Dynamic Geometry Library

• Standardized component technology for rapid-assembly of applications
• Compute dynamic analysis based on high-precision JulianDate type time
• Accurately model the Earth, Moon, and planets
• Precise platform positioning and orientation modeling for:
  • - Orbit and waypoint propagation
  • - Sensor geometry modeling
• Access complex numerical and geometry algorithms to:
  • - Manipulate points, axes, vectors, and reference frames
  • - Interpolate and extrapolate
  • - Find roots and extremums
• Leverage high fidelity intervisibility engine for computation of access intervals

Time

• A high-precision JulianDate type
• Time standards, including UTC, UT1, TAI, TT, TDB, and GPS and conversions between them

Coordinates

• Cartesian, Spherical, Cartographic (Longitude, Latitude, Altitude) and more
• Orbital elements including Delaunay, Equinoctial, Keplerian and Modified Keplerian

Rotations

• Matrix3By3, UnitQuaternion, EulerSequence, YawPitchRoll and more

Earth modeling

• Earth Orientation Parameters (Pole Wander and UTC/UT1 difference)
• IAU 1976 precession model
• IAU 1980 nutation model
• IERS Technical Note 21
• J2000, Mean Equator Mean Equinox, Mean Ecliptic Mean Equinox, Mean Ecliptic True Equinox, True Equator True Equinox, True Equator Mean Equinox, Fixed

Modeling of other central bodies

• IAU 2000 and 2006 models of the orientation of the Sun and Moon

Geometry transformation engine (like STK's Vector Geometry Tool)

• Points, axes, vectors, reference frames, and scalar
• Observe a point in any reference frame
• Observe a vector in any set of axes
• Find a transformation between any two sets of axes or reference frames

Orbit propagation

• Two Body, J2 and J4 propagators
• Propagate from a Two-Line Element Set (TLE) using SGP4
• Multithreaded for scalability and to take full advantage of multicore systems

Waypoint propagation

• Shortest path over an ellipsoid
• Useful for modeling aircraft and ground vehicles

Sensor modeling

• Rectangular, complex conic, Synthetic Aperture Radar (SAR)
• Compute access using a sensor
• Find the projection of a sensor onto the Earth or other central body

Access (intervisibility)

• Determine the times when one object can "see" another
• Account for light-time delay and aberration
• Multithreaded for scalability and to take full advantage of multicore systems

JPL planetary and lunar ephemerides

• Determine the positions and velocities of the planets and Earth's moon
• Nutation and libration

Numerical methods

• Brent bracketing root and extremum finders
• Find the places where an arbitrary function crosses a threshold value
• Lagrange and Hermite interpolation/extrapolation
• Translational and rotational motion interpolators
• Polynomial modeling and root finding

Platforms

• Extensible, high-level objects for modeling satellites, facilities, aircraft, etc.