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  2. Simplified perturbations models - Wikipedia

    en.wikipedia.org/.../Simplified_perturbations_models

    This set of models is often referred to collectively as SGP4 due to the frequency of use of that model particularly with two-line element sets produced by NORAD and NASA. These models predict the effect of perturbations caused by the Earth’s shape, drag, radiation, and gravitation effects from other bodies such as the sun and moon.

  3. BSTAR - Wikipedia

    en.wikipedia.org/wiki/BSTAR

    BSTAR is a way of modeling aerodynamic drag on a satellite in the simplified general perturbation model 4 satellite orbit propagation model. [1]Traditionally, aerodynamic resistance ("drag") is given by

  4. Two-line element set - Wikipedia

    en.wikipedia.org/wiki/Two-line_element_set

    The paper also described two simplified versions of the system, IGP4 which used a simplified drag model, and SGP4 (Simplified General Perturbations) which used IGP4's drag model along with a simplified gravity model. [8] The differences between the three models were slight for most objects.

  5. Talk:Simplified perturbations models - Wikipedia

    en.wikipedia.org/wiki/Talk:Simplified...

    This is the talk page for discussing improvements to the Simplified perturbations models article. This is not a forum for general discussion of the article's subject. Put new text under old text.

  6. SGP4 - Wikipedia

    en.wikipedia.org/?title=SGP4&redirect=no

    This page was last edited on 3 August 2011, at 22:34 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may ...

  7. Liza Minnelli found her first husband ‘in a compromising ...

    www.aol.com/liza-minnelli-found-her-first...

    Liza Minnelli has been married and divorced four times, but her first union left her "truly devastated." The entertainer, who famously starred as Sally Bowles in the film version of "Cabaret," is ...

  8. Could probiotics help reduce anxiety? - AOL

    www.aol.com/could-probiotics-help-reduce-anxiety...

    For this study, Le and his team used a model of germ-free C57BL/6 mice — mice that have had their gut microbiomes removed — to study a potential link between gut microbes and anxiety.

  9. Geopotential spherical harmonic model - Wikipedia

    en.wikipedia.org/wiki/Geopotential_spherical...

    In geophysics and physical geodesy, a geopotential model is the theoretical analysis of measuring and calculating the effects of Earth's gravitational field (the geopotential). The Earth is not exactly spherical, mainly because of its rotation around the polar axis that makes its shape slightly oblate.

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