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  2. Orbiter (simulator) - Wikipedia

    en.wikipedia.org/wiki/Orbiter_(simulator)

    Orbiter was developed as a simulator, [14] with accurately modeled planetary motion, gravitation effects (including non-spherical gravity), free space, atmospheric flight and orbital decay. [15] [16] The position of the planets in the solar system is calculated by the VSOP87 solution, while the Earth-Moon system is simulated by the ELP2000 ...

  3. GAMESS (US) - Wikipedia

    en.wikipedia.org/wiki/GAMESS_(US)

    The GAMESS (US) software also provides a comprehensive bonding analysis technique based on the Quasi-Atomic Orbital (QUAO) analysis proposed by professor Klaus Ruedenberg. The QUAO analysis provides a quasi-atomical perspective of bonding molecular orbitals in molecules.

  4. List of quantum chemistry and solid-state physics software

    en.wikipedia.org/wiki/List_of_quantum_chemistry...

    They may also include density functional theory (DFT), molecular mechanics or semi-empirical quantum chemistry methods. The programs include both open source and commercial software. Most of them are large, often containing several separate programs, and have been developed over many years.

  5. Systems Tool Kit - Wikipedia

    en.wikipedia.org/wiki/Systems_Tool_Kit

    Systems Tool Kit (formerly Satellite Tool Kit), often referred to by its initials STK, is a multi-physics software application from Analytical Graphics, Inc. (an Ansys company) that enables engineers and scientists to perform complex analyses of ground, sea, air, and space platforms, and to share results in one integrated environment. [1]

  6. List of molecular graphics systems - Wikipedia

    en.wikipedia.org/wiki/List_of_molecular_graphics...

    Edit, visualize and run simulations on various molecular systems. Spartan: MM QM: Proprietary [23] Standalone program [24] Visualize and edit biomolecules, extract bound ligands from PDB files for further computational analysis, full molecular mechanics and quantum chemical calculations package with streamlined graphical user interface. UCSF ...

  7. Spacecraft flight dynamics - Wikipedia

    en.wikipedia.org/wiki/Spacecraft_flight_dynamics

    Final v s, θ s and r must match the requirements of the target orbit as determined by orbital mechanics (see Orbital flight, above), where final v s is usually the required periapsis (or circular) velocity, and final θ s is 90 degrees. A powered descent analysis would use the same procedure, with reverse boundary conditions.

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