Subsidenoituminen

Subsidenoituminen refers to the process of a spacecraft, particularly a satellite, gradually descending in its orbital altitude. This phenomenon is typically caused by atmospheric drag, especially in low Earth orbit (LEO). Even in the upper reaches of the atmosphere, there are still enough molecules present to exert a slight resistance on a moving object. This drag acts against the satellite's velocity, causing it to lose orbital energy. Over time, this energy loss results in a reduction of the satellite's altitude.

Factors that influence the rate of subsidenoituminen include the satellite's size and shape, its mass, and the density of the atmosphere. Satellites with larger surface areas relative to their mass experience greater drag. Atmospheric density, in turn, is influenced by solar activity; periods of high solar activity can heat and expand the Earth's upper atmosphere, increasing drag.

To counteract subsidenoituminen and maintain their intended orbits, satellites often employ thrusters to boost their altitude. Without such interventions, satellites in LEO will eventually re-enter the Earth's atmosphere, where they typically burn up due to the intense heat generated by friction. Understanding and managing subsidenoituminen is crucial for the operational longevity and mission success of many spacecraft.