The Ground Vehicle Object

The Ground Vehicle object models the properties and behavior of a vehicle that travels on the surface of the earth. Select one or more of the following to model a ground vehicle, impose constraints, and define the ground vehicle's subobjects:

Basic Properties

Property Description
Route Define the ground vehicle's route using one the following propagators:
Great ArcDefines a point-by-point path over or below the surface of the Earth with position and altitude or depth defined at each point.
StkExternalEnables you to read the ephemeris for a vehicle from a file.
RealTimeEnables you to propagate vehicle ephemeris using near-real-time data received over a Connect socket.
Attitude Define an attitude profile for the ground vehicle.
Lighting Define the eclipse central body list used for lighting computations.
Ground Ellipses Add a set of ellipses for the ground vehicle.
Description Record useful information about the ground vehicle.
Processing Delay The summed time values of the processing delays specified by each object in the strand plus the light time delay between object pairs in the strand. The light time delay between object pairs is computed simply based on the objects positions divided by the speed of light.
EOIR Shape Specify EOIR image generation properties for the ground vehicle. This works with STK's Electro-Optical Infrared (EOIR) capability.

2D Graphics Properties

Property Description
Attributes Define color, line style, and other graphics characteristics for the ground vehicle, and choose whether to inherit or override global attributes defined at the scenario level.
Route Define the graphical display of the ground vehicle in the 2D Graphics window.
Range Define range contours representing the various regions of the surface that can see an object at the specified level.
Lighting Define the graphical display of lighting conditions for the ground vehicle during animation.
Ground Ellipses Set display graphics for an ellipse set defined for the ground vehicle.
Radar Cross Section Define the 2D contour graphics for the desired frequency.

3D Graphics Properties

Property Description
Route Define route properties for the ground vehicle.
Attitude Sphere The Attitude Sphere is a visualization aid that, when combined with vector display, constitutes a powerful tool for displaying the ground vehicle's attitude and for tracking attitude changes over time.
Vector Control the display of vectors and other geometric elements related to the ground vehicle.
Covariance Define the graphical display of a 3D ellipsoid.
Model Specify a model to represent the ground vehicle in the 3D Graphics window and then scale the model and adjust the position of any model articulations.
Offsets Position a model and marker representing the ground vehicle in the 3D Graphics window by offsetting the object from its reference frame.
Model Pointing Point parts of the ground vehicle model toward a target, such as the Sun or Earth.
Range Display range contours for the ground vehicle. Range contours display in accordance with the values set for 2D Graphics Range Contours for the ground vehicle.
Data Display Display dynamic data for the ground vehicle in the 3D Graphics window.
Ground Ellipses Set display graphics for an ellipse set defined for the ground vehicle.
Radar Cross Section Control the 3D display of RCS contour lines.

Constraints

Property Description
Active

Impose constraints on access from the following available constraint categories for a Ground Vehicle object:

  • Basic: The most commonly used constraints
  • Angle: Constraints that involve an angular measure
  • Geometry: Constraints that use a geometric measure (other than angle), such as range, altitude, and grazing altitude
  • Analysis Workbench (AWB): Constraints that involve an Analysis Workbench (AWB) component (Angle, Calculation Scalar, Condition, or Vector)
  • Central Body: Constraints involving the location of the Sun, planets, and moons
  • Multifunction Radar: Constraints pertaining to a multifunction radar
  • Multifunction Radar Jamming: Constraints pertaining to a multifunction radar in the presence of jamming transmissions
  • Plugins: Your own plugin constraints, which compute a plugin-defined metric that you define
  • Radar SAR: Constraints pertaining to a SAR radar
  • Radar SAR Jamming: Constraints pertaining to a SAR radar in the presence of jamming transmissions
  • Radar SearchTrack: Constraints pertaining to a search/track radar
  • Radar SearchTrack Jamming: Constraints pertaining to a search/track radar in the presence of jamming transmissions
  • Temporal: Constraints related to specified time-of-day or time intervals
  • Zones: Constraints using longitude or latitude as the measure
Settings Select access constraint conditions that apply generally to access computations involving a Ground Vehicle object.

RF Properties

Property Description
Environment Apply environmental factors that affect the performance of a communications link or a radar system.
Radar Cross Section Specify the radar cross section (RCS) parameters.

LASER Properties

Property Description
Environment Apply environmental factors that affect the performance of a laser communications link.

Subobjects

You can attach the following subobjects to a Ground Vehicle: