488881335 by Unknown

Author:Unknown
Language: eng
Format: epub

Periapsis and Periapsis is the closest point in the satellite’s orbit to the body being orbited, and apoapsis is the farthest point in the satellite’s orbit to the body being orbited. -apsis is the suffix for a general body, so every orbit has a periapsis. -gee is the suffix for Earth, so all satellites orbiting the Earth have a perigee. -helion is the suffix for the Sun, so all satellites orbiting the Sun have a perihelion.

Argument of Periapsis (also called Argument of Perihelion/Perigee) The angle between the point on the orbit that intersects the extended equator line and the closest point in the orbit to Earth (perigee). A circular orbit with 0 inclination will have an argument of perigee of 0 degrees. This parameter essentially moves the closest point in the orbit to Earth to a different point along the orbit.

Longitude of the Ascending Node The angle between a longitudinal reference (something like the Sun) and the direction of the ascending node, the point when the “climbing” part of the orbit intersects with the extended equator. This parameter can be used to “rotate” the orbit around the Earth.

Don’t worry if you don’t totally understand all of the parameters. That’s what visuals are for. With orbital mechanics out of the way, let’s get to Python. We’ll start by plotting a 2D static plot of a satellite orbit around Earth, animating the 2D plot, creating a 3D plot of the same orbit, and finally, animating the 3D plot.

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