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  2. 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]

  3. Static timing analysis - Wikipedia

    en.wikipedia.org/wiki/Static_timing_analysis

    Static timing analysis (STA) is a simulation method of computing the expected timing of a synchronous digital circuit without requiring a simulation of the full circuit. High-performance integrated circuits have traditionally been characterized by the clock frequency at which they operate.

  4. Iridium satellite constellation - Wikipedia

    en.wikipedia.org/wiki/Iridium_satellite...

    The solution will be supported using a version of the NB-IoT standard for 5G non-terrestrial networks (NTN). Scheduled for launch in 2026, it won't replace the company's proprietary solution for voice and high-speed data; instead it will co-exist with that offering on the Iridium's existing global low-earth orbit satellite network. [69] [70]

  5. Two-line element set - Wikipedia

    en.wikipedia.org/wiki/Two-line_element_set

    The term "low orbit" may refer to either the altitude (minimal or global) or orbital period of the body. Historically, the SGP algorithms defines low orbit as an orbit of less than 225 minutes. Two-digit Epoch Years from 57 to 99 correspond to 1957–1999 and those from 00 to 56 correspond to 2000–2056. [16]

  6. Signoff (electronic design automation) - Wikipedia

    en.wikipedia.org/wiki/Signoff_(electronic_design...

    STA is run as a replacement for SPICE, because SPICE simulation's runtime makes it infeasible for full-chip analysis modern designs. Electromigration lifetime checks – To ensure a minimum lifetime of operation at the intended clock frequency without the circuit succumbing to electromigration.

  7. Orbital state vectors - Wikipedia

    en.wikipedia.org/wiki/Orbital_state_vectors

    Orbital position vector, orbital velocity vector, other orbital elements. In astrodynamics and celestial dynamics, the orbital state vectors (sometimes state vectors) of an orbit are Cartesian vectors of position and velocity that together with their time () uniquely determine the trajectory of the orbiting body in space.

  8. Kepler problem - Wikipedia

    en.wikipedia.org/wiki/Kepler_problem

    The Kepler problem and the simple harmonic oscillator problem are the two most fundamental problems in classical mechanics. They are the only two problems that have closed orbits for every possible set of initial conditions, i.e., return to their starting point with the same velocity (Bertrand's theorem). [1]: 92

  9. Limit cycle - Wikipedia

    en.wikipedia.org/wiki/Limit_cycle

    By the Jordan curve theorem, every closed trajectory divides the plane into two regions, the interior and the exterior of the curve.. Given a limit cycle and a trajectory in its interior that approaches the limit cycle for time approaching +, then there is a neighborhood around the limit cycle such that all trajectories in the interior that start in the neighborhood approach the limit cycle ...