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  2. Two-ray ground-reflection model - Wikipedia

    en.wikipedia.org/wiki/Two-ray_ground-reflection...

    From the figure the received line of sight component may be written as = {() /}and the ground reflected component may be written as = {() (+ ′) / + ′}where () is the transmitted signal, is the length of the direct line-of-sight (LOS) ray, + ′ is the length of the ground-reflected ray, is the combined antenna gain along the LOS path, is the combined antenna gain along the ground-reflected ...

  3. Vincenty's formulae - Wikipedia

    en.wikipedia.org/wiki/Vincenty's_formulae

    Vincenty's goal was to express existing algorithms for geodesics on an ellipsoid in a form that minimized the program length (Vincenty 1975a). His unpublished report (1975b) mentions the use of a Wang 720 desk calculator, which had only a few kilobytes of memory.

  4. Microsoft Excel - Wikipedia

    en.wikipedia.org/wiki/Microsoft_Excel

    A chart created with data from a Microsoft Excel spreadsheet that only saves the chart. To save the chart and spreadsheet save as .XLS. XLC is not supported in Excel 2007 or in any newer versions of Excel. Dialog .xld: Used in older versions of Excel. Archive .xlk: A backup of an Excel Spreadsheet Add-in (DLL) .xll

  5. Expected goals - Wikipedia

    en.wikipedia.org/wiki/Expected_goals

    The expected goals metric is generally calculated by determining the likelihood of a shot being scored based on various factors, taken from the moment before the player shoots. These factors may vary depending on the statistical model, but include the distance to the goal, angle, quality of the shot, and other characteristics.

  6. Goal seeking - Wikipedia

    en.wikipedia.org/wiki/Goal_seeking

    Basic goal seeking functionality is built into most modern spreadsheet packages such as Microsoft Excel. According to O'Brien and Marakas, [1] optimization analysis is a more complex extension of goal-seeking analysis. Instead of setting a specific target value for a variable, the goal is to find the optimum value for one or more target ...

  7. Range of a projectile - Wikipedia

    en.wikipedia.org/wiki/Range_of_a_projectile

    d is the total horizontal distance travelled by the projectile. v is the velocity at which the projectile is launched g is the gravitational acceleration —usually taken to be 9.81 m/s 2 (32 f/s 2 ) near the Earth's surface

  8. Glossary of Australian rules football - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_Australian...

    Behind: a score worth one point, earned by putting the ball between a goal post and a behind post, or by the ball hitting a goal post, or by the ball being touched prior to passing between the goalposts. [3] Behind posts: two shorter vertical posts 19.2m apart on the goal line at each end of the ground, centred about the taller goal posts.

  9. American football field - Wikipedia

    en.wikipedia.org/wiki/American_football_field

    A goal is centered on each end line, consisting of a horizontal crossbar 10 feet (3.0 m) above the ground and aligned with the inside edge of the end line, with vertical goal posts (colloquially "uprights") at each end of the crossbar 18 feet 6 inches (5.64 m) apart and extending at least 35 feet (11 m) above the crossbar.