Article | REF: TRP4046 V1

Space Trajectories. Atmospheric reentry

Author: Max CERF

Publication date: April 10, 2020, Review date: April 26, 2021

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2. Equations of motion

During atmospheric re-entry, the physical quantities of interest are related to the position and velocity of the vehicle relative to the Earth and the atmosphere. This leads us to write the equations of motion in spherical coordinates in the rotating geocentric frame of reference.

2.1 Rotating geocentric marker

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2.1.1 Galilean frame of reference

The equations of motion are given by Newton's second law in a galilean reference frame, also called inertial or absolute. The reference frame considered...

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Equations of motion