longest) axis of the orbital ellipse.
eVAControlInitStateMixedSphericalAltitude 368 Altitude - The object's position above or below the reference ellipsoid. Altitude is measured along a normal to the surface of the reference ellipsoid.
eVAControlInitStateMixedSphericalAzimuth 369 Azimuth - The angle in the satellite local horizontal plane between the projection of the inertial velocity vector onto this plane and the local north direction measured as positive in the clockwise direction.
eVAControlInitStateMixedSphericalHorizFPA 370 Horizontal Flight Path Angle - The complement of the angle between the inertial velocity vector and the radius vector.
eVAControlInitStateMixedSphericalLatitude 371 Latitude - The geodetic latitude of a point is the angle between the normal to the reference ellipsoid that passes through the satellite position and the equatorial plane.
eVAControlInitStateMixedSphericalLongitude 372 Longitude
eVAControlInitStateMixedSphericalVerticalFPA 373 Vertical Flight Path Angle - The angle between the inertial velocity vector and the radius vector.
eVAControlInitStateMixedSphericalVMag 374 Velocity Magnitude - The magnitude of the inertial velocity vector.
eVAControlInitStateSphericalVerticalFPA 375 Vertical Flight Path Angle - The angle between the inertial velocity vector and the radius vector.
eVAControlInitStateKeplerianApoapsisAltShape 376 Apoapsis Altitude - Shape Parameter - Distance from the surface of the central body to the point of maximum radius in the orbit.
eVAControlInitStateKeplerianApoapsisAltSize 377 Apoapsis Altitude - Size Parameter - Distance from the surface of the central body to the point of maximum radius in the orbit.
eVAControlInitStateKeplerianApoapsisRadShape 378 Apoapsis Radius - Shape Parameter - Distance from the center of the central body to the point of maximum radius in the orbit.
eVAControlInitStateKeplerianApoapsisRadSize 379 Apoapsis Radius - Size Parameter - Distance from the center of the central body to the point of maximum radius in the orbit.
eVAControlInitStateKeplerianArgLat 380 Argument of Latitude - The sum of the True Anomaly and the Argument of Perigee.
eVAControlInitStateKeplerianEccAnomaly 381 Eccentric Anomaly - Angle measured with an origin at the center of the ellipse from the direction of perigee to a point on a circumscribing circle from which a line perpendicular to the SMA intersects the position of the satellite on the ellipse.
eVAControlInitStateKeplerianLAN 382 Longitude of Ascending Node - Longitude of the Ascending Node is the Earth-fixed longitude where the satellite has crossed the inertial equator from south to north based on an assumption of two-body motion.
eVAControlInitStateKeplerianMeanAnomaly 383 Mean Anomaly - The angle from the eccentricity vector to a position vector where the satellite would be if it were always moving at its average angular rate.
eVAControlInitStateKeplerianMeanMotion 384 Mean Motion - The number of orbits per day (86400 sec/period), based on assumed two-body motion.
eVAControlInitStateKeplerianPeriapsisAltShape 385 Periapsis Altitude - Shape Parameter - Distance from the surface of the central body to the point of minimum radius in the orbit.
eVAControlInitStateKeplerianPeriapsisAltSize 386 Periapsis Altitude - Size Parameter - Distance from the surface of the central body to the point of minimum radius in the orbit.
eVAControlInitStateKeplerianPeriapsisRadShape 387 Periapsis Radius - Shape Parameter - Distance from the center of the central body to the point of minimum radius in the orbit.
eVAControlInitStateKeplerianPeriapsisRadSize 388 Periapsis Radius - Size Parameter - Distance from the surface of the central body to the point of minimum radius in the orbit.
eVAControlInitStateKeplerianPeriod 389 Period - The duration of one orbit, based on assumed two-body motion.
eVAControlInitStateKeplerianTimePastAN 390 Time Past Ascending Node - The elapsed time since the last ascending node crossing based on assumed two-body motion.
eVAControlInitStateKeplerianTimePastPeriapsis 391 Time Past Periapsis - The elapsed time since the last perigee passage based on assumed two-body motion.

See Also

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STK Programming Interface 11.0.1